Abstract
The title reaction has been investigated in the temperature range 561–627 K. The principal products were trichlorosilyl iodide and hydrogen iodide, although small quantities of hydrogen were also formed. The rate law [graphic omitted] was obeyed over a wide range of iodine and trichlorosilane pressures. This expression is consistent with an iodine atom abstraction mechanism and for the step I˙+ Cl3SiH [graphic omitted] Cl3Si˙+ HI log(k1/dm3 mol–1 s–1)=(10.92 ± 0.06)–(89.6 ± 0.7 kJ mol–1)/RT ln 10 has been deduced. From this the bond dissociation energy D(Cl3Si—H)=(382 ± 6) kJ mol–1(91.3 kcal mol–1) is obtained. The kinetic and thermochemical implications of this value are discussed.
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Schedule a callMore From: Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
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