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UNSATURATED COMPOUND [10 records]

Record 1 2011-08-23

English

Subject field(s)
  • Chemical Elements and Compounds
Universal entry(ies)
CnH2n-2
formula, see observation
DEF

A chemical compound which belongs to a class of unsaturated hydrocarbons of the homologous series and whose structural formula contains a triple bond.

OBS

Generic chemical formula: CnH2n-2

French

Domaine(s)
  • Éléments et composés chimiques
Entrée(s) universelle(s)
CnH2n-2
formula, see observation
DEF

Nom générique de hydrocarbures dérivant des alcanes, contenant une triple liaison C=C [...]

OBS

Formule chimique générale : CnH2n-2

Spanish

Campo(s) temático(s)
  • Elementos y compuestos químicos
Entrada(s) universal(es)
CnH2n-2
formula, see observation
DEF

Hidrocarburo insaturado de la serie homóloga [...] y cuya fórmula estructural contiene un triple enlace.

OBS

Fórmula química genérica: CnH2n-2

Save record 1

Record 2 2011-01-12

English

Subject field(s)
  • Chemical Elements and Compounds
  • Biochemistry
Universal entry(ies)
C4H5N
formula, see observation
C4H4NH
formula, see observation
DEF

A heterocyclic nitrogenous compound [which] is an unsaturated five-sided ring... considered to be a resonance hybrid.

OBS

Pyrroles readily combine with such metals as iron, copper, and nickel, which accounts for their importance in the formation of such biochemically essential complexes as porphyrins.

OBS

Chemical formula: C4H5N or C4H4NH

French

Domaine(s)
  • Éléments et composés chimiques
  • Biochimie
Entrée(s) universelle(s)
C4H5N
formula, see observation
C4H4NH
formula, see observation
DEF

Composé hétérocyclique azoté [...] à cycle pentagonal.

OBS

Le noyau du pyrrole se retrouve dans de nombreux produits naturels : pigments biliaires, porphyrines, etc.

OBS

Formule chimique : C4H5N ou C4H4NH

Spanish

Save record 2

Record 3 2010-02-18

English

Subject field(s)
  • Chemical Elements and Compounds
  • Petrochemistry
CONT

A process for making a polymer of acrylonitrile, methacrylonitrile and olefinically unsaturated monomers. ... A process for making a thermally stable melt processable acrylonitrile/methacrylonitrile/olefinically unsaturated multipolymer, comprising polymerizing a mixture of acrylonitrile monomer, methacrylonitrile monomer, and olefinically unsaturated monomer in which the rate of addition of the multimonomer mixture isset by the rate of polymerization so that the concentration of unreacted acrylonitrile monomer, unreacted methacrylonitrile monomer and unreacted olefinically unsaturated monomer is low and the polymerization process is in a monomer starved condition.

CONT

Process for the free-radical polymerisation of at least one olefinically unsaturated monomer, the polymerisation being performed in the presence of a compound for effecting molecular weight control, being a CoII chelate of formula(I), wherein each group X is a divalent group which forms with the two carbon atoms to which it is bonded a pericondensed polycyclic group, being a group having 3 or more carbocyclic rings where the oxime-containing carbocyclic ring has carbon atoms in common with 2 or more of the other rings, said polycyclic group being unsubstituted(apart from the oxime groups) or having at least one hydrocarbyl substitutent;...

French

Domaine(s)
  • Éléments et composés chimiques
  • Chimie du pétrole
DEF

Monomère réalisé à partir de carbure éthylénique. [Renseignement obtenu du vérificateur à Consommation et Corporations, en 1985]

CONT

Procédé destiné à la polymérisation radicalaire libre d'au moins un monomère alcénique, cette polymérisation étant réalisée en présence d'un composé servant à obtenir une régulation de poids moléculaire, ce composé pouvant être un chélate de CoII de la formule (I), dans laquelle chaque groupe X est un groupe divalent formant avec les deux atomes de carbone auxquels il est lié un groupe polycyclique péricondensé, lequel groupe possède au moins trois cycles carbocycliques dans lesquels le cycle carbocyclique contenant des oximes possède des atomes de carbone en commun avec au moins deux des autres cycles, n'est pas substitué (à l'exception des groupes d'oximes) ou possède au moins un substituant hydrocarbyle; [...]

Spanish

Save record 3

Record 4 2002-04-11

English

Subject field(s)
  • Analytical Chemistry
  • Chemical Elements and Compounds
DEF

The use of ozone as a tool in analytical chemistry to locate double bonds in organic compounds, and a similar use in synthetic organic chemistry for preparing new compounds. Under proper conditions, ozone attaches itself at the double bond of an unsaturated compound to form an ozonide...

