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Nāgpur, India

Chavan M.C.,Lad College | Vaidya P.V.,P.A. College | Lokhande N.R.,P.A. College | Palsokar S.D.,P.A. College | Ghoshal M.N.,Skporwal College
Research Journal of Pharmaceutical, Biological and Chemical Sciences | Year: 2011

Nine coordinate mixed ligand complexes of praseodymium (III) using benzoin- α-oxime, vanillin monoxime, N-phenylanthranilic acid as the primary ligands and phenyl derivatives of urea and thiourea as the secondary ligands, have been synthesised. The values of inter electronic repulsion parameters i.e. Slater-Condon (F K), Racah (E K) and Spin-orbit interaction referred as Lande parameter (ξ 4f) and intensity parameters have been calculated from their electronic spectral data. Using F 2 values the nephelauxetic ratio (β), bonding parameter (b 1/2), Sinha's parameter (δ%) and covalency angular overlap parameter (η) have been calculated which give useful information regarding bonding in these complexes. The effect of screening terms is also discussed.


Chavan M.C.,Lad College | Vaidya P.V.,Lad College | Lokhande N.R.,Lad College | Lokhande N.R.,P.A. College | And 2 more authors.
Asian Journal of Chemistry | Year: 2010

The electronic spectra of the mixed ligand complexes of praseodymium(III) with vanillinmonoxime, benzoin-α-oxime as the primary ligand and diacetylmonoxime, N-phenylanthranillic acid, 8-hydroxyquinoline, bipyridyl, N-phenylthiourea and thiourea as the secondary ligands have been studied. The values of interelectronic repulsion parameters i.e., Slater-Condon (FK), Racah (EK) and spin-orbit interaction referred as Lande parameter (ζ4f) and intensity parameters have been calculated from their electronic spectral data. Using F2 values the nephelauxetic ratio (β), bonding parameter (b1/2), Sinha's parameter (δ%) and covalency angular overlap parameter (η) have been calculated which give useful information regarding bonding in these complexes. The effect of screening terms is also calculated.

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