in diethyl ether addn. of CF3SO2OSiMe3 to the Ru compd. in ether at -30°C (oxygen-free N2); filtn. through Celite, evapn. (vacuum), dissolving in hexane, filtn., concn. and cooling;

HCl in toluene bubbling of HCl(g) to the Ru compd. in toluene at room temp. for 1 h; evapn. (vacuum), washing with hexane and recrystn. from toluene-hexane at -30°C; elem. anal.;

HCl in diethyl ether addn. of 2 equiv HCl(g) to the Ru compd. in ether under N2 at -78°C, warming after 20 min to room temp. and stirring for 1 h; evapn. (vacuum), dissolving in toluene-hexane and cooling to -30°C;