magnesium in diethyl ether stirring (over night, room temp.), rapidly addn. of germanium-complex, stirring (8 h), decantation (ice bath), quenching (NH4Cl); organic layer sepn., washing (water, sodium bicarbonate, water), drying (MgSO4), solvent removing (evapn.), chromy. work up (silica, hexane); elem. anal.;

in hexane Irradiation (UV/VIS); (Ar); photolyzis (1 h); solvent removing (evapn.), gas chromy.;

in perdeuterocyclohexane byproducts: C2H4, C3H6; Irradiation (UV/VIS); photolysis at 254 nm of germanium compd. in cyclohexane-d12 in presence of acetic acid; NMR and GC/MS;

in perdeuterocyclohexane byproducts: C2H4, C3H6; Irradiation (UV/VIS); photolysis at 254 nm of germanium compd. in cyclohexane-d12 in presence of butadiene deriv.; NMR and GC/MS;