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      https://www.ias.ac.in/article/fulltext/jcsc/118/04/0319-0326

    • Keywords

       

      Pentamethylcyclopentadienyl; diphenyl-2-pyridylphosphine; rhodium and iridium complexes

    • Abstract

       

      The reaction of [{(η5-C5Me5)M(μ-Cl)Cl}2] {where M = Rh (1), Ir (2)} with functionalized phosphine viz., diphenyl-2-pyridylphosphine (PPh2Py) in dichloromethane solvent yield neutral ϰ1-P-coordinated rhodium and iridium complexes [(η5-C5Me5)RhCl21-P-PPh2Py)]3 and [(η5-C5Me5) IrCl21-P-PPh2Py)]4. Reaction of complexes 1 and 2 with the ligand PPh2Py in methanol under reflux give bis-substituted complexes such as [(η5-C5Me5)RhCl(ϰ1-P-PPh2Py)2]+5 and [(η5-C5Me5)IrCl(ϰ1-P-PPh2Py)2]+6, whereas stirring in methanol at room temperature gives P-, N-chelating complexes of the type [(η5-C5Me5)RhCl(ϰ2-P-N-PPh2Py)]+ 7 and [(η5-C5Me5)IrCl(ϰ2-P-N-PPh2Py)]+8. Neutral ϰ1-P-coordinated complexes [(η5-C5Me5)RhCl21-P-PPh2Py)]3 and [(η5-C5Me5)IrCl21-P-PPh2Py)]4 easily undergo conversion to the cationic P-, N-chelating complexes [(η5-C5Me5)RhCl(ϰ2-P-N-PPh2Py)]+7 and [(η5-C5Me5) IrCl(ϰ2-P, N-PPh2Py)]+8 on stirring in methanol at room temperature. These complexes are characterized by FT-IR and FT-NMR spectroscopy as well as analytical methods. The molecular structures of the representative complexes [(η5-C5Me5)RhCl21-P-PPh2Py)]3, [(η5-C5Me5)IrCl21-P-PPh2Py)]4 and hexafluorophosphate salt of complex [(η5-C5Me5)IrCl(ϰ2-P-PPh2Py)2]+6 are established by single-crystal X-ray diffraction methods

    • Author Affiliations

       

      Padavattan Govindaswamy1 Patrick J Carroll2 Yurij A Mozharivskyj3 Mohan Rao Kollipara1

      1. Department of Chemistry, North-Eastern Hill University, Shillong - 793 022
      2. Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania, PA - 19104, USA
      3. Department of Chemistry, McMaster University, Hamilton, Ontario - L8S 4M1, Canada
    • Dates

       
  • Journal of Chemical Sciences | News

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