methylene dichloride; copper in neat (no solvent) N2 atmosphere; dropwise addn. of CH2Cl2 to Ge/Cu (glass wool, 200°C), warming to 380°C (2.5 h); collection in -78°C-trap, volatiles removal, fractional distn.; MeGeCl3/Me2GeCl2 mixt. (4:1) not sepd. (yield 15percent);

HCl in diethyl ether; water byproducts: H2; N2 atmosphere; stirring (room temp., 20 h), hydrolysis (dild. HCl); further products formed (GC/MS); drying of org. phase (Na2SO4), solvent removal, crystn. of (GeH2CH2)3 on cooling (-22°C), isolation of (GeH2CH2)2GeH2 by preparative GC;