LiAlH4 in anhydrous butyl ether GeCl4 is reacted with t-BuMgCl to the intermediate t-BuGeCl3, the intermediate is then reacted in n-Bu2O with LiAlH4; vac. distn. at low temp., elem. anal.;

LiAlH4 in anhydrous butyl ether Ge(OEt)4 is reacted with t-BuMgCl to the intermediate t-BuGe(OEt)3, the intermediate is then reacted in n-Bu2O with LiAlH4; vac. distn. at low temp.;