Laser flash photolysis determination of absolute rate constants for reactions of bromine atoms in solution
…, M Krzywinski, R Sinta, G Calabrese
Index: Scaiano; Barra; Krzywinski; Sinta; Calabrese Journal of the American Chemical Society, 1993 , vol. 115, # 18 p. 8340 - 8344
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Citation Number: 46
Abstract
Abstract: The photodecomposition of vicinal dibromides at 266 nm produces bromine atoms with a quantum yield of-2.0. This results from an efficient primary photocleavage of a C-Br bond, followed by rapid elimination of a second bromine atom from radicals of the type RCH- CH2Br. This cleavage occurs with a lifetime of< 20 ns at room temperature. Bromine atoms react with bromine ions with a rate constant of 1.6 X 1010 M-1 s-1 to yield Brz*-, an easily ...
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