n-butyllithium in hexane T=-78 - 25°C;

n-butyllithium in tetrahydrofuran; hexane T=-78 - 25°C;

in neat (no solvent) High Pressure; (Ar); addn. of GeCl4 to tin compd., heating to 150°C for 12 h in a sealed tube, cooling to room temp.; dissolving in CH2Cl2, vac. distn.;