Difference between revisions of "Carbanion"

Latest revision as of 19:27, 4 November 2013

Carbanion
IUPAC RECOMMENDATIONS 2013
Even-electron anion with a significant portion of the excess negative charge located on a carbon atom that usually has three substituent groups and an unshared pair of electrons for a total of eight valence electrons, with general formula R₁R₂R₃C^- where the R groups are any organic structure.
Related Term(s):
Reference(s): IUPAC. Compendium of Chemical Terminology, 2nd ed. (the Gold Book). Compiled by A. D. McNaught and A.Wilkinson. Blackwell Scientific Publications, Oxford (1997). XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins.
From Definitions of Terms Relating to Mass Spectrometry (IUPAC Recommendations 2013); DOI: 10.1351/PAC-REC-06-04-06 © IUPAC 2013.
Index of Recommended Terms

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-|def=[[Carbocation]] that has at least one important contributing structure containing a tervalent carbon atom with a vacant p-orbital. Common examples are even-electron hypovalent ions with the charge formally localized on a carbon atom, with general formula R<sub>1</sub>R<sub>2</sub>R<sub>3</sub>C<sup>+</sup> where the R groups are any monovalent organic structure.
+|def=Even-electron anion with a significant portion of the excess negative charge located on a carbon atom that usually has three substituent groups and an unshared pair of electrons for a total of eight valence electrons, with general formula  R<sub>1</sub>R<sub>2</sub>R<sub>3</sub>C<sup>-</sup> where the R groups are any organic structure.
-:Note: In earlier literature, such [[ion]]s were referred to as [[carbonium ion]]s. Both types are collectively referred to as carbocations.
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-|ref=Revised from
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