• N Thankarajan

      Articles written in Journal of Chemical Sciences

    • Base adducts of dioxobis(acetoacetanilidato)uranium(VI)

      P Sreeman N Thankarajan

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      Uranyl complexes of the type [UO2L2B], where L is the enolate of acetoacetanilide, and B a monodentate base like pyridine, picoline, aniline or N-substituted aniline, have been synthesised and characterised by analysis, conductance and magnetic measurements, thermal, IR and NMR spectral studies. The order of thermal stability and features of IR spectra of the series have been explained. Pentagonal bipyramidal structure has been assigned for the complexes based on the NMR spectral evidence.

    • Lanthanide(III) complexes of N-salicylideneglycine and N-(2-hydroxy-1-naphthylidene) glycine

      N Thankarajan K Mohanan

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      New lanthanide(III) complexes of N-salicylideneglycine and N-(2-hydroxy-1-naphthylidene) glycine have been prepared and characterized by elemental analytical, molar conductance, and IR and UV-visible spectral data. Both the ligands (H2L) have been found to act as monobasic tridentate towards lanthanide ions, yielding complexes of the type [Ln(HL)2(NO3)] and [Ln(HL)2(Cl)(H2O)]. The spectral data reveal that the HL moiety is bonded to the central atom through its phenolic oxygen, imine nitrogen and a carboxylate oxygen, and that the nitrato group acts as bidentate. From the observed pattern of hypersensitivef-f bands, octacoordination is construed.

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