Synthesis and Characterisation of Mixed Ligand Complexes of Lanthanides

S. D. Palsokara¹, M. C. Chavanb², V. D. Deshpandec³

¹Department of Chemistry, Dharampeth Science College, Nagpur 440 010 India.

²Department of Chemistry, LAD College, Nagpur 440 010 India.

³Department of Chemistry, VRCE, Nagpur 440 010 India.

ABSTRACT:

Mixed ligand complexes of the type Ln(L₂) (L').2H₂OCI, LN(L₂") .2H₂OCI and Ln(L₂) (L₁") .2H₂O, where Ln = La (III), Pr (III). Nd (III). Sm (III). Gd (III), Dy (III). L = Ortho vanillin monoxime. L'=Diacetylmonoxime L" = 2-2* Bipyridyl and L" = N-phenylanthranilic acid, are prepared and characterised by a study of elemental analysis. Ultraviolet, visible, infrared, NMR spectral data, thermal analysis and conductivity measurements. A study of ultraviolet spectra gave an evidence about complexation. Visible spectra of Pr (III), Nd (III) and Sm(lll) complexes revealed nephelauxetic effect. The covalency parameter and 8% covalency values indicate strong interaction of lanthanide ions with the ligands. From the shift in the characteristic infrared frequencies of the free ligand bands on complexation the centres of coordination are fixed. Thermal data indicated the presence of coordinated water molecule. The molar conductance values in DMF and DMSO are indicative of 1 :1 electrolyte behaviour for O-VMO-DAMO and O-VMO-Bipyridyl mixed complexes and non electrolyte behaviour for O-VMO- NPAA complexes.

KEYWORDS:

N-phenylanthranilic; monoxime; nephelauxetic Diacetylmonoxime

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Copy the following to cite this article: Palsokara S. D, Chavanb M. C, Deshpandec V. D. Synthesis and Characterisation of Mixed Ligand Complexes of Lanthanides. Orient J Chem 1998;14(1).

Copy the following to cite this URL: Palsokara S. D, Chavanb M. C, Deshpandec V. D. Synthesis and Characterisation of Mixed Ligand Complexes of Lanthanides. Orient J Chem 1998;14(1). Available from: http://www.orientjchem.org/?p=21654