in tetrahydrofuran byproducts: NaI; Ar atmosphere, addn. of solid GeI2 to soln. of metal complex at 20°C, stirring (20°C, 5 min), addn. of solid ligand, filtration (Kieselgur), stirring (20°C 30 min); removement of solvent (vacuum), dissolution (THF), chromy. (silica gel, elution of byproducts with Et2O, elution of main product with THF), evapn. of solvent; elem. anal.;

in tetrahydrofuran byproducts: NaI; Ar atmosphere, addn. of solid GeI2 to soln. of metal complex at 20°C, stirring (20°C, 5 min), addn. of solid ligand, filtration (Kieselgur), stirring (20°C 30 min); removement of solvent (vacuum), dissolution (THF), chromy. (silica gel, elution of byproducts with Et2O, elution of main product with THF), evapn. of solvent; elem. anal.;