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      https://www.ias.ac.in/article/fulltext/jcsc/121/03/0257-0266

    • Keywords

       

      1,3-Diaryltriazenes; rhodium; tris complexes; N,N coordination; crystal structure; spectral and electrochemical properties.

    • Abstract

       

      Reaction of 1,3-diaryltriazenes (abbreviated in general as HL-R, where R stands for the para-substituent in the aryl fragment and H stands for the dissociable hydrogen atom, R = OCH3, CH3, H, Cl, NO2) with [Rh(PPh3)2(CO)Cl] in ethanol in the presence of NEt3 produces a series of trisdiaryltriazenide complexes of rhodium of type [Rh(L-R)3], where the triazenes are coordinated to rhodium as monoanionic, bidentate N,N-donors. Structure of the [Rh(L-OCH3)3] complex has been determined by X-ray crystallography. The complexes are diamagnetic, and show characteristic 1H NMR signals and intense MLCT transitions in the visible region. They also fluoresce in the visible region under ambient condition while excited at around 400 nm. Cyclic voltammetry on these complexes shows a Rh(III)-Rh(IV) oxidation (within $0.84-1.67$ V vs SCE), followed by an oxidation of the coordinated triazene ligand (except the R = NO2 complex). An irreversible reduction of the coordinated triazene is also observed for all the complexes below $-1.03$ V vs SCE.

    • Author Affiliations

       

      Chhandasi Guharoy1 Michael G B Drew2 Samaresh Bhattacharya1

      1. Department of Chemistry, Inorganic Chemistry Section, Jadavpur University, Kolkata 700 032
      2. Department of Chemistry, University of Reading, Whiteknights, Reading RG6 6AD, UK
    • Dates

       
  • Journal of Chemical Sciences | News

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