Tetrahedron letters

Reactions at high pressure, part 18; volumes of activation and of reaction for the wittig reaction

NS Isaacs, OH Abed

Index: Isaacs, Neil S.; Abed, Obeid Hassan Tetrahedron Letters, 1986 , vol. 27, # 8 p. 995 - 996

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Citation Number: 8

Abstract

Abstract Volumes of activation have been obtained from rate measurements between 1 and 1000 bar of reactions between triphenyl-p-nitrobenzylidenephosphorane, and a series of substituted benzaldehydes. Values of ΔV≠ lie in the range− 20 to− 30 cm 3 mol− 1 and are somewhat solvent-dependent. The corresponding volume of reaction is less negative. These measurements are in agreement with the accepted reaction mechanism and suggest that ...