SYNTHESIS AND STRUCTURAL INVESTIGATION OF SOME MIXED-LIGAND CYANONITROSYL (MO(NO)2)(6) COMPLEXES OF MOLYBDENUM WITH SOME 2 OR 3-PYRAZOLINE-5-ONE DERIVATIVES

Novel mixed-ligand cyanonitrosyl complexes of molybdenum(0), obtained from the interaction of tetracyanodi-nLtrosylmolybdate(O) anion, [Mo(NO)2(CN)4)2-, with 3-methyl-2-pyrazoline-5-one, 3-methyl-1-phenyl-2-pyrazoline-5-one, 2,3-dimethyl-1-phenyl-3-pyrazoline-5-one, 2,3-dimethyl-1-(4-methyl-phenyl)-3-pyrazoline-5-one, 4-amino-2,3-dimethyl-1-phenyl-3-pyrasoline-5-one, 4-dimethylamino-2,3-dimethyl-1-phenyl-3-pyrazoline-5-one are described. The products, which have been characterized by elemental analyses, molar conductances, magnetic measurements and infra-red spectral studies, have the general formula [Mo (NO)2(CN)2(L)2].2H2O (where L = 2 or 3-pyrazoline-5-one derivatives mentioned above). An octahedral structure is suggested for the complexes. Molybdenum(O) has a low spin {Mo(NO)2)6 electron configuration1 in these complexes.