in diethyl ether; hexane byproducts: LiCl; (N2); Schlenk technique or glovebox; soln. of mixt. of Li compd. (2 equiv.) in Et2O was added dropwise to soln. of GeCl4 (1 equiv.) in hexane at-78°C; soln. was warmed to room temp. and stirred for 2 h; filtered; solvents removed (vac.); distd. (0.01 Torr, 80-90°C); elem. anal.;

in diethyl ether; hexane byproducts: LiCl; (N2); Schlenk technique or glovebox; soln. of mixt. of Li compd. (2 equiv.) in Et2O was added dropwise to soln. of SnCl4 (1 equiv.) in hexane atroom temp. and stirred for 4 h; filtered; solvents removed (vac.); oily residue filtered; filtered-off residue washed (pentane; CH2Cl2); dried (vac.); recrystd. (pentane and Et2O); elem. anal.;

in diethyl ether; hexane byproducts: LiCl; (N2); Schlenk technique or glovebox; soln. of mixt. of Li compd. (2 equiv.) in Et2O was added dropwise to soln. of SnCl4 (1 equiv.) in hexane atroom temp. and stirred for 4 h; filtered; solvents removed (vac.); oily residue filtered; filtered-off residue washed (pentane; CH2Cl2); dried (vac.); recrystd. (pentane and Et2O); elem. anal.;