• Ruthenium, osmium and rhodium complexes of polypyridyl ligands: Metal-promoted activities, stereochemical aspects and electrochemical properties

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    • Keywords

       

      2,4,6-Tris(2-pyridyl)-1,3,5-triazine; Metal-assisted reactions; ruthe-nium(II), osmium(II) and rhodium(III)/(II) complexes; Crystal structure; Electro-chemistry

    • Abstract

       

      This article presents a brief overview of the reactions of2,4,6-tris(2-pyridyl)-1,3,5-triazine (tptz) in presence of rhodium(III), ruthenium(II) and osmium(II) under various experimental conditions. Under certain experimental conditions tptz exhibits metal-assisted hydrolysis/hydroxylation at the triazine ring. However, synthetic methods have also been developed to prepare complexes with intact tptz. Molecular structures of some of the complexes, especially stereoisomers of the hydroxylated products, are established by single crystal X-ray studies. A critical analysis of all data suggests that the electron-withdrawing effect of the metal ion (L→Mσ donation) is the predominant factor, rather than angular strain, that is responsible for metal-promoted reactivities. Electrochemical properties of all of these complexes have been investigated, Rh(III) complexes are excellent catalysts for electrocatalytic reduction of CO2, and dinuclear Ru(II) and Os(II) complexes exhibit strong electronic communication between the metal centres.

    • Author Affiliations

       

      Parimal Paul1

      1. Discipline of Silicates and Catalysis, Central Salt and Marine Chemicals Research Institute, G B Marg, Bhavnagar - 364 002, India
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  • Journal of Chemical Sciences | News

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