1: With tert.-butyl lithium in tetrahydrofuran; pentane T=-78°C; 0.5 h; 2: With tetrachlorosilane in tetrahydrofuran; pentane T=-78 - 20°C; 6 h;

naphthalenyllithium in ethylene glycol dimethyl ether soln. of dichlorodimesitylsilane and 1,2-dichlorotetramesityldigermane in dry DME is added to a cold (dry ice/acetone) suspension of lithium naphthalenide, stirred at -78°C (1 h); warmed to room temp. over 24 h; acidified (1 N HCl); extd. (Et2O); crystd. (hexane); not sepd.; NMR;

1: Li / tetrahydrofuran / 0.33 h / Irradiation; utrasonic waves; further conditions - controlled-potential conditions 2: 0.3 g / tetrahydrofuran / 0.5 h / 45 °C View Scheme

lithium perchlorate in tetrahydrofuran Ambient temperatureMg cathode and anode, undivided cell, 5F/mol;