TERMIUM Plus^®

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Hydrogen thyratron typically utilizes titanium hydride in its reservoir, and the hydrogen gas is released when the reservoir is heated and recombined into titanium hydride when the temperature cools down.  2, record 1, English, - hydrogen%20thyratron

Record 1,  Textual support,  French

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

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An effect observed in nickel-cadmium and nickel–metal hydride rechargeable batteries[, which] gradually lose their maximum energy capacity if they are repeatedly recharged after being only partially discharged.  3, record 2, English, - battery%20memory%20effect

Record 2,  Textual support,  French

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[Phénomène physico-chimique affectant] les batteries de type NiCd (nickel cadmium) et NiMH (nickel hydrure métallique), ce phénomène [qui] se traduit par une diminution progressive de la capacité de charge (autonomie) d'une batterie lorsque celle-ci est mise à recharger avant qu'elle soit vide.  2, record 2, French, - effet%20m%C3%A9moire

Record 2,  Textual support,  Spanish

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[...] fenómeno que reduce la capacidad de las baterías [níquel cadmio (NiCd) y níquel e hidruro metálico (NiMH)] con cargas incompletas [,] se produce cuando se carga una batería sin haber sido descargada del todo [...]  1, record 2, Spanish, - efecto%20memoria

Record 3,  Textual support,  English

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A nickel-metal hydride cell, abbreviated NiMH, is a type of rechargeable battery similar to the nickel-cadmium cell. The NiMH battery uses a hydrogen-absorbing alloy for the negative electrode instead of cadmium. As in NiCd cells, the positive electrode is nickel oxyhydroxide(NiOOH). A NiMH battery can have two to three times the capacity of an equivalent size nickel-cadmium battery.  2, record 3, English, - nickel%20metal%2Dhydride%20battery

Record 3,  Textual support,  French

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Accumulateur au nickel-métal-hydrure. Comme ils offrent une plus grande capacité que les accumulateurs NiCd, ils sont plus souvent utilisés pour les appareils photo numériques. Ils ne créent pas d’effet de mémoire comme les accumulateurs NiCd et peuvent donc être rechargés avant d’être entièrement déchargés. Il est possible de recharger les accumulateurs NiMH 500 fois environ.  1, record 3, French, - accumulateur%20au%20nickel%2Dm%C3%A9tal%2Dhydrure

Record 3,  Textual support,  Spanish

Record number: 3, Textual support number: 1 DEF

Batería de acumuladores con un electrolito de hidróxido de potasio acuoso, un electrodo positivo que contiene níquel en estado de hidróxido de níquel y un electrodo negativo que contiene hidrógeno en forma de hidruro metálico.  5, record 3, Spanish, - bater%C3%ADa%20de%20n%C3%ADquel%2Dhidruro%20met%C3%A1lico

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Una batería de níquel-hidruro metálico (Ni-MH) es un tipo de batería recargable que utiliza un ánodo de oxidróxido de níquel (NiOOH), como la batería de níquel cadmio, pero su cátodo es de una aleación de hidruro metálico.  2, record 3, Spanish, - bater%C3%ADa%20de%20n%C3%ADquel%2Dhidruro%20met%C3%A1lico

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Las baterías recargables son capaces de liberar una corriente muy elevada, pues la corriente máxima está limitada por su resistencia interna. Las baterías de NiMH, de mayor capacidad que las de NiCd [níquel-cadmio] (un 70% más), tienen en cambio una resistencia interna algo superior a las de NiCd.  4, record 3, Spanish, - bater%C3%ADa%20de%20n%C3%ADquel%2Dhidruro%20met%C3%A1lico

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 DEF

The attack on zircaloy cladding by hydrogenous substances, leading to local segregation of zirconium hydride.  1, record 4, English, - sun%20burst

Record number: 4, Textual support number: 1 OBS

sun burst: term and definition standardized by ISO.  2, record 4, English, - sun%20burst

Record 4,  Textual support,  French

Record number: 4, Textual support number: 1 DEF

Attaque des gaines en zircaloy par des produits hydrogénés conduisant à une ségrégation locale d'hydrure de zirconium.  1, record 4, French, - hydruration

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hydruration : terme et définition normalisés par l'ISO.  2, record 4, French, - hydruration

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Record 5,  Textual support,  English

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The hypothetical radical of the monocarbon series (CH₃), the base of pyroxylic or wood spirit or pyroligneous naphtha, of formic acid and of a large series of organic compounds.  2, record 5, English, - methyl

Record number: 5, Textual support number: 1 OBS

[also] attrib. and Comb., as methyl compound, radical, etc. ;esp. in names of salts of methyl, e. g. methyl bromide, chloride, hydride. Also prefixed(often without hyphen) to the name of an organic compound to express the addition of methyl to its composition, or the replacement of hydrogen atoms by equivalents of methyl, as in methylacetonamine, methylaniline, methylcarbonic(acid), methyl-codeia, methyluramine, etc.  2, record 5, English, - methyl

Record 5,  Textual support,  French

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Radical monovalent de formule CH₃-, prototype des radicaux alkyles.  2, record 5, French, - m%C3%A9thyle

