in dichloromethane byproducts: C6H6; according to W. Uhlig, J. Organomet. Chem. 409 (1991) 377; under dry O2-free Ar using Schlenk techniques; HOTf (0.47 mmol) added to soln. of Ph4Ge (0.47 mmol) (0°C); warmed to room temp.; stirred overnight; volatiles removed (vac.); kept (-30°C) overnight; dried (vac.);

in chloroform-d1 byproducts: C6H6; (N2); std. Schlenk technique; acid (1 equiv.) was added to soln. of Ge compd. in CDCl3; kept at room temp. for 4 h; NMR monitoring; volatiles removed (vac.);

1: tetrahydrofuran 2: dichloromethane View Scheme

in dichloromethane T=-70°C; KineticsRate constant;