n-butyllithium

in diethyl ether; hexane byproducts: LiCl; (N2); Schlenk technique or glovebox; soln. 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 4 h; filtered; solvents removed (vac.); oily residue filtered; distd. (0.01 Torr, 85°C); filtered-off residue washed (hexane); elem. anal.;

in diethyl ether; hexane byproducts: LiCl; (N2); Schlenk technique or glovebox; soln. 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 4 h; filtered; solvents removed (vac.); oily residue filtered; distd. (0.01 Torr, 85°C); filtered-off residue washed (hexane); elem. anal.;

in diethyl ether; hexane byproducts: LiCl; (N2); Schlenk technique or glovebox; soln. of Li compd. (2 equiv.) in Et2O was slowly added to soln. of SnCl4 (1 equiv.) in hexane at -78°C; soln. was warmed to room temp. and stirred for 5 h; filtered; solvents removed (vac.); oily residue filtered; distd. (vac.);filtered-off residue washed (hexane); dried (vac.); recrystd. (Et2O); e lem. anal.;