Mercury-sensitized photolysis of Me2SiH2 The disproportionation reactions of the Me2SiH radical
- 1 January 1997
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions
- Vol. 93 (6) , 1071-1078
- https://doi.org/10.1039/a605762d
Abstract
Mercury-sensitized photolysis of Me 2 SiH 2 yields in the primary step an Me 2 HSi radical and an H atom with a quantum yield of one. The Me 2 HSi radicals undergo a combination reaction [k(2)] as well as two kinds of disproportionation reactions leading to dimethylsilylene [k(3)] and 1-methylsilaethene [k(4)]. The following branching ratios have been determined: k(3)/[k(2)+k(3)+k(4)]=0.64 ±0.10 and k(4)/[k(2)+k(3)+k(4)]0.007. For Me 3 Si radicals the branching ratio for disproportionation was also determined and a value of 0.063 was obtained.Keywords
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