Bulletin of the Chemical Society of Japan p. 962 - 965 (1991)
Update date:2022-08-16
Topics:
Ito, Osamu
Hoteiya, Kiyohiko
Watanabe, Akira
Matsuda, Minoru
The reaction rate contants for halogen abstraction of Ph3Sn* and Ph3Si* have been determined by xenon-flash photolysis method.The absolute rate constants for the reactivity of Ph3Sn* with several alkyl halides have been compared with the relative ones; the agreement between the both methods was fairly good.For Ph3Sn*, the rate constant (in unit of mol-1 dm3 s-1) of n-BuCl (5.2*102) was smaller than that of n-BuBr (3.1*106) by a factor of ca. 1/104.With changing the alkyl halides, the rate constants for Ph3Si* and Ph3Sn* varied similarly, although the rate constants for Ph3Si* were larger than those for Ph3Sn* by factors of 50 - 100.The reactivity of alkyl halides increased with a decrease in the bond-dissociation energy of the R-X (X=Cl, Br).
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