Syntheses de Phenylalcoxy et Phenylalcoylthio- Germanes et Polygermanes par Reactions D'Echange

The use of exchange reactions Ge-X/Ge-Y (X = halogen; Y = MeO, MeS) between phenylhalogermanes or polygermanes and functional trialkylgermanes may give selectively and quantitatively various substituted phenylgermanes and polygermanes. These reactions are readily adapted to the synthesis of X 2 (Y)GeH, Ph(X)(Y)GeH, PhY 2 GeGeY 2 Ph, (PhY 2 Ge) 2 Ge(Y)Ph, (PhY 2 Ge) 3 GePh derivatives which may not be obtained by direct action of organometallic compounds YM (M = Li, Na, MgX) in basic solvents. Germanium-hydrogen bonds also give similar exchange reactions of the Ge-H/Ge-Y type; but these latter reactions probably are of the radical type and always lead to equilibria.