SYNTHESIS AND CHARACTERIZATION OF DINITROSYL-MOLYBDENUM(0) SCHIFF-BASE COMPLEXES DERIVED FROM 1-PHENYL-3-METHYL-4-BENZOYL-5-PYRAZOLONE

Dinitrosylmolybdenum(0) Schiff base complexes derived from 1-phenyl-3- methyl-4-benzoyl-5-pyrazolone and amines such as p-anisidine m-pheniti dine, m-toluidine, o-, m- and p-phenylenediamine and benzidine were sy nthesised and characterised by elemental analysis, molar conductance, IR, UV-vis, H-1 NMR spectroscopy and cyclic voltammetry. Reactions of bi- and tetradentate Schiff base ligands with Mo(NO)2(acac)2 in 2:1 an d 1:1 ratios, respectively, gave diamagnetic trans-molybdenum(0) monon uclear complexes with the general formula trans-Mo(NO)2(L), (L = biden tate Schiff bases), trans-Mo(NO)2(L1) (L1 = tetradentate Schiff base w ith o- and m-phenylenediamine) and the ligand-bridged dinuclear comple xes trans-[Mo(NO)2(L2)]2 (L2 = tetradentate Schiff base with p-phenyle nediamine and benzidine).