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);