Studies of Some Novel Oxomolybdenum(V) and Dioxomolybdenum(VI) Complexes of Thiophene-2- aldehyde-N(4)-phenylthiosemicarbazone

Abstract

Some novel oxomolybdenum(V) complexes of general formula [MoO(TAPT)XCl₂] and dioxomolybdenum(VI) complexes of general formula [MoO₂(TAPT)XCl] (X = Cl, NO₃, NCS or ClO₄ and TAPT = thiophene-2-aldehyde-N(4)-phenyl thiosemicarbazone) have been synthesized and characterized by elemental analysis, magnetic moment and conductance measurements, IR, ESR, electronic and NMR spectral studies. The thermal behaviour of one of the complexes has also been examined. The ligand and its few metal complexes were screened for their antibacterial activities against gram positive and gram negative bacteria and also screened for their antifungal activity. The molar conductance values of the complexes indicate that the complexes are non electrolytes. The X-band ESR spectra indicate that the pentavalent Mo in the complex [MoO(TAPT)NCS Cl₂] is monomeric in nature. The X-ray diffraction patterns of the complex [MoO₂(TAPT) NO₃Cl] has been examined and found to be orthorhombic with unit cell dimensions such as a= 10.89 Å, b = 8.12 Å and c = 7.03 Å.