in further solvent(s) addn. of SiCl4 to soln. of Li-salt (in tetraethylene glycol dimethylether, -30°C, stirring); volatile compds. removal (1E-3 Torr, 20.degrree.C), collection in trap (-196°C), fractional condensation, collection from trap at -10°C;

in further solvent(s) drropwise addn. of GeCl4 to soln. of Li-salt (-45°C, in ethyleneglycol dimethylether, stirring); filtration, not isolated, detd. by mass spectroscopy;

in further solvent(s) addn. of SiCl4 to soln. of Li-salt (in tetraethylene glycol dimethylether, -30°C, stirring); volatile compds. removal (1E-3 Torr, 20.degrree.C), collection in trap (-196°C), fractional condensation, collection from trap at -10°C;

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in dimethyl-ether in dimethyl ether and 2,5,8,11-tetraoxododecane; -100°C very quick react.; 10 min mixing; fractionation;