[CH:1]([Si:4]([CH:7]([CH3:9])[CH3:8])(Cl)[Cl:5])([CH3:3])[CH3:2].C([Si](C(C)C)(OC)[O:14][CH3:15])(C)C>>[CH:1]([Si:4]([CH:7]([CH3:9])[CH3:8])([O:14][CH3:15])[Cl:5])([CH3:3])[CH3:2]A 500 ml-capacity, four-necked flask was charged with 18.5 g (0.1 moles) of diisopropyldichlorosilane and 17.6 g (0.1 moles) of diisopropyldimethoxysilane, and the resulting mixture was stirred at 20° C.-30° C. for 1 hour. There occurred a disproportionation reaction, thus giving a mixture comprising diisopropylmethoxychlorosilane, the unreacted diisopropyldichlorosilane and the unreacted diisopropyldimethoxysilane.
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