Polymethylated and poly (tert) butylated diphenylcarbenes. Generation, reactions, kinetics, and deuterium isotope effects of sterically congested triplet carbenes

H Tomioka, H Okada, T Watanabe…

Index: Tomioka, Hideo; Okada, Hidetsumu; Watanabe, Tetsuya; Banno, Kohji; Komatsu, Kazunori; Hirai, Katsuyuki Journal of the American Chemical Society, 1997 , vol. 119, # 7 p. 1582 - 1593

Full Text: HTML

Citation Number: 47

Abstract

Dimesitylcarbene (2a) was shown to decay by undergoing dimerization and to have a half- life of 160 ms, some 5 orders of magnitude longer-lived than diphenylcarbene. Didurylcarbene (2b) was twice as long-lived as 2a, while decamethyldiphenylcarbene (2c) decayed mainly unimolecularly by abstracting H from the o-methyl group and became shorter-lived than 2b. 2, 4, 6-Tri (tert-butyl) diphenylcarbene (14) decayed unimolecularly ...