Complexes of Praseodymium(III) and Neodymium(III) Nitrate with Mepazine

Abstract

10-[(1-Methyl-3-piperidyl)methyl]phenothiazine (mepazine) is demonstrated as a bidentate ligand. Its donor sites is heterocyclic nitrogen atom and tertiary nitrogen atom of the side chain. Praseodymium(III) and neodymium(III) nitrate form the complexes with the general formula [Ln(MZ)₂(NO₃)₂]NO₃ where Ln = Pr and Nd; MZ = mepazine. These complexes have been characterized by analytical, conductance, infrared, electronic and magnetic studies. The complexes show 1:1 electrolytic behaviour. Only two of the nitrate groups are co-ordinated bidentately to the central metal ion while the other remains uncoordinated. These conclude metal complexes formed as eight-coordinated lanthanide(III) nitrate complex. The values of various bonding parameters suggest a weak covalency for metal-ligand bond.