Synthesis and spectral studies of oxomolybdenum (V) and dioxomolybdenum (VI) complexes of 1,2-dihydro-1 ,5-dimethyl-2-phenyl -4-(2,4-dihydroxyphenylazo)- 3-H -pyrazol-3-one

989-992A few oxomolybdenum(V) complexes of the formulae [MoO (RAAP)Cl2] , [MoO(RAAP)Br2] , [MoO(RAAP)(NCS)Cl], [MoO(RAAP)(NO3)Cl]. [MoO(RAAPH)zCI](ClO4)2 and dioxo molybdenum(VI) complexes of the formulae [MoO2 (RAAPH)(NCS)Cl] , [MoO2(RAAPH)(NO­3)Cl] and [MoO2 (RAAPH)2Cl] (ClO4) (where RAAPH = resorcinolazoantipyrine) have been synthesised and characterised by elemental analysis, IR, electronic, ESR, magnetic and conductance measurements. The X-ray powder diffraction pattern of one of the complexes has also been examined