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      https://www.ias.ac.in/article/fulltext/jcsc/129/03/0365-0372

    • Keywords

       

      Dipyridyl-NH-ketimine; Iridium; Rhodium; N-C bond cleavage; spectroscopy; crystal structure.

    • Abstract

       

      Pentamethylcyclopentadienyl iridium(III) and rhodium(III) complexes of formulation [(η⁵- C₅Me₅)M{(C₅H₄N) ₂C=NR)}Cl]PF₆ were prepared by the reaction of [MCl2(η⁵-C₅Me₅)] ₂ (M = Ir or Rh) with dipyridyl-N-alkylimine ligands, (C₅H₄N) ₂C=NR (R = Me or Et) in the presence of NH₄PF₆ at room temperature. The reaction also produced an unexpected dipyridyl-NH-ketimine organometallic compound

      [(η⁵-C₅Me₅)M {(C₅H₄N) ₂C=NH}Cl]PF6 as minor product when the reaction was performed under refluxing acetonitrile. The NH-ketimine compounds were formed via N-C single bond cleavage of imine ligand resulting in coordination of the transformed ligand, (C5₅H₄N) ₂C=NH to the metal centre. Complexes were obtained as their hexafluorophosphate salts and characterized based on IR, NMR and ESI-MS spectroscopic data. Authenticity of NH-ketimine organometallic compound was established by single crystal X-ray analysis of a representative compound, which crystallized in orthorhombic space group Pbcn and has a pseudo-octahedral geometry around the metal ion.

    • Author Affiliations

       

      KEISHAM S SINGH1 PENG WANG2 NITEEN A NARKHEDE3 YURIJ MOZHARIVSKYJ2

      1. Bioorganic Chemistry Laboratory, CSIR-National Institute of Oceanography, Goa 403 004, India
      2. Department of Chemistry, McMaster University, West Hamilton, Ontario, L8S 4M1, Canada
      3. CSIR-Indian Institute of Integrative Medicine, Mumbai 400 053, India
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