in neat (no solvent) passing equimolar amts. of GeCl4 and GeBr4 through tube heated to 600 °C;; distillation at 112 °C (decompn. in GeCl4 and GeBr4);;

in neat (no solvent) byproducts: SnBr3Cl; investigation of GeCl4-SnBr4 mixt. by raman spectroscopy (halogen exchange);;

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) investigation of liq. GeBr4-GeCl4 mixt. by raman spectroscopy;;

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