MERCURY-SENSITIZED PHOTOLYSIS OF ME(2)SIH(2) - THE DISPROPORTIONATIONREACTIONS OF THE ME(2)SIH RADICAL

Authors
KERST C POTZINGER P
Citation
C. Kerst et P. Potzinger, MERCURY-SENSITIZED PHOTOLYSIS OF ME(2)SIH(2) - THE DISPROPORTIONATIONREACTIONS OF THE ME(2)SIH RADICAL, Journal of the Chemical Society. Faraday transactions, 93(6), 1997, pp. 1071-1078
Citations number
34
Categorie Soggetti
Chemistry Physical","Physics, Atomic, Molecular & Chemical
Journal title
Journal of the Chemical Society. Faraday transactions → ACNP
ISSN journal
09565000
Volume
93
Issue
6
Year of publication
1997
Pages
1071 - 1078
Database
ISI
SICI code
0956-5000(1997)93:6<1071:MPOM-T>2.0.ZU;2-I
Abstract
Mercury-sensitized photolysis of Me(2)SiH(2) yields in the primary ste p an Me(2)HSi radical and an H atom with a quantum yield of one. The M e(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)] greater than or equal to 0.007. For Me(3)Si radical s the branching ratio for disproportionation was also determined and a value of 0.063 was obtained.