Reactions of Cl(2)MeSiSiMeCl(2) with RMgCl make it possible to obtain
and isolate pure disilanes containing a smaller number of functional g
roups, namely, RMeClSiSiMeCl(2) (R = Ph), RMeClSiSiMeRCl (R = Pr-i, Ph
), and R(2)MeSiSiMeRCl (R = Bu(i)). The reaction of Cl(2)MeSiSiMeCl(2)
with Bu(n)MgCl is the feast selective. The chlorides obtained were re
duced with LiAlH4 into the corresponding hydrides.