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S'utilise aussi comme préfixe ou en apposition, pour indiquer la présence du méthyle. P. ex. : méthylaniline, bromure de méthyle.  2, record 5, French, - m%C3%A9thyle

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Record 6,  Textual support,  English

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A chemical compound which appears under the form of a flammable, white powder which sometimes turns gray on standing, which is prepared by the reaction of aluminium chloride with lithium hydride, which is used as a reducing agent for over 60 different functional groups, especially for pharmaceuticals, perfumes, and fine organic chemicals, which converts esters, aldehydes, and ketones to alcohols and nitriles to amines, which constitutes a source of hydrogen, and which is used as a propellant and a catalyst in polymerizations.  5, record 6, English, - lithium%20tetrahydridoaluminate

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lithium aluminum hydride : usual name in the USA; part of the Ingredient Disclosure List of the Hazardous Products Act(Registration SOR/88-64, December 31, 1987) ;the International Union of Pure and Applied Chemistry(IUPAC) recommends the form "aluminium" rather than "aluminum. "  1, record 6, English, - lithium%20tetrahydridoaluminate

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LAH: This might be an in-house or a non-recognized abbreviation; not to be used alone, to avoid any risk of confusion.  1, record 6, English, - lithium%20tetrahydridoaluminate

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Chemical formula: LiAlH₄ or AlH₄·Li  5, record 6, English, - lithium%20tetrahydridoaluminate

Record 6,  Textual support,  French

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hydrure d'aluminium et de lithium : fait partie de la Liste de divulgation des ingrédients de la Loi sur les produits dangereux (du Canada; enr. DORS s/88-64, 31 déc. 1987).  3, record 6, French, - t%C3%A9trahydruroaluminate%20de%20lithium

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Formule chimique : LiAlH₄ ou AlH₄·Li  3, record 6, French, - t%C3%A9trahydruroaluminate%20de%20lithium

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Record 7,  Textual support,  English

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A chemical compound which appears usually in solution in one of the C₅ to C₇ hydrocarbons, in which it is quite stable, which is irritant, and which is used in the polymerization of isoprene and butadiene, as an intermediate in the preparation of lithium hydride, as a rocket fuel component and as a metalating agent.  3, record 7, English, - butyllithium

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butyllithium: form recommended by the IUPAC (International Union of Pure and Applied Chemistry).  2, record 7, English, - butyllithium

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n-butyllithium: The prefix "n" must be italicized; obsolete form.  2, record 7, English, - butyllithium

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Chemical formula: C₄H₉Li or CH₃CH₂CH₂CH₂Li  3, record 7, English, - butyllithium

Record 7,  Textual support,  French

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butyllithium : forme recommandée par l'UICPA (Union internationale de chimie pure et appliquée).  2, record 7, French, - butyllithium

Record number: 7, Textual support number: 2 OBS

n-butyllithium : Le préfixe «n» s'écrit en italique; forme vieillie.  2, record 7, French, - butyllithium

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Formule chimique : C₄H₉Li ou CH₃CH₂CH₂CH₂Li  5, record 7, French, - butyllithium

Record 7,  Textual support,  Spanish

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Fórmula química: C₄H₉Li o CH₃CH₂CH₂CH₂Li  2, record 7, Spanish, - butil%2Dlitio

Record 8,  Textual support,  English

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Any coenzyme that mediates the transfer of hydrogen ions by alternating between an oxidized and a reduced form.  2, record 8, English, - hydrogen%20carrier

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The most important carriers of hydrogen in catabolic reactions [are] NADH and NAD+.... The part of the NAD+ molecule known as the nicotinamide ring is able to accept a hydrogen atom together with an additional electron(a hydride ion, H-), forming NADH. In this reduced form, the nicotinamide ring has a reduced stability because it is no longer stabilized by resonance. As a result, the added hydride ion is easily transferred to other molecules. In the biological oxidation of a substrate molecule such as an alcohol, two hydrogen atoms are lost from the substrate. One of these is added as a hydride ion to NAD+, producing NADH, while the other is released into solution as a proton(H+)  3, record 8, English, - hydrogen%20carrier

Record 8,  Textual support,  French

Record number: 8, Textual support number: 1 DEF

Toute coenzyme pouvant exister sous forme oxydée ou sous forme réduite, qui intervient dans les réactions couplées d'hydrogénation et de déshydrogénation. Les principaux transporteurs d'hydrogène sont le NAD, le NADP et le FAD.  1, record 8, French, - transporteur%20d%27hydrog%C3%A8ne

Record 8,  Textual support,  Spanish

Record 9,  Textual support,  English

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sodium borohydride. Properties : White crystalline powder; soluble in water, ammonia, amines, pyridine, and dimethyl ether of diethylene glycol; insoluble in other ethers, hydrocarbons and alkyl chlorides.... Derivation : By reaction of sodium hydride and trimethyl borate at 250°C... Uses : Source of hydrogen and other borohydrides. Reduces aldehydes, ketones and acid chlorides; bleaching wood pulp; blowing agent for plastics; precipitation of mercury from waste effluent(by reduction) ;decolorizer for plasticizers...  3, record 9, English, - sodium%20borohydride

