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ARACHNOBORANE [1 record]
Record 1 - internal organization data 2003-10-29
Record 1, English
Record 1, Subject field(s)
- Chemical Elements and Compounds
Record 1, Main entry term, English
- arachno-borane
1, record 1, English, arachno%2Dborane
correct, see observation
Record 1, Abbreviations, English
Record 1, Synonyms, English
Record 1, Textual support, English
Record number: 1, 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 (BnHn2-). Those whereupon boron atoms occupy n vertices of an (n+1)-cornered closed polyhedron = nido-boranes (BnHn+4). And those clusters in which boron atoms occupy n vertices of an (n+2)-cornered closed polyhedron = arachno-boranes (BnHn+6). 2, record 1, English, - arachno%2Dborane
Record number: 1, Textual support number: 2 CONT
Varied conditions yield a multitude of polyhedral boranes. ... Structures: - Closo-boranes (BnHn2-): (Greek "closo" = cage): Complete polyhedron. - Nido-boranes (BnHn4-: (Latin "nidus" = nest): Structures lack one vertex. - Arachno-boranes (BnHn6-: "Spiderweb" structures lacking two vertices. - Hypho-boranes (BnHn8-): "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 1, English, - arachno%2Dborane
Record number: 1, Textual support number: 1 OBS
arachno-: An affix used in names to designate a boron structure intermediate between nido- and hypho-. 4, record 1, English, - arachno%2Dborane
Record number: 1, Textual support number: 2 OBS
boranes: The molecular hybrides of boron, e.g. B5H9 pentaborane(9). 4, record 1, English, - arachno%2Dborane
Record number: 1, 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 1, English, - arachno%2Dborane
Record number: 1, Textual support number: 4 OBS
An arachno-borane has a net-like structure 2). 5, record 1, English, - arachno%2Dborane
Record number: 1, Textual support number: 5 OBS
arachno-borane: The affix "arachno" must be italicized; form recommended by the IUPAC (International Union of Pure and Applied Chemistry). 5, record 1, English, - arachno%2Dborane
Record 1, Key term(s)
- arachnoborane
Record 1, French
Record 1, Domaine(s)
- Éléments et composés chimiques
Record 1, Main entry term, French
- arachno-borane
1, record 1, French, arachno%2Dborane
correct, see observation, masculine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
- arachnoborane 2, record 1, French, arachnoborane
masculine noun
Record 1, Textual support, French
Record number: 1, 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 1, French, - arachno%2Dborane
Record number: 1, 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 1, French, - arachno%2Dborane
Record number: 1, Textual support number: 2 OBS
borane : Hydrure moléculaire du bore. Par exemple : B5H9 pentaborane(9). 4, record 1, French, - arachno%2Dborane
Record number: 1, 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 1, French, - arachno%2Dborane
Record number: 1, Textual support number: 4 OBS
Un arachno-borane a une structure en toile d'araignée 2). 1, record 1, French, - arachno%2Dborane
Record number: 1, 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 1, French, - arachno%2Dborane
Record 1, Spanish
Record 1, Textual support, Spanish
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