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Nickel and Palladium Complexes with New Phosphinito-Imine Ligands and Their Application as Ethylene Oligomerization Catalysts

Opened Access Nickel and Palladium Complexes with New Phosphinito-Imine Ligands and Their Application as Ethylene Oligomerization Catalysts

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Autor: Ortiz de la Tabla González, Laura
Matas Ruíz, Inmaculada
Palma Ramírez, María del Pilar
Álvarez González, Eleuterio
Cámpora Pérez, Juan
Departamento: Universidad de Sevilla. Departamento de Química Orgánica
Fecha: 2012
Publicado en: Organometallics, 31 (3), 1006-1016.
Tipo de documento: Artículo
Resumen: Phosphinito-imines, a new class of P,N donors, are readily generated by reaction of bulky arylamide anions [R2CONAr]− (R2 = Me or t-Bu; Ar = 2,6-i-Pr2C6H4) with chlorophosphines ClP(R1)2. In solution, free phosphinito-imines exist in equilibrium with the corresponding amidophosphine tautomers, containing a nitrogen-bound P(R1)2 group. However, reacting the tautomer mixtures with metal precursor complexes, such as NiBr2(dme) or PdCl2(cod), selectively affords stable phosphinito-imine complexes MX2(P-N) (M = Ni, Pd) in excellent yields. These complexes are diamagnetic and exhibit square-planar structures in the solid state, but in solution, the Ni derivatives exchange with a small amount of the corresponding high-spin tetrahedral isomers. On treatment with MMAO or DEAC, NiX2(P-N) complexes become active ethylene oligomerization catalysts, affording mainly butenes along with smaller amounts of hexenes and octenes. The activity and the selectivity of these catalysts depend on the structur...
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Cita: Ortiz de la Tabla González, L., Matas Ruíz, I., Palma Ramírez, M.d.P., Álvarez González, E. y Cámpora Pérez, J. (2012). Nickel and Palladium Complexes with New Phosphinito-Imine Ligands and Their Application as Ethylene Oligomerization Catalysts. Organometallics, 31 (3), 1006-1016.
Tamaño: 529.2Kb
Formato: PDF

URI: https://hdl.handle.net/11441/79352

DOI: 10.1021/om201088y

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