Ethynylsilanes, RnSi(CCH)4-n (n = 0 to 3), can be prepared in satisfactory yields from RnSiCl4-n and HCCMgCl in tetrahydrofuran. Losses occur through (a) polymerization under the influence of the cyclic ether and (b) metallation of the ethynylsilanes to SiCCMgCl which provokes the formation of sila-acetylene chains and rings. Some of these compounds of higher molecular weight have been isolated
乙炔基
硅烷R n Si(CCH)4-n(n = 0至3),可以由R n SiCl 4-n和HCCMgCl在
四氢呋喃中以令人满意的产率制备。损失是通过(a)在
环醚的影响下聚合和(b)
乙炔基
硅烷金属化成SiCCMgCl引起的,从而促使形成
硅乙炔链和环。这些高分子量化合物中的一些已经被分离出来。