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  Global Journal of Inorganic Chemistry. Volume 1, Issue 1 (2010) pp. 9-33
  Review Article
Carbonyl Complexes of Rhodium and Iridium containing Nitrogen and Nitrogen-Oxygen Donor Ligands: Reactivity and Catalytic Carbonylation of Alcohol
  Dipak Kumar Dutta  
North-East Institute of Science and Technology ( Formerly Regional Research Laboratory) (Council of Scientific and Industrial Research), Jorhat 785006, Assam, INDIA

Rhodium(I) and iridium(I) carbonyl complexes of nitrogen (N) and nitrogen-oxygen (N-O) donor ligands are of much interest in recent time because of their structural novelty, reactivities and catalytic applications. Different types of N and N-O donor ligands like pyridine, hydroxyl pyridines, pyridine alcohols, pyridine aldehydes, pyridine carboxylic acids, pyridine esters, benzoylpyridines, aminophenols, aminobenzoic acids etc. form a wide variety of interesting metal complexes of rhodium and iridium. Some N-O ligands act as bidentate chelating donors and show interesting structural features leading to development of supramolecular structures. The steric and electronic effects as well as kinetics of oxidative addition of the complexes with different electrophiles like CH3I, C2H5I, I2 etc. are interesting. The catalytic carbonylation of alcohol exhibited by different rhodium carbonyl complexes are efficient and show high Turn Over Number. Iridium based catalytic carbonylation of methanol is gaining much industrial importance compared to rhodium based catalyst because of several advantages.

  Rhodium; iridium; carbonyl group; nitrogen-oxygen ligand; oxidative addition; catalytic carbonylation  

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