in tetrahydrofuran byproducts: NaCl; addn. of Na2(Cr2(CO)10) to (Cr(CO)5PCl3) in THF at -78°C, stirring for 1 h and slow warming to room temp.; evapn. (vac.), dissolving in benzene, filtn. (NaCl), evapn., dissolving in CH2Cl2, treating with silica gel, drying (vac.), column chromy. on silica gel, elution with n-hexane-toluene and extn. of the residue with n-pentane;

in tetrahydrofuran byproducts: graphite, KCl; (argon); stirring (-78°C, 1 h), warming to room temp.; filtration, evapn., chromy. (SiO2; n-hexane and n-hexane/toluene); elem.anal.;

in tetrahydrofuran byproducts: KCl; react. of (Cr(CO)5(THF)) and PCl3 at room temp. in THF, addn. of the Mo compd. at -78°C, stirring for 1 h and slow warming to room temp.; evapn. (vac.), dissolving in benzene, filtn., evapn., dissolving in CH2Cl2, treating with silica gel, drying (vac.), column chromy. on silica gel, elution with n-hexane-toluene, recrystn. from n-pentane, evapn. and sublimation at 120°C/0.000 Torr;

in tetrahydrofuran byproducts: KCl; (argon); stirring (-78°C, 1 h), slow warming to room temp.; solvent removal, redissoln. (toluene), filtration, evapn. (vac.), chromy. (SiO2; n-hexane and CH2Cl2/n-hexane); elem. anal.;

in solid matrix Irradiation (UV/VIS); Ar-matrix, 10 K, 229 - 366 nm; not isolated, detd. by IR spectroscopy;