Laser flash photolysis determination of absolute rate constants for reactions of bromine atoms in solution

…, M Krzywinski, R Sinta, G Calabrese

文献索引：Scaiano; Barra; Krzywinski; Sinta; Calabrese Journal of the American Chemical Society, 1993 , vol. 115, # 18 p. 8340 - 8344

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被引用次数: 46

摘要

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 ...