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H2C=CF2 [1 record]
Record 1 - internal organization data 2001-08-10
Record 1, English
Record 1, Subject field(s)
- Chemistry
Record 1, Main entry term, English
- carbene
1, record 1, English, carbene
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
Record 1, Textual support, English
Record number: 1, 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 1, English, - carbene
Record number: 1, Textual support number: 1 OBS
The nonbonding electrons may have antiparallel spins (singlet state) or parallel spins (triplet state). 2, record 1, English, - carbene
Record number: 1, 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 1, English, - carbene
Record number: 1, 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 1, English, - carbene
Record number: 1, Textual support number: 3 OBS
Use of the alternative name "methylene" [q.v.] as a generic term is not recommended. 2, record 1, English, - carbene
Record 1, French
Record 1, Domaine(s)
- Chimie
Record 1, Main entry term, French
- carbène
1, record 1, French, carb%C3%A8ne
correct, masculine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
Record 1, Textual support, French
Record number: 1, 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 1, French, - carb%C3%A8ne
Record number: 1, 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 1, French, - carb%C3%A8ne
Record number: 1, Textual support number: 2 OBS
Ne pas confondre avec le terme spécifique «méthylène» (voir cette autre fiche). 3, record 1, French, - carb%C3%A8ne
Record 1, Spanish
Record 1, Textual support, Spanish
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