methyl-magnesium iodide in diethyl ether soln. mixed at -40-(-10)°C for 24 h; treated with aq. NH4Cl, org. phase worked up conventionally, resulting liq. treated with hexane, liq. residue concd., distilled (vac.); elem. anal.;

hydrogenchloride in hydrogenchloride refluxed for 7 h; ppt. separated and dried, GeCl4 distd. off, residue shaken with CHCl3, phthalic acid filtered off;

hydrogenchloride in diethyl ether refluxed for 1 h, filtered, concd., boiled with HCl; water removed (distn.); IR;

hydrogenchloride in diethyl ether mixture concd., benzene added, water removed (distn.), concd.; treated with HCl (concd.) at 20°C for 15 h; ppt. dried (vac.), recrystd. (Et2O/hexane); IR;

in diethyl ether Ge-compd. added to the phthalimide, mixt. boiled for 1 h, pptn. on cooling; ppt. filtered off, vac.-drying; elem. anal.;

hydrogenchloride in hydrogenchloride refluxed for 7 h; ppt. separated and dried, GeCl4 distd. off, residue shaken with CHCl3, phthalic acid filtered off;