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    • Studies on 4f-metal(III) complexes of N-thiophene-2-carboxamidosalicylaldimine

      B Singh P K Singh V P Tiwari

      Volume 103 Issue 6 December 1991 pp 701-706

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/jcsc/103/06/0701-0706

    • Keywords

       

      Lanthanide chlorides; N-thiophene-2-carboxamidosalicylaldimine complexes; tridentate ligand; hexa-coordinated lanthanide complexes

    • Abstract

       

      N-(thiophene-2-carboxamido) salicylaldimine (H2TCS) reacts with lanthanide chlorides in the presence of KOH to give complexes of the type K(Ln(TCS)2] [Ln=La(III), pr(III), Nd(III), Sm(III), Eu(III), Gd(III) and Dy(III)]. A tentative structure for these complexes has been suggested on the basis of molar conductance, TGA and DTA, magnetic susceptibility, electronic, infrared and1H and13C NMR data. The nephelauxetic ratio ($$\bar \beta $$), covalency (σ) and bonding parameter (b1/2) have been calculated from the electronic spectrum of the Nd(III) complex. A coordination number of six around the metal ion has been suggested.

    • Author Affiliations

       

      B Singh1 P K Singh1 V P Tiwari2

      1. Department of Chemistry, Faculty of Science, Banaras Hindu University, Varanasi - 221 005, India
      2. Department of Ceramics, Institute of Technology, Banaras Hindu University, Varanasi - 221 005, India

    • Dates

       
      Published
      December 1991
      Manuscript received
      30 April 1990
      Manuscript revised
      2 April 1991

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