Record number: 9, Textual support number: 1 OBS

Chemical formula: NaBH₄ or BH₄Na  4, record 9, English, - sodium%20borohydride

Record 9,  Textual support,  French

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Blanchiment réducteur. Ce projet explore les pouvoirs de blanchiment et d'inhibition de la réversion de blancheur d'agents réducteurs dérivés du bore. Le borohydrure de sodium (NaBH₄) est un agent réducteur connu, mais son coût est trop élevé pour qu'il soit utilisé dans l'industrie des pâtes et papiers.  2, record 9, French, - borohydrure%20de%20sodium

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Formule chimique : NaBH₄ ou BH₄Na  3, record 9, French, - borohydrure%20de%20sodium

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Record 10,  Textual support,  English

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Properties : White crystalline material... Use : Reducing agent similar to lithium aluminum hydride.  2, record 10, English, - sodium%20aluminum%20hydride

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Chemical formula: NaAlH₄  3, record 10, English, - sodium%20aluminum%20hydride

Record 10,  Textual support,  French

Record number: 10, Textual support number: 1 OBS

Formule chimique : NaAlH₄  2, record 10, French, - hydrure%20de%20sodium%20et%20d%27aluminium

Record 10,  Textual support,  Spanish

Record 11,  Textual support,  English

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Mechanisms of Corrosion Fatigue. The generalized corrosion fatigue cracking mechanism involves the single or mutual occurrence of hydrogen-induced cracking or anodic dissolution at the crack tip. Hydrogen embrittlement(hydrogen-induced cracking or hydrogen-assisted cracking) can be divided into five types of mechanisms : 1) decohesion 2) pressure 3) adsorption 4) deformation 5) brittle hydride …  1, record 11, English, - hydrogen%2Dassisted%20cracking

Record 11,  Textual support,  French

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Le retour d’expérience français et étranger des trente dernières années a montré l’apparition de très nombreuses fissures sur les composants en Alliage 600 et le problème constitue toujours la première cause de bouchage des tubes de GV [générateurs de vapeur]. Divers processus sont actuellement proposés pour rendre compte de ce mode d’endommagement. On peut brièvement citer les familles de modèles proposés […] — dissolution localisée par rupture de film […] — fissuration assistée par l’hydrogène : effet de pression interne […] clivage induit par le film […]  1, record 11, French, - fissuration%20assist%C3%A9e%20par%20l%26rsquo%3Bhydrog%C3%A8ne

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Record 12,  Textual support,  English

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... it is estimated that a hydride storage system could require as much as 100 kg of magnesium per vehicle.  1, record 12, English, - hydride%20storage%20system

Record 12,  Textual support,  French

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on estime qu'un système de stockage d'hydrure pourrait nécessiter jusqu'à 100 kg de magnésium par véhicule automobile.  1, record 12, French, - syst%C3%A8me%20de%20stockage%20d%27hydrure

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Record 13,  Textual support,  English

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The Intelligent Gravimetric Analyser(IGA) was initially developed for the accurate determination of hydrogen and deuterium absorption(desorption) characteristics in various storage alloys and intermetallics.... The intelligent nature of the IGA method is a pre-requisite to performing such experiments where equilibration time scales can increase by orders of magnitude during a hydride phase transition.... Semi-automatic features allow for pressure ramp and pressure cycle operations to be performed. In summary the IGA can measure capacity,..., operating pressures and can determine lifetimes using cycling studies.  1, record 13, English, - intelligent%20gravimetric%20analyser

Record 13,  Textual support,  French

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[Le] modèle d'analyseur gravimétrique intelligent d'hydrogène est utilisé pour déterminer la capacité d'emmagasinage et les caractéristiques de la charge-décharge des matériaux utilisés pour emmagasiner l'hydrogène, par exemple, dans les piles à combustible.  1, record 13, French, - analyseur%20gravim%C3%A9trique%20intelligent

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Record 14,  Textual support,  English

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A compound of the type MX, where X is fluorine, chlorine, bromine, or astatine, and M is another element or organic radical.  3, record 14, English, - halide

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In photography the silver halides, as chloride, bromide and iodide, form the most important light-sensitive substances which are fundamental to all the emulsions used in motion picture work.  4, record 14, English, - halide

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Among inorganic contaminants that can be treated by hydrolysis are metals that react with water : metal carbides(calcium carbide), hydrides(sodium aluminium hydride, NaAlH₄), amides(sodium amide, NaNH₂), alkoxides(sodium ethoxide, NaOC₂H₅) and halides(silicon tetrachloride, SiCl₄).  5, record 14, English, - halide

Record number: 14, Textual support number: 1 OBS

In marine environments, evaporite deposits comprise essentially pure halite ... and various halides (Cl, Br, I) of Ca, K, Na, Mg, and Sr.  6, record 14, English, - halide

Record 14,  Textual support,  French

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Combinaison d'un halogène avec un autre élément ou un radical.  5, record 14, French, - halog%C3%A9nure

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haloïde (adj.) : Se dit des sels résultant de la combinaison d'un halogène avec un autre élément très électropositif.  6, record 14, French, - halog%C3%A9nure

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Dans les milieux marins, les dépôts évaporitiques sont composés essentiellement de halite pure [...] à laquelle peuvent s'ajouter [...] divers halogénures (Cl,Br,I) de Ca, de K, de Na, de Mg et de Sr.  3, record 14, French, - halog%C3%A9nure

