in tetrahydrofuran addn. of 10-fold excess of BrCCl3 to Ge-atom/THF slurry (Ar atmosphere), stirring (50°C, 20 h); GC-MS, GLC;

in gas vaporization of Ge (alumina-coated tungsten crucible, 1200-1300°C, 5E-3 Torr), introduction into flask (cooled with liq. N2 during Ge vaporization) together with vapor of org. halide, warming to room temp., standing for 1.5 h; further products; GC-MS, GLC;

in neat (no solvent) react. of evaporated Ge vapor with CBrCl3 (at 50°C for 3 h); GLC;

reaction of germanium atoms with organic halide by co-condensation under vac. at 77 K; further products; GC-MASS;