β Scribed by I. Safarik; A. Jodhan; O.P. Strausz; T.N. Bell
No coin nor oath required. For personal study only.
The reaction between CH30H or CIHSOH and 1, I-dimethylsilaethene, the disproportionation product of the trimethylsilyl radical, has been studied to establish its efficiency for quantitative measurement of the disproportionation reaction. It has been found that standing in a Pyrex vessel, in mixtures of (CH3),SiH -the usual precursor of the (CH,),Si radical -and CH30H or CZH,OH, a dark surface reaction takes place giving HI, (CH3)$iSi(CH3), and (CH3)$iOR. Using the Hg( )P,) photosensitization of ( CH3)2SiH asa source of (CH,)$i radicals in the presence of IO-20 Torr CH,OH or lOTorrC,H,OH, the (CH,),SiOR product yield increased linearly with increasing photolysis time but did not vanish when extrapolated to zero time. After minimizing this interfering dark reaction and applying a correction for its contribution we determined the value k,/k, =O. 10 + 0.0 I for the disproportionation-combination reactions of the trimethylsilyl radical.
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