Record 14,  Textual support,  Spanish

Record 15,  Textual support,  English

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Metallic acetylide, azide, carbonoperoxoate, chloride, cyanide, hydride, hydroxide, nitrate, oxide, peroxide, salt, sodium, stearate, sulfide.  1, record 15, English, - metallic

Record 15,  Textual support,  French

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Dans les dénominations de familles de composés, l'adjectif anglais «metallic» ou le terme anglais «metal» employé adjectivement se traduisent en français par «métallique» de préférence à «de métal». P. ex. : acétylures métalliques, azides métalliques, azotures métalliques, carbonoperoxoates métalliques, chlorures métalliques, cyanures métalliques, hydroxydes métalliques, hydrures métalliques, nitrates métalliques, sels métalliques, stéarates métalliques et sulfures métalliques (tournures plus naturelles que celles formées avec «de métal»). En revanche, lorsqu'il est nécessaire de préciser la nature du métal (métaux alcalins, métaux alcalino-terreux, métaux de transition, métaux des terres rares, métaux lourds, etc.), il est préférable, pour éviter toute ambiguïté, d'utiliser la locution «de métal». P. ex. : peroxydes de métaux de transition (et non «peroxydes métalliques de transition»), peroxydes de métaux alcalins (et non «peroxydes métalliques alcalins»).  1, record 15, French, - m%C3%A9tallique

Record 15,  Textual support,  Spanish

Record 17,  Textual support,  English

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boranes: The molecular hybrides of boron, e.g. B₅H₉ pentaborane(9).  2, record 17, English, - borane

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In the name pentaborane(9), penta is a multiplying prefix indicating the number of boron atoms and the figure (9) the number of hydrogen atoms.  3, record 17, English, - borane

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borane: form recommended by the IUPAC (International Union of Pure and Applied Chemistry).  3, record 17, English, - borane

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K. Wade noted a relationship between the number of bonding electron pairs and the stoichiometry of boron hydride structures, which matched R. E. Williams’ classification of the boranes into three main structural categories : Those clusters in which boron atoms occupy n vertices of an n-cornered closed polyhedron=closo-boranes(B_nH_n^2-). Those whereupon boron atoms occupy n vertices of an(n+1)-cornered closed polyhedron=nido-boranes(B_nH_n+4). And those clusters in which boron atoms occupy n vertices of an(n+2)-cornered closed polyhedron=arachno-boranes(B_nH_n+6).  4, record 17, English, - borane

Record number: 17, Textual support number: 2 CONT

Varied conditions yield a multitude of polyhedral boranes. ... Structures: - Closo-boranes (B_nH_n^2-): (Greek "clovo" = cage): Complete polyhedron. - Nido-boranes (B_nH_n^4-: (Latin "nidus" = nest): Structures lack one vertex. - Arachno-boranes (B_nH_n^6-: "Spiderweb" structures lacking two vertices. - Hypho-boranes (B_nH_n^8-): "Net" structures lacking three vertices. - Conjuncto-boranes: "Joined subunit" structures, in which 2 or more of the above type are linked through a B-B or B-H-B bonds, or by a B atom.  5, record 17, English, - borane

Record 17,  Textual support,  French

Record number: 17, Textual support number: 1 DEF

Hydrure moléculaire du bore, par exemple : B₅H₉ pentaborane(9).  2, record 17, French, - borane

Record number: 17, Textual support number: 1 OBS

Dans le nom pentaborane(9), penta est un préfixe multiplicatif indiquant le nombre d'atomes de bore et le chiffre (9) le nombre d'atomes d'hydrogène.  3, record 17, French, - borane

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Les boranes n'existent pas à l'état naturel, et doivent être fabriqués en laboratoire. Le mot de borane désigne des hydrures de bore, ainsi que des composés organiques de formule générale BH₃R~ résultant de la substitution d'un ou de plusieurs atomes d'hydrogène du borane le plus simple BH. [...] Le bore, élément très léger, se distingue par une grande aptitude à former des dérivés hydrogénés de structures très variées : les atomes de bore peuvent en effet former des assemblages triangulaires (closoboranes), des chaînes ayant l'aspect d'un nid (nidoboranes) ou d'une toile d'araignée (arachnoboranes), et des dimères que l'on nomme conjonctoboranes. Il existe encore des halogénures et sous-halogénures de bore, et aussi des carboranes, où les atomes de bore ou d'hydrogène sont remplacés par des atomes de carbone.  4, record 17, French, - borane

Record number: 17, Textual support number: 2 OBS

borane : forme recommandée par l'UICPA (Union internationale de chimie pure et appliquée).  3, record 17, French, - borane

Record 17,  Textual support,  Spanish

Record number: 17, Textual support number: 1 DEF

Compuesto perteneciente a la serie de hidruros de boro. Son generalmente muy tóxicos.  1, record 17, Spanish, - borano

