HgCl2 or HCl in ethanol refluxing soln. of educts with stirring, react. in presence of HgCl2 or dry HCl gas under N2; cooling, pptn., filtration, washing (EtOH, water, EtOH, ether), drying in vacuo, fractional crystn. (CH2Cl2-C6H6), recrystn. from light petroleum ether, (dicarbonyl complex recrystd. from CH2Cl2-MeOH);

in methanol; dichloromethane addn. of NOCl soln. to Ru complex soln.; addn. of hot methanol; vigorously stirring; pptn.; centrifuging; washing (methanol, ether); drying (vac.); keeping centrifugate, 3-4h; pptn.; centrifuging; washing (methanol, ether); drying (vac.); elem. anal.;

in toluene 0.666667 h; Inert atmosphereReflux;

triphenylphosphine in 2-methoxy-ethanol A soln. of reagents was heated under reflux for 20 min, cooled in an ice-bath;; ppt. was filtered, wshed with EtOH, H2O, EtOH again, dissolved in CH2Cl2, evapd.;;

in not given 70°C, 16 h;

in tetrahydrofuran 70°C, 16 h;

KN(Si(CH3)3)2 in benzene-d6 (inert atm.); reaction of 1 equiv. of ruthenium compd. and 4 equiv. of carbene deriv. prepd. from tetrahydropyrimidinium deriv. and KN(Si(CH3)3)2 in C6D6 at 343 K overnight; NMR monitoring;