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Organophosphonic acids as complexones, part III:o-phenylenediamine-N,N,N′,N′-tetrakis- and ethylenediamine-N,N′-bis-(methylenephosphonic) acids as complexing agents

  • N Palta
  • B Venkateswara Rao
  • S N Dubey
  • D M Puri
Inorganic and Analytical

Abstract

Polynuclear metal derivatives ofo-phenylenediamine-N,N,N′,N′-tetrakis-(methylenephosphonic)acid (pdtmp, H8L) have been prepared in aqueous medium. The general formula of derivatives from elemental analysis is M4xH2O [M=Mn(II), Co(II), Ni(II), Cu(II), Zn(II), Cd(II) and Pb(II);x=2–8]. Ethylenediamine-N,N′-bis(methylenephosphonic) acid (edbmp) complexes of iron(III) Fe3(OH)L2·9H2O, Fe2(OH)2L·H2O have also been studied. The electronic spectra have shown them to be six coordinated with slight distortion from octahedral geometry. Antiferromagnetism has been inferred from magnetic moment data. Infrared spectral studies have been carried out to determine coordination sites.

Keywords

Metal organopolyphosphonates coordination sites six coordinate 

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Copyright information

© Indian Academy of Sciences 1985

Authors and Affiliations

  • N Palta
    • 1
  • B Venkateswara Rao
    • 1
  • S N Dubey
    • 1
  • D M Puri
    • 1
  1. 1.Department of ChemistryKurukshetra UniversityKurukshetraIndia

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