Generation, reactions, and kinetics of sterically congested triplet diphenylcarbenes. Effects of bromine groups

H Tomioka, T Watanabe, M Hattori…

Index: Tomioka, Hideo; Watanabe, Tetsuya; Hattori, Makoto; Nomura, Naoki; Hirai, Katsuyuki Journal of the American Chemical Society, 2002 , vol. 124, # 3 p. 474 - 482

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Citation Number: 33

Abstract

A series of polybrominated diphenylcarbenes (DPCs) are generated by irradiation of the corresponding precursor diazomethanes, and their reactivities are investigated by means of low-temperature spectroscopies as well as laser flash photolysis. Triplet bis (2, 4, 6- tribromophenyl) carbene was shown to decay by undergoing dimerization and to have a half- life of 1 s in a degassed benzene solution at room temperature, some 6 orders of ...