Record 18,  Textual support,  English

Record number: 18, Textual support number: 1 CONT

K. Wade noted a relationship between the number of bonding electron pairs and the stoichiometry of boron hydride structures, which matched R. E. Williams’ classification of the boranes into three main structural categories : Those clusters in which boron atoms occupy n vertices of an n-cornered closed polyhedron=closo-boranes(B_nH_n^2-). Those whereupon boron atoms occupy n vertices of an(n+1)-cornered closed polyhedron=nido-boranes(B_nH_n+4). And those clusters in which boron atoms occupy n vertices of an(n+2)-cornered closed polyhedron=arachno-boranes(B_nH_n+6).  2, record 18, English, - arachno%2Dborane

Record number: 18, Textual support number: 2 CONT

Varied conditions yield a multitude of polyhedral boranes. ... Structures: - Closo-boranes (B_nH_n^2-): (Greek "closo" = cage): Complete polyhedron. - Nido-boranes (B_nH_n^4-: (Latin "nidus" = nest): Structures lack one vertex. - Arachno-boranes (B_nH_n^6-: "Spiderweb" structures lacking two vertices. - Hypho-boranes (B_nH_n^8-): "Net" structures lacking three vertices. - Conjuncto-boranes: "Joined subunit" structures, in which 2 or more of the above type are linked through a B-B or B-H-B bonds, or by a B atom.  3, record 18, English, - arachno%2Dborane

Record number: 18, Textual support number: 1 OBS

arachno-: An affix used in names to designate a boron structure intermediate between nido- and hypho-.  4, record 18, English, - arachno%2Dborane

Record number: 18, Textual support number: 2 OBS

boranes: The molecular hybrides of boron, e.g. B₅H₉ pentaborane(9).  4, record 18, English, - arachno%2Dborane

Record number: 18, Textual support number: 3 OBS

For example: the compound arachno-tetraborane(10) is an arachno-borane composed of 4 boron atoms and 10 hydrogen atoms; formally it may be derived from nido-pentaborane(9) by the substraction of a boron atom.  5, record 18, English, - arachno%2Dborane

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An arachno-borane has a net-like structure 2).  5, record 18, English, - arachno%2Dborane

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arachno-borane: The affix "arachno" must be italicized; form recommended by the IUPAC (International Union of Pure and Applied Chemistry).  5, record 18, English, - arachno%2Dborane

Record 18,  Textual support,  French

Record number: 18, Textual support number: 1 CONT

Le mot de borane désigne des hydrures de bore, ainsi que des composés organiques de formule générale BH₃R~ résultant de la substitution d'un ou de plusieurs atomes d'hydrogène du borane le plus simple BH. [...] Le bore, élément très léger, se distingue par une grande aptitude à former des dérivés hydrogénés de structures très variées : les atomes de bore peuvent en effet former des assemblages triangulaires (closoboranes), des chaînes ayant l'aspect d'un nid (nidoboranes) ou d'une toile d'araignée (arachnoboranes), et des dimères que l'on nomme conjonctoboranes.  3, record 18, French, - arachno%2Dborane

Record number: 18, Textual support number: 1 OBS

arachno- : Affixe utilisé en nomenclature pour désigner une structure du bore qui, du point de vue de son ouverture, est intermédiaire entre nido- et hypho-.  4, record 18, French, - arachno%2Dborane

Record number: 18, Textual support number: 2 OBS

borane : Hydrure moléculaire du bore. Par exemple : B₅H₉ pentaborane(9).  4, record 18, French, - arachno%2Dborane

Record number: 18, Textual support number: 3 OBS

Par exemple : l'arachno-tétraborane(10) est un arachno-borane composé de 4 atomes de bore et 10 atomes d'hydrogène; on peut formellement le considérer comme un dérivé du nidopentaborane(9) formé par soustraction d'un atome de bore.  1, record 18, French, - arachno%2Dborane

Record number: 18, Textual support number: 4 OBS

Un arachno-borane a une structure en toile d'araignée 2).  1, record 18, French, - arachno%2Dborane

Record number: 18, Textual support number: 5 OBS

arachno-borane : L'affixe «arachno» s'écrit en italique; forme recommandée par l'UICPA (Union internationale de chimie pure et appliquée).  1, record 18, French, - arachno%2Dborane

Record 18,  Textual support,  Spanish

Record 19,  Textual support,  English

Record number: 19, Textual support number: 1 CONT

Among inorganic contaminants that can be treated by hydrolysis are metals that react with water : metal carbides(calcium carbide), hydrides(sodium aluminum hydride, NaAlH₄), amides(sodium amide, NaNH₂), alkoxides(sodium ethoxide, NaOC₂H₅) and halides(silicon tetrachloride, SiCl₄).  2, record 19, English, - amide

Record 19,  Textual support,  French

Record number: 19, Textual support number: 1 CONT

Les contaminants inorganiques pouvant être traités par hydrolyse incluent les métaux qui réagissent avec l'eau : carbures métalliques (carbures de calcium), hydrides (hydrides d'aluminium de sodium, NaAlH₄), amides (amides de sodium, NaNH₂), alkoxides (éthoxyde de sodium, NaOC₂H₅) et halides (tétrachlorure de silice, SiCl₄).  2, record 19, French, - amide

Record 19,  Textual support,  Spanish

Record number: 19, Textual support number: 1 DEF

Compuestos orgánicos considerados como derivados del amoníaco o de las aminas primarias o secundarias, mediante sustitución por grupos acilo de un hidrógeno unido al nitrógeno.  2, record 19, Spanish, - amida

