carbanion

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Related to carbanions: Carbenes, Free radicals

carb·an·i·on

(karb-an'ī-on),
An organic anion in which the negative charge is on a carbon atom; the specific names are formed by adding -ide, -diide, etc., to the name of the parent compound; for example, methanide, (CH3)-.
Farlex Partner Medical Dictionary © Farlex 2012

carbanion

An anion with a negatively charged carbon and a pair of unshared electrons.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

carbanion

(kăr-băn′ī-ŏn)
A carbon ion with a negative electrical charge.
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
The key components of an MA system are electron deficient C=C double bonds (e.g., an acryloyl, the acceptor), acidic C-H bonds (as present in aceto-acetate and malonate moieties, the donor), and a base catalyst strong enough to abstract the proton of this C-H bond yielding a nucleophilic carbanion that can add to the double bond.
In the case of the Michael addition, the carbanion would react with Michael acceptors or [alpha],[beta]-unsaturated compounds to yield polyfunctionalised nitroderivatives [6].
This issue covers reactions of aldehydes and ketones and their derivatives; reactions of carboxylic, phosphoric and sulfonic acids and their derivatives; oxidation and reduction; carbenes and nitrenes; nucleophilic and electrophilic aromatic substitution; carbocations; nucleophilic aliphatic substitution; carbanions and electrophilic aliphatic substitution; elimination reaction; addition reactions (polar addition and cycloaddition); and molecular rearrangements.
This system performs temperature-sensitive reactions including carbohydrate chemistry, the formation of carbanions, and other highly reactive intermediates.
In conjunction with butadiene monomer, such an organolithium based system produces allylic carbanions that are unique in terms of their structure, reactivity and solvency.