Journal of Organometallic Chemistry

Boron Photochemistry: XV. Determination of the Hammett Substituent Constant for the p-Dimesitylboryl Group

ME Glogowski, JLR Williams

Index: Glogowski, M. E.; Williams, J.L.R. Journal of Organometallic Chemistry, 1981 , vol. 218, # 2 p. 137 - 146

Full Text: HTML

Citation Number: 28

Abstract

Hammett signal values reflect relative strengths of the combined inductive and resonance effects of substituents. Using the ionization technique, 2s well as an independent neutralization method, we found the (Tu value for the p-di- mesitylboryl group to be 0.42 as compared to 0.78 for the p-nitro group. The value of o,,n = 0.65 + 0.03 determined from pi-electron interaction processes, such as absorption spectra and pi complex formation, is felt to relate better to ...