Record 20,  Textual support,  English

Record number: 20, Textual support number: 1 CONT

K. Wade noted a relationship between the number of bonding electron pairs and the stoichiometry of boron hydride structures, which matched R. E. Williams’ classification of the boranes into three main structural categories : Those clusters in which boron atoms occupy n vertices of an n-cornered closed polyhedron=closo-boranes(B_nH_n^2-). Those whereupon boron atoms occupy n vertices of an(n+1)-cornered closed polyhedron=nido-boranes(B_nH_n+4). And those clusters in which boron atoms occupy n vertices of an(n+2)-cornered closed polyhedron=arachno-boranes(B_nH_n+6).  2, record 20, English, - nido%2Dborane

Record number: 20, Textual support number: 2 CONT

Varied conditions yield a multitude of polyhedral boranes. ... Structures: - Closo-boranes (B_nH_n^2-): (Greek "closo" = cage): Complete polyhedron. - Nido-boranes (B_nH_n^4-: (Latin "nidus" = nest): Structures lack one vertex. - Arachno-boranes (B_nH_n^6-: "Spiderweb" structures lacking two vertices. - Hypho-boranes (B_nH_n^8-): "Net" structures lacking three vertices. - Conjuncto-boranes: "Joined subunit" structures, in which 2 or more of the above type are linked through a B-B or B-H-B bonds, or by a B atom.  3, record 20, English, - nido%2Dborane

Record number: 20, Textual support number: 1 OBS

nido-: An affix used in names to denote a nest-like structure, especially a boron skeleton that is almost closed.  4, record 20, English, - nido%2Dborane

Record number: 20, Textual support number: 2 OBS

boranes: The molecular hybrides of boron, e.g. B₅H₉ pentaborane(9).  4, record 20, English, - nido%2Dborane

Record number: 20, Textual support number: 3 OBS

For example: the compound nido-pentaborane(9) is a nido-borane composed of 5 boron atoms and 9 hydrogen atoms; formally, it may be derived from closo-hexaborane(6) by the substraction of a boron atom.  5, record 20, English, - nido%2Dborane

Record number: 20, Textual support number: 4 OBS

nido-borane: The affix "nido" must be italicized; form recommended by the IUPAC (International Union of Pure and Applied Chemistry).  5, record 20, English, - nido%2Dborane

Record 20,  Textual support,  French

Record number: 20, Textual support number: 1 CONT

Le mot de borane désigne des hydrures de bore, ainsi que des composés organiques de formule générale BH₃R~ résultant de la substitution d'un ou de plusieurs atomes d'hydrogène du borane le plus simple BH. [...] Le bore, élément très léger, se distingue par une grande aptitude à former des dérivés hydrogénés de structures très variées : les atomes de bore peuvent en effet former des assemblages triangulaires (closoboranes), des chaînes ayant l'aspect d'un nid (nidoboranes) ou d'une toile d'araignée (arachnoboranes), et des dimères que l'on nomme conjonctoboranes.  3, record 20, French, - nido%2Dborane

Record number: 20, Textual support number: 1 OBS

nido- : Affixe utilisé pour désigner une structure en forme de nid; en particulier les squelettes d'atomes de bore presque fermés.  4, record 20, French, - nido%2Dborane

Record number: 20, Textual support number: 2 OBS

borane : Hydrure moléculaire du bore. Par exemple : B₅H₉ pentaborane(9).  4, record 20, French, - nido%2Dborane

Record number: 20, Textual support number: 3 OBS

Par exemple : le nido-pentaborane(9) est un nido-borane composé de 5 atomes de bore et de 9 atomes d'hydrogène; on peut formellement le considérer comme issu du closo-hexaborane(6) par soustraction d'un atome de bore.  1, record 20, French, - nido%2Dborane

Record number: 20, Textual support number: 4 OBS

nido-borane : L'affixe «nido» s'écrit en italique; forme recommandée par l'UICPA (Union internationale de chimie pure et appliquée).  1, record 20, French, - nido%2Dborane

Record 20,  Textual support,  Spanish

Record 21,  Textual support,  English

Record number: 21, Textual support number: 1 CONT

K. Wade noted a relationship between the number of bonding electron pairs and the stoichiometry of boron hydride structures, which matched R. E. Williams’ classification of the boranes into three main structural categories : Those clusters in which boron atoms occupy n vertices of an n-cornered closed polyhedron=closo-boranes(B_nH_n^2-). Those whereupon boron atoms occupy n vertices of an(n+1)-cornered closed polyhedron=nido-boranes(B_nH_n+4). And those clusters in which boron atoms occupy n vertices of an(n+2)-cornered closed polyhedron=arachno-boranes(B_nH_n+6).  2, record 21, English, - closo%2Dborane

Record number: 21, Textual support number: 2 CONT

Varied conditions yield a multitude of polyhedral boranes. ... Structures: - Closo-boranes (B_nH_n^2-): (Greek "closo" = cage): Complete polyhedron. - Nido-boranes (B_nH_n^4-: (Latin "nidus" = nest): Structures lack one vertex. - Arachno-boranes (B_nH_n^6-: "Spiderweb" structures lacking two vertices. - Hypho-boranes (B_nH_n^8-): "Net" structures lacking three vertices. - Conjuncto-boranes: "Joined subunit" structures, in which 2 or more of the above type are linked through a B-B or B-H-B bonds, or by a B atom.  3, record 21, English, - closo%2Dborane

