durol in benzene byproducts: CH2(CH)2CH2; under Ar; soln. of Ge-compound, DMB and durol heated for 8 h at 87°C; ethylated with excess ethylmagnesium bromide; GLC;

in neat (no solvent) heating at 160°C for 20 h under vac.; not sepd.; GC-MS;

in diethyl ether addn. of 2,3-dimethyl-1,3-butadiene soln. to a soln. of HGeCl3 with stirring at room temp., stirring (1 h), filtn. of white solid, addn. of filtrate to a soln. of ethylmagnesium bromide under reflux, refluxing (3 h); hydrolizing with satd. NH4Cl soln., evapn. of solvent at room temp., chromy. (silica gel, hexane), GPC;

in not given byproducts: C6H5C(O)C(O)C6H5; decompn. on heating; reactn. of intermediary germylene with dimethylbutadiene at 120°C;;

in hexane Irradiation (UV/VIS); further products; irradn. with medium-pressure Hg-lamp for 2 h under Ar; preparative GLC;

in benzene Irradiation (UV/VIS); irradiating for 6 h in the presence of an excess of diene; detd. by high-pressure chromy.;