Artículo
Migratory insertion reactions of nickel and palladium σ-alkyl complexes with a phosphinito-imine ligand†‡
Autor/es | Ortíz de la Tabla González, Laura
Matas Ruíz, Inmaculada Álvarez González, Eleuterio Cámpora Pérez, Juan |
Fecha de publicación | 2012 |
Fecha de depósito | 2018-10-15 |
Publicado en |
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Resumen | Ligand exchange reactions have been used for the synthesis of metallacyclic complexes of Ni and Pd of the type [M[upper bond 1 start](CH2CMe2-o-C6[upper bond 1 end]H4)(P–N)], where P–N is the phosphinito-imine ligand ... Ligand exchange reactions have been used for the synthesis of metallacyclic complexes of Ni and Pd of the type [M[upper bond 1 start](CH2CMe2-o-C6[upper bond 1 end]H4)(P–N)], where P–N is the phosphinito-imine ligand P(iPr)2OC(Me)[double bond, length as m-dash]N(2,6-C6H3(iPr)2. The protic acid [H(OEt2)(BAr′4)] (Ar′ = 3,5-C6H3(CF3)2) selectively cleaves one of the two σ metal–carbon bonds, affording cationic monoalkyl complexes. Nickel monoalkyls stabilized with Et2O or MeCN ligands are thermally unstable and spontaneously undergo a decomposition process that ultimately leads to the breakdown of the phosphinito-imine ligand. In contrast, cationic alkylpalladium derivatives are thermally very stable, allowing the isolation of a formally unsaturated monoalkyl complex stabilized by an intramolecular π-arene interaction. Although monoalkynickel and -palladium phosphinito-imine derivatives are inactive as ethylene polymerization or copolymerization catalysts, they readily experience migratory insertion reactions. A palladium chelate arising from the successive insertion of CO and ethylene has been isolated and characterized. |
Agencias financiadoras | Ministerio de Ciencia y Tecnología (MCYT). España Junta de Andalucía |
Identificador del proyecto | CTQ2009-11721
P09-FQM5074 |
Cita | Ortíz de la Tabla González, L., Matas Ruíz, I., Álvarez González, E. y Cámpora Pérez, J. (2012). Migratory insertion reactions of nickel and palladium σ-alkyl complexes with a phosphinito-imine ligand†‡. Dalton Transactions, 41, 14524-14539. |
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