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This topic has appeared in the English Wikipedia rankings 1 time. It first appeared on 2026-07-09 and was most recently seen on 2026-07-09.
The Kolbe nitrile synthesis, named for Hermann Kolbe, is a method for the preparation of alkyl nitriles by reaction of the corresponding alkyl halide with a metal cyanide. A side product for this reaction is the formation of an isonitrile because the cyanide ion is an ambident nucleophile. The ratio of product isomers depends on the solvent and the reaction mechanism, and can be roughly predicted by Kornblum's rule. Conditions conducive to free cyanide ions tend to give nitriles, whereas cyanometalate and hydrogen cyanide intermediates generally react to form isonitriles.
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