Iridium(III) and Rhodium(III) compounds of dipyridyl-N-alkylimine and dipyridyl-NH-ketimine: Spectral characterization and crystal structure

Journal of Chemical Sciences

PENG WANG²  YURIJ MOZHARIVSKYJ²  KEISHAM S SINGH1³  NITEEN A NARKHEDE¹ 

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

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

DOI  :  

来源: Indian Academy of Sciences

【 摘 要 】

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.

【 授权许可】

Unknown