Homogeneous catalysis of the water gas shift reaction: Ir, ¹h- and 13c-nmr in situ studies on catalytic iridium systems

• A.J. Pardey ^[1] ; M.A. Moreno ^[1] ; M.C. Ortega ^[1] ; B. Mendez ^[1] ; A.B. Rivas ^[1] ; S.A. Moya ^[2] ; D. Villagra ^[2] ; M. Lutz ^[3]
  1. [1] Universidad Central de Venezuela

     Universidad Central de Venezuela

     Venezuela

     
  2. [2] Universidad de Santiago de Chile

     Universidad de Santiago de Chile

     Santiago, Chile

     
  3. [3] University of Joensuu Departament of Chemistry

  Mostrar afiliaciones +
• Localización: Journal of the Chilean Chemical Society (Boletín de la Sociedad Chilena de Química), ISSN-e 0717-6309, ISSN 0366-1644, Vol. 48, Nº. 2, 2003, págs. 19-21
• Idioma: inglés
• Enlaces
  • Texto completo
• Resumen

  • Reported here are the in situ FT-IR and 13C-NMR spectroscopic studies of the complex cis-[Ir(CO)2(py)2](PF6 ) (py = pyridine) dissolved in 80% aqueous pyridine used as a precursor in the homogeneous catalysis of the water gas shift reaction (WGSR, CO + H2O Æ CO2 + H2). These spectroscopy studies reveal the presence of aminocarbonyliridium complexes with linear and bridging carbonyls groups as reaction intermediates. The WGSR catalysis by Ir4(CO)12 complex dissolved in 80% of aqueous 4-picoline or pyridine under 1.9 atm of CO at 100 C and the FT-IR and ¹H-NMR in situ studies of the pyridine promoted disproportionation of Ir4(CO)12, are also described