Record number: 21, Textual support number: 1 OBS

closo-: An affix used in names to denote a cage or closed structure, especially a boron skeleton that is a polyhedron having all triangular faces.  4, record 21, English, - closo%2Dborane

Record number: 21, Textual support number: 2 OBS

boranes: The molecular hybrides of boron, e.g. B₅H₉ pentaborane(9).  4, record 21, English, - closo%2Dborane

Record number: 21, Textual support number: 3 OBS

For example: the compound closo-hexaborane(6) is a closo-borane composed of 6 boron atoms and 6 hydrogen atoms.  5, record 21, English, - closo%2Dborane

Record number: 21, Textual support number: 4 OBS

closo-borane: The affix "closo" must be italicized; form recommended by the IUPAC (International Union of Pure and Applied Chemistry).  5, record 21, English, - closo%2Dborane

Record 21,  Textual support,  French

Record number: 21, Textual support number: 1 CONT

Le mot de borane désigne des hydrures de bore, ainsi que des composés organiques de formule générale BH₃R~ résultant de la substitution d'un ou de plusieurs atomes d'hydrogène du borane le plus simple BH. [...] Le bore, élément très léger, se distingue par une grande aptitude à former des dérivés hydrogénés de structures très variées : les atomes de bore peuvent en effet former des assemblages triangulaires (closoboranes), des chaînes ayant l'aspect d'un nid (nidoboranes) ou d'une toile d'araignée (arachnoboranes), et des dimères que l'on nomme conjonctoboranes.  3, record 21, French, - closo%2Dborane

Record number: 21, Textual support number: 1 OBS

closo- : Affixe utilisé pour désigner une structure en cage ou fermée, en particulier pour les squelettes d'atomes de bore polyédriques à faces triangulaires.  4, record 21, French, - closo%2Dborane

Record number: 21, Textual support number: 2 OBS

borane : Hydrure moléculaire du bore. Par exemple : B₅H₉ pentaborane(9).  4, record 21, French, - closo%2Dborane

Record number: 21, Textual support number: 3 OBS

Par exemple : le closo-hexaborane(6) est un closo-borane composé de 6 atomes de bore et de 6 atomes d'hydrogène.  1, record 21, French, - closo%2Dborane

Record number: 21, Textual support number: 4 OBS

closo-borane : L'affixe «closo» s'écrit en italique; forme recommandée par l'UICPA (Union internationale de chimie pure et appliquée).  1, record 21, French, - closo%2Dborane

Record 21,  Textual support,  Spanish

Record 22,  Textual support,  English

Record number: 22, Textual support number: 1 DEF

A hydride in which the hydrogen is deuterium.  2, record 22, English, - deuteride

Record 22,  Textual support,  French

Record number: 22, Textual support number: 1 DEF

Combinaison du deutérium avec un corps simple.  2, record 22, French, - deut%C3%A9riure

Record 22,  Textual support,  Spanish

Record 23,  Textual support,  English

Record number: 23, Textual support number: 1 DEF

carbene: Generic name for the species H2C: and substitution derivatives thereof, containing an electrically neutral bivalent carbon atom with two nonbonding electrons.  2, record 23, English, - carbene

Record number: 23, Textual support number: 1 OBS

The nonbonding electrons may have antiparallel spins (singlet state) or parallel spins (triplet state).  2, record 23, English, - carbene

Record number: 23, Textual support number: 2 DEF

carbenes: The electrically neutral species H₂C: and its derivatives, in which the carbon is covalently bonded to two univalent groups of any kind or a divalent group and bears two nonbonding electrons, which may be spin-paired (singlet state) or spin-non-paired (triplet state).  3, record 23, English, - carbene

Record number: 23, Textual support number: 2 OBS

In systematic name formation, carbene is the name of the parent hydride : CH2; hence, the name dichlorocarbene for : CCl2. However, names for acyclic and cyclic hydrocarbons containing one or more divalent carbon atoms are derived from the name of the corresponding all-[lambda subscript 4]-hydrocarbon using the suffix-ylidene.  3, record 23, English, - carbene

Record number: 23, Textual support number: 3 OBS

Use of the alternative name "methylene" [q.v.] as a generic term is not recommended.  2, record 23, English, - carbene

Record 23,  Textual support,  French

Record number: 23, Textual support number: 1 DEF

Espèce électriquement neutre H₂C: et ses dérivés dans lesquels le carbone est lié de manière covalente à deux groupes monovalents de nature quelconque ou à un groupe divalent et porte deux électrons non liants, les spins de ceux-ci pouvant être appariés (état singulet) ou non appariés (état triplet).  2, record 23, French, - carb%C3%A8ne

