hydrogen bromide in water at 0°C, 0.5 h in N2 atmosphere;

H3PO4; NaBD4 in water 30percent H3PO4 placed in a flask and attached to a vacuum line via a reflux condenser kept at -20°C, addn. (CF3)2GeI2 to ice-cooled acid, soln. NaBD4/H2O added over 1h (pressure maintained at 600 mbar), evolved gases collected (2 traps, -196°C); fractional condensation, isothermal distn. at 0°C (slit tube column), not isolated, detected by NMR-spect.;

H3PO4; NaBH4 in water 30percent H3PO4 placed in a flask and attached to a vacuum line via a reflux condenser kept at -20°C, addn. (CF3)2GeI2 to ice-cooled acid, soln. NaBH4/H2O added over 1h (pressure maintained at 600 mbar), evolved gases collected (2 traps, -196°C); fractional condensation, isothermal distn. at 0°C (slit tube column);

twofold excess of Cd(CH3)2; 20°C, 24 h;

addition of an excess of AgCl;;

addition of an excess of AgBr;;