methyl-magnesium iodide in diethyl ether (Ar); MeMgI soln. added dropwise to Ge compd., refluxed for 2 h; dioxane added, Mg salt filtered off, distd.; elem. anal.;

copper in diethyl ether addn. of CH2N2 to mixt. of GeCl4 with little Cu-powder at -60°C (stirring), standing at -60°C for 2 h, slow warming to room temp.,solvent removal, addn. of excess MeMgBr (in Et2O), refluxing for 10 h; addn. of satd. aq. NH4Cl, washing aq. layer (Et2O), drying combined org.layers (MgSO4), solvent removal, fractional distn.;

H2O (KOH) in tetrahydrofuran refluxing 23 h (agitation); distn. of the liquid phase led to a mixture of (Me2GeO)3,4 and (Me3Ge)2O (85:15);