Collect. Czech. Chem. Commun. 1983, 48, 2952-2964

A contribution to mechanism of addition of hydrogen bromide to the α,β-unsaturated system of 3-phenyl-2-propenoic acid

Otakar Červinka and Otomar Kříž

Department of Organic Chemistry, Prague Institute of Chemical Technology, 166 28 Prague 6


Rate of addition of hydrogen bromide to meta- and para-substituted 3-phenyl-2-propenoic acids I was followed by polarography and UV spectroscopy. Rate of protonation either is the overall rate determining step or is at least comparable with the rate of the subsequent nucleophile attack.