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Rhodium and Iridium Complexes of Bulky Tertiary Phosphine Ligands. Searching for Isolable Cationic M(III) Alkylidenes

Opened Access Rhodium and Iridium Complexes of Bulky Tertiary Phosphine Ligands. Searching for Isolable Cationic M(III) Alkylidenes

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Autor: Campos, Jesús
Carmona Guzmán, Ernesto
Departamento: Universidad de Sevilla. Departamento de Química Inorgánica
Fecha: 2015
Publicado en: Organometallics, 34, 2212-2221.
Tipo de documento: Artículo
Resumen: Cyclometalated chloride complexes of rhodium and iridium based on (5-C5Me5)M(III) fragments that result from the metalation of the xylyl substituent of a coordinated PR2(Xyl) phosphine (Xyl=2,6-Me2C6H3) have been prepared by reaction of the appropriate metal precursor with the corresponding phosphine. For iridium, four complexes derived from the phosphines PiPr2(Xyl), 1a; PCy2(Xyl), 1b; PMe2(Xyl), 1c and PPh2(Xyl), 1d, have been prepared, whereas for rhodium only the complexes derived from PiPr2(Xyl), 2a and PMe2(Xyl), 2d have been studied. Chloride abstraction from compounds 1 and 2 by NaBArF (BArF= B(3,5-C6H3(CF3)2)4) leads to either cationic dichloromethane adducts or to cationic hydride-alkylidene structures resulting from -H elimination. The rhodium complexes investigated yield only dichloromethane adducts. However, in the iridium system the less sterically demanding phosphines PMe2(Xyl) and PPh2(Xyl) provide also dichloromethane adducts as the only observable products, whereas...
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Cita: Campos, J. y Carmona Guzmán, E. (2015). Rhodium and Iridium Complexes of Bulky Tertiary Phosphine Ligands. Searching for Isolable Cationic M(III) Alkylidenes. Organometallics, 34, 2212-2221.
Tamaño: 1.382Mb
Formato: PDF

URI: http://hdl.handle.net/11441/65578

DOI: 10.1021/om500910t

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