French

Domaine(s)
  • Chimie analytique
  • Éléments et composés chimiques
CONT

A partir des fragments d'ozonolyse, on reconstitue aisément la formule de l'alcène; aussi l'ozonolyse est-elle souvent employée pour élucider la structure des composés organiques naturels.

Spanish

Campo(s) temático(s)
  • Química analítica
  • Elementos y compuestos químicos
Save record 4

Record 5 1999-02-11

English

Subject field(s)
  • Chemistry
OBS

aliphatic: one of the major groups of organic compounds characterized by straight- or branched-chain arrangement of the constituent carbon atoms. Aliphatic hydrocarbons are comprised of three subgroups: (1) paraffins (alkanes), all of which are saturated and comparatively unreactive, ... (2) olefins (alkenes or alkadienes) which are unsaturated and quite reactive; (3) acetylenes (alkynes) ....

OBS

See records "aliphatic" and "unsaturated compound".

French

Domaine(s)
  • Chimie
OBS

composé aliphatique : composé organique renfermant une chaîne ouverte, comme les corps gras.

OBS

voir fiches "composé aliphatique" et "composé non saturé".

Spanish

Save record 5

Record 6 1999-02-11

English

Subject field(s)
  • Chemistry
DEF

Of a chemical compound, the state in which not all the available valence bonds along the alkyl chain are satisfied; in such compounds the extra bonds usually form double or triple bonds(chiefly with carbon). Thus unsaturated compounds are more reactive than saturated compounds, as other elements readily add to the unsaturated linkage. An unsaturated compound... has fewer hydrogen atoms or equivalent groups than the corresponding saturated compound....

French

Domaine(s)
  • Chimie
DEF

Caractère des composés organiques non saturés et, par extension, des fonctions organiques, telles que liaisons multiples, ou particularité structurale, telle que cycle, qui font qu'une molécule ne contient pas le nombre maximal d'atomes d'hydrogène compatibles avec le nombre des atomes présents de carbone, azote, oxygène, etc.

Spanish

Save record 6

Record 7 1999-02-11

English

Subject field(s)
  • Chemistry
OBS

aliphatic: one of the major groups of organic compounds characterized by straight- or branched-chain arrangement of the constituent carbon atoms. Aliphatic hydrocarbons are comprised of three subgroups: (1) paraffins (alkanes), all of which are saturated and comparatively unreactive, ...(2) olefins (alkenes or alkadienes) which are unsaturated and quite reactive; (3) acetylenes (alkynes) which contain a triple bond and are highly reactive.

OBS

See records "aliphatic" and "saturated compound".

OBS

unsaturated aliphatic compound.

French

Domaine(s)
  • Chimie
OBS

composé aliphatique : composé organique renfermant une chaîne ouverte, comme les corps gras.

OBS

voir fiches "composé aliphatique" et "composé saturé".

Spanish

Save record 7

Record 8 1999-02-09

English

Subject field(s)
  • Chemistry
DEF

Any chemical compound with more than one bond between adjacent atoms, usually carbon, and thus reactive toward the addition of other atoms at that point; for example, olefins, diolefins, and unsaturated fatty acids.

French

Domaine(s)
  • Chimie
CONT

insaturation : Caractère des composés organiques non saturés et, par extension, des fonctions organiques, telles que liaisons multiples, ou particularité structurale, telle que cycle, qui font qu'une molécule ne contient pas le nombre maximal d'atomes d'hydrogène compatibles avec le nombre des atomes présents de carbone, azote, oxygène, etc.

OBS

unsaturated : insaturé, non saturé.

OBS

insaturé : Chim. org. Non saturé. (Un hydrocarbure insaturé peut accepter plus ou moins facilement l'addition d'atomes d'hydrogène pour se transformer en hydrocarbure saturé.)

Spanish

Save record 8

Record 9 1985-03-20

English

Subject field(s)
  • Chemistry
  • Chemical Elements and Compounds
DEF

Any unsaturated aliphatic or alicyclic compound containing more than four carbon atoms in the chain and having at least two double bonds.

French

Domaine(s)
  • Chimie
  • Éléments et composés chimiques
DEF

Nom générique des hydrocarbures renfermant plusieurs doubles liaisons carbone-carbone.

Spanish

Save record 9

Record 10 1979-12-12

English

Subject field(s)
  • Chemical Elements and Compounds
CONT

[The] hydrogenation coulometer (...) is usable in analysis mainly for selective detection and determination of hydrogenatable species (...)

OBS

hydrogenation : The chemical reaction of hydrogen with another substance, generally an unsaturated organic compound, and usually under the influence of temperature, pressure, and catalysts.

French

Domaine(s)
  • Éléments et composés chimiques
DEF

Apte à subir une hydrogénation.

CONT

L'idée de principe consiste à transférer l'hydrogène contenu dans un hydrure métallique approprié à un substrat organique hydrogénable qui est mis au contact de cet hydrure.

Spanish

Save record 10

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