Record number: 23, Textual support number: 1 OBS

Dans la construction systématique des noms, carbène est le nom de l'hydrure fondamental :CH2 et, par suite, :CCl2 est dénommé dichlorocarbène. Toutefois, les noms des hydrocarbures acycliques et cycliques qui comportent un ou plusieurs atomes de carbone divalents sont dérivés des noms des hydrocarbures à carbones tétravalents correspondants en utilisant le suffixe -ylidène. Par exemple : CH2=CHCH: prop-2-én-1-ylidène, CH2=C:, éthénylidène; [...] Les sous-classes des carbènes comprennent les acylcarbènes RC(=O)CR, les imidoylcarbènes RC(=NR)CR et les vinylcarbènes.  2, record 23, French, - carb%C3%A8ne

Record number: 23, Textual support number: 2 OBS

Ne pas confondre avec le terme spécifique «méthylène» (voir cette autre fiche).  3, record 23, French, - carb%C3%A8ne

Record 23,  Textual support,  Spanish

Record 24,  Textual support,  English

Record number: 24, Textual support number: 1 CONT

One approach using a combination of microwave irradiation and metal hydride catalyst was found promising and a patent application covering this new method was prepared.  1, record 24, English, - metal%20hydride%20catalyst

Record 24,  Textual support,  French

Record number: 24, Textual support number: 1 CONT

Une méthode combinant l'irradiation par micro-ondes et l'emploi de catalyseurs à base d'hydrures métalliques s'est révélée prometteuse.  1, record 24, French, - catalyseur%20%C3%A0%20base%20d%27hydrures%20m%C3%A9talliques

Record 24,  Textual support,  Spanish

Record 25,  Textual support,  English

Record number: 25, Textual support number: 1 DEF

... the preferential reaction of a chemical reagent with one of two or more different functional group.  1, record 25, English, - chemoselectivity

Record number: 25, Textual support number: 1 OBS

A reagent has a high chemoselectivity if reaction occurs with only a limited number of different functional groups. For example, sodium borohydride is a more chemoselective reducing agent than is lithium aluminium hydride. The concept has not been defined in more quantitative terms.  1, record 25, English, - chemoselectivity

Record 25,  Textual support,  French

Record number: 25, Textual support number: 1 DEF

[...] aptitude d'un réactif chimique [...] à réagir avec un groupe fonctionnel donné plutôt qu'avec d'autres groupes fonctionnels différents.  1, record 25, French, - chimios%C3%A9lectivit%C3%A9

Record number: 25, Textual support number: 1 OBS

Un réactif a une forte chimiosélectivité lorsqu'il réagit seulement avec un nombre limité de groupes fonctionnels différents. Par exemple, le borohydrure de sodium est un agent réducteur plus sélectif que l'hydrure double d'aluminium et de lithium. Ce terme n'est pas défini plus quantitativement.  1, record 25, French, - chimios%C3%A9lectivit%C3%A9

Record 25,  Textual support,  Spanish

Record 26,  Textual support,  English

Record number: 26, Textual support number: 1 DEF

Properties : Water-white liquid with ethereal odor;... Soluble in water and organic solvents. Derivation :(1) Catalytic hydrogenation of furan with nickel catalyst.(2) Acid-catalyzed dehydration of 1, 4-butanediol. Grades : Technical; spectrophotometric.... Hazard : Moderately toxic by ingestion and inhalation. Flammable, dangerous fire risk. Tolerance, 200 ppm in air. Flammable limits in air 2 to 11. 8%. Uses : Solvent for natural and synthetic resins,... Grignard reactions, lithium aluminum hydride reductions, and polymerizations; chemical intermediate and monomer. Shipping regulations :(Rail, Air) Flammable Liquid label. Not acceptable passenger.  2, record 26, English, - tetrahydrofuran

Record 26,  Textual support,  French

Record number: 26, Textual support number: 1 DEF

Liquide incolore, odeur éthérée, [...] S'oxyde lentement à l'air en donnant des peroxydes explosifs. Miscible eau et solvants usuels. [...] Utilisation : solvant (hauts polymères, plastiques, adhésifs, encres, peintures, filature), solvant réactionnel, synthèse organique.  3, record 26, French, - t%C3%A9trahydrofurane

Record 26,  Textual support,  Spanish

Record 27,  Textual support,  English

Record number: 27, Textual support number: 1 OBS

deuteri-, comb. form. deuterium. Containing deuterium tritide : a binary compound of tritium analogous to a hydride  2, record 27, English, - deuteri%2Dtritide

Record 27,  Textual support,  French

Record number: 27, Textual support number: 1 DEF

Mélange de métal tritié et deutéré contenant l'hydrure du même métal en quantités variables.  3, record 27, French, - deut%C3%A9riotritiure

Record 27,  Textual support,  Spanish

Record 28,  Textual support,  English

Record number: 28, Textual support number: 1 CONT

One approach using a combination of microwave irradiation and metal hydride catalysts was found promising and a patent application covering this new method was prepared.  1, record 28, English, - microwave%20irradiation

Record 28,  Textual support,  French

Record number: 28, Textual support number: 1 CONT

Une méthode combinant l'irradiation par micro-ondes et l'emploi de catalyseurs à base d'hydrures métalliques s'est révélée prometteuse. Une demande de brevet pour cette nouvelle méthode a été préparée.  1, record 28, French, - irradiation%20par%20micro%2Dondes

Record 28,  Textual support,  Spanish