CH3I in diethyl ether; toluene soln. of CH3I in toluene is added to stirred room-temp. soln. of Cr(C6H2Me3)2(PMe3)2 in diethyl ether, stirring for 3 h; elem. anal.;

CH3I in diethyl ether; toluene soln. of CH3I in toluene is added to stirred room-temp. soln. of Cr(C6H2Me3)2(PMe3)2 in diethyl ether, stirring for 3 h; elem. anal.;

CO in pentane soln. of Cr(C6H2Me3)2(PMe3)2 in pentane is stirred under ambient pressure of CO for 30 min; filtn., soln. is cooled to -20°C, prisms of hexamethylbenzophenone form, elem. anal., (31)P-NMR;