The effects of substituents on the rate of saponification of biphenyl-4-carboxylates
- 1 January 1984
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Perkin Transactions 2
- No. 1,p. 35-37
- https://doi.org/10.1039/p29840000035
Abstract
Second-order rate constants have been measured for the saponification of methyl 2′-, 3′-, and 4′- substituted biphenyl-4-carboxylates at several temperatures in 85%(w/w) methanol–water and activation parameters have been calculated. The Hammett equation applies very well to the saponification of 3′-and 4′-substituted biphenyl-4-carboxylates with σ-constants evaluated by the FMMF method. The effect of 2′-substituents is understandable in terms of π-electron steric effects.Keywords
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