New Metal Complexes Derived from 1-N-(6-Nitrobenzimidazole-1-carbonylmethyl)-4-(α-naphthyl)-3-thiosemicarbazide

Abstract

The synthesis and characterization of Mn(II), Cu(II), Co(II), Ni(II), Pb(II) and UO₂ (VI) complexes of the new ligand 1-N-(6-nitrobenzimidazole-1-carbonylmethyl)-4-(α-naphthyl)-3-thiosemicarbazide (NBNMS) is reported. Infrared spectral data show that NBNMS behaves as a tetradentate ligand involving the carbonyl and thiocarbonyl groups in conjunction with the adjacent nitrogen atoms (C = N groups). Each ligand bridges to two metal centers. This result in polymers that grow through consecutive ligand-metal linkages for all but UO₂ (VI). In contrast, NBNMS acts as a monobasic tridentate ligand with UO₂(VI).