in benzene React. of 3 equiv of org. compd. with stirred suspn. of Mo-complex in benzene (25°C, inert-atmosphere).; Removal of benzene, unreacted phosphine and mes after 48 h in vac., dissolving of resulting materials in benzene and passing of soln. through alumina column. Removal of benzene (vac.) gives pure complex as viscous oil.; elem. anal.;

in dichloromethane React. of Mo-complex (CH2Cl2) with 2 equiv of org. compd. (25°C, 6 h).; Removal of solvent, unreacted phosphine and pip (vac.); redissoln. of resulting oil (C6H6), passing of soln. through Al2O3 column. Upon removal of solvent, a viscous oil is obtained, which did not crystallize from various solvents.;