Coordination Chemistry of Iridium Phosphine–Sulfonate Complexes

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• 作者：Nadia G. Leonard (1)
  Grace V. Parker (1)
  Paul G. Williard (1)
  Wesley H. Bernskoetter (1)
  
• 关键词：Phosphine–sulfonate ; Iridium ; Coordination chemistry ; Hydrogenation
• 刊名：Journal of Inorganic and Organometallic Polymers and Materials
• 出版年：2014
• 出版时间：January 2014
• 年：2014
• 卷：24
• 期：1
• 页码：157-163
• 全文大小：296 KB
• 作者单位：Nadia G. Leonard (1)
  Grace V. Parker (1)
  Paul G. Williard (1)
  Wesley H. Bernskoetter (1)
  
  1. Department of Chemistry, Brown University, Providence, RI, 02912, USA
  
• ISSN：1574-1451

文摘

A family of new iridium phosphine–sulfonate complexes based on 2-dicyclohexylphosphino-4-benzenesulfonic acid was synthesized and characterized. An iridium(I) phosphine–sulfonate cyclooctadiene species was prepared from transmetalation of a silver salt of the phosphine–sulfonate ligand and iridium(I) cyclooctadiene chloride dimer. This diolefin iridium complex was found to be a functional precatalyst for cyclopentene hydrogenation. A corresponding iridium(I) phosphine–sulfonate dicarbonyl species was prepared by ligand substitution using carbon monoxide. Analysis by infrared spectroscopy established this metal–ligand platform as a relatively electron poor coordination environment. The iridium(I) phosphine–sulfonate cyclooctadiene species was further utilized as a precursor for the synthesis of two iridium(III) phosphine–sulfonate hydride compounds by treatment with strong acids.