CH3MgBr in diethyl ether; benzene byproducts: tetraphenylnaphthalene; Norbornadiene-compound and Me2GeBr2 are heated at 75°C for 4 h in benzene, reaction mixture is methylated with MeMgBr in Et2O at 0°C with stirring for 0.5 h then stirring for 1 h at room temp. (Ar).; addn. of H2O and NH4Cl at 0°C, sepn., extn. of aq. phase (Et2O), removal of solvent, GC-MS anal. demonstrates the formation of Me8Ge3 and Me10Ge4 as the methylation products in ratio 1:1;

in benzene Norbornadiene-compound is heated at 70°C for 2 h in benzene with Me2GeCl2 (Ar).; identified by GC-MS anal., ratio of Me2ClGeGeMe2Cl/Me2ClGeGeMe2GeMe2Cl 6/1;

CCl4 in toluene Kinetics; At 70-90°C 7-germabenzonorbornadiene-compound is added to CCl4, filled under argon into the NMR tube, and heated in a thermostat for 3 h, thermal decompn.,; GC analysis demonstrates the presence of C2Cl6 and Me2GeCl2 in yields of 100 percent and 95 percent, Me2ClGeCCl3 is detected by (1)H NMR, tetraphenylnaphthalene is pptd. with EtOH (quant. yield);

in benzene T=70°C; 3 h;

in cyclohexane Irradiation (UV/VIS); irradn. with a low-pressure mercury lamp (254 nm) for 5h at room temp.; distn. under reduced pressure, purifn. by GLC;

in solid matrix Irradiation (UV/VIS); quartz UV cell, degassing by three freeze-pump-thaw cycles, placing the cell into a quartz windowed Dewar filled with liquid N2, irradn. with a low-pressure mercury lamp (254 nm) at 77K for 5-30min., warming to room temp., recooling to 77K, 3-MP matrix; not isolated, detd. by UV;

in benzene all manipulations under dry Ar; heating benzene soln. of 2,3-benzo-7,7-dimethyl-1,4,5,6-tetraphenyl-7-germanorborna-2,5-diene and bis(trimethylsilyl)thioketene (70°C, 3 h); preparative GLC (10percent SF-96 on Celite 545);

in tetrachloromethane T=70°C;

in benzene all manipulations under dry Ar; heating soln. of di-tert-butylthioketene and 2,3-benzo-7,7-dimethyl-1,4,5,6-tetraphenyl-7-germanorborna-2,5-diene in benzene (70°C, 2.5 h); preparative GLC (10percent SF-96 on Celite 545);

in benzene T=70°C; 3 h;