Hydrogen-abstraction reactivity of excited-state para-substituted benzyl radicals in solution at room temperature

K Tokumura, T Ozaki, M Itoh

Index: Tokumura, Kunihiro; Ozaki, Tomomi; Itoh, Michiya Journal of the American Chemical Society, 1989 , vol. 111, # 16 p. 5999 - 6004

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Citation Number: 9

Abstract

Abstract: In contrast to almost no H-abstraction reactivity of the ground-state para-substituted benzyl radicals@-X-benzyls: X= CN, CI, F, and OCH3) toward 1, 4-cyclohexadiene (CHD), a significant fluorescence quenching by CHD in hexane at room temperature was confirmed for their fluorescent excited states, which may be assigned to 2B2 for p-cyanobenzyl and 1A2 for the other three pX-benzyls. The quenching reveals a marked substituent effect: the ...