[SiH:1]([CH2:6][CH3:7])([CH2:4][CH3:5])[CH2:2][CH3:3].[CH3:8][SiH:9]([Cl:11])[Cl:10].[CH2:12]([Cl:16])[C:13](=[CH2:15])[CH3:14]>>[CH3:8][Si:9]([CH2:14][CH:13]([CH2:12][Cl:16])[CH3:15])([Cl:11])[Cl:10].[Si:1]([CH2:14][CH:13]([CH2:12][Cl:16])[CH3:15])([CH2:6][CH3:7])([CH2:4][CH3:5])[CH2:2][CH3:3]In a 100 ml apparatus, there were combined 11.6 g (0.1 mol) of Et3SiH, 11.5 g (0.1 mol) of MeSiHCl2, and 9.1 g (0.1 mol) of methallyl chloride. After heating to 50° C., the heat source was removed and 0.05 ml Pt catalyst solution added, causing an exothermic reaction to 83.5° C. in 4 min. The complete reaction was vacuum distilled, yielding 13.83 g (67.3%) of MeSiCl2CH2CHMeCH2Cl and 4.31 g (20.9%) of Et3SiCH2CHMeCH2Cl. This example shows that while MeSiHCl2 at the equimolar level promotes the reaction between Et3SiH and methallyl chloride, it also competes with Et3SiH, reducing the yield of Et3SiCH2CHMeCH2Cl.
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