反应详情

Utilizing the apparatus of Examples 1-5, 100 millimoles of potassium chloride, 100 millimoles of tri-n-octylaluminum, and 98 millimoles of methyltrichlorosilane were reacted at 180° C. for 4 hours. The analyses utilized in Examples 1-5 revealed that only 8.3% mole percent methyltrioctylsilane was produced as compared with 63-66 mole percent methyltrioctylsilane that was produced using comparable conditions but adding sodium chloride (compare Examples 8 and 9 from Table II). The major product, methyldioctylsilane was produced in a 47.2 weight percent yield. Product was identified by characteristic infrared Si--H found at 2100 cm-1 ; independent synthesis by reaction of methyldichlorosilane with two equivalents of n-octyl-magnesium bromide; and conversion under hydrosilylation conditions with octene to methyltrioctylsilane. This clearly demonstrates a different mode of action for sodium chloride versus potassium chloride.

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