XeF2 in dichloromethane T=-20°C; Fluorination; 0.5 h;

liquid NH3; Li in tetrahydrofuran 100 mL liquid NH3 added to diselenide, to this stirred soln. lithium added until soln. was slightly blue, solvent evaporated under Ar, remaining NH3 removed under vacuum, THF added, soln. of Me3GeCl in THF added at room temp. under Ar, stirred for 3 h; THF removed at normal pressure, product distilled from react. flask, redistilled, aqueous phase treated with ether, washed, dried, solvent removed, product purified by column chromy.;

in neat (no solvent) excess of Ge-compd., room temp.; low-temp. fractionation;

in benzene N2-atmosphere; 3 equiv. of ligand, 8-10°C, 1-2 days (to beginningof formation of tricarbonyl-complex); filtration, evapn. (below 5°C), dissoln. in cold Et2O, cooling to-80°C (crystn. of excess ligand), filtration, evapn. of filtrate , dissoln. in pentane (-20°C), crystn. (below 0°C); elem. anal.;

in dichloromethane ethylselenotrimethylgermane react in CH2Cl2 at -20°C with XeF2 in a molar ratio 1:1 for 20 min, mixt. reacted with PrCCPr at -20°C for 1 h and then at room temp. for 1 h; Me3GeF not isolated (detected by (19)F-NMR);