LiCl in diethyl ether stirring of a soln. of Ru-compd. in ether with COD and LiCl at room temp.; solvent removal, drying in high vac., extn. with CH2Cl2/pentane, solvent removal;

in tetrahydrofuran N2 atmosphere; stirring (1 h); filtration, removal of solvent (vac.), addn. of hexane, filtration off, washing (hexane), drying (vac.); elem. anal.;

in acetone treating a soln. of the Ru complex in acetone with 1,5-cyclooctadiene under N2, stirring (ambient temp., 5 h); evapg. solvent (vac.), extg. (CH2Cl2), evapg., recrystn. (ethanol, -30°C);

in ethanol ambient temp.; elem. anal.;

triphenylphosphine in tetrahydrofuran under an inert atmosphere; a mixt. of the Ru-complex and the ligand in THF was stirred for 2 h; solvent was removed under vac., addn. of THF at -78°C, warmed to 40°C, filtered, reduction of vol., filtered, washed with hexane, dried under vac.; elem. anal.;

in tetrahydrofuran inert atmosphere; excess of ligand, stirring for 2 h; evapn., addn. of hexane, filtration, crystn. on cooling (-78°C);