pyridine in tetrahydrofuran; benzene (N2); addn. of a soln. of germanium compd. in THF to a mixt. of ligand and pyridine in benzene at room temp., stirring for 12 h; addn. of aq. HCl, sepn., washing org. layer with water, drying (Na2SO4),evapn., recrystn. (THF/Et2O); elem. anal.;