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      Permanent link:
      https://www.ias.ac.in/article/fulltext/jcsc/102/03/0195-0202

    • Keywords

       

      Ferroverdin; ferriverdin; trinucleation; redox regulated isomerism

    • Abstract

       

      Synthetic ferroverdins, NaFe11(RQ)3 afford trinuclear M[Fe(RQ)3]2 upon reaction with bivalent ions (M2+). A probable bonding mode is considered. Ferric ions oxidise ferroverdin to ferriverdin, FeIII(RQ)3. Bothfac andmer isomers can be observed for ferro- and ferriverdins but at equilibrium the preferred isomers arefac for ferro- andmer for ferriverdin. Mismatch in geometry with oxidation state gets spontaneously corrected by isomerisation. Equilibrium constants, isomerisation rates, redox potentials and EPR spectra are examined. A study on the pattern of isomer population as a function of oxidation for other 3d analogues of ferro- and ferriverdin is initiated.

    • Author Affiliations

       

      Surajit Chattopadhyay1 Partha Basu1 Debashis Ray1 Samudranil Pal1 Animesh Chakravorty1

      1. Department of Ironganic Chemistry, Indian Association for the Cultivation of Science, Calcutta - 700032, India

    • Dates

       
      Published
      June 1990

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