(CF3SO2)2NLi in tetrahydrofuran Electrolysis; electrolysis (1 F/mol) with Mg anode under inert atm. at room temp. at 0.15 A/dm**2; after electrolysis, solvent evapd. under vac.; slowly hydrolysed at 0°C with soln. of H2SO4 until pH 5; purified by column chromy. on silica gel (pentane/ether);
