NDLI: Migratory insertion reactions of nickel and palladium σ-alkyl complexes with a phosphinito- imine ligand

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Ortiz De La Tabla, Laura Cámpora, Juan Palma, Pilar Álvarez, Eleuterio Matas, Inmaculada
Description	Author Affiliation: Ortiz de la Tabla L ( Instituto de Investigaciones Químicas. Consejo Superior de Investigaciones Científicas - Universidad de Sevilla, Américo Vespucio, 49, 41092 Sevilla, Spain.)
Abstract	Ligand exchange reactions have been used for the synthesis of metallacyclic complexes of Ni and Pd of the type $[M(CH_{2}CMe_{2}-o-C_{6}H_{4})(P–N)],$ where P–N is the phosphinito- imine ligand $P(iPr)_{2}OC(Me)=N(2,6-C_{6}H_{3}(iPr)_{2}.$ The protic acid $[H(OEt_{2})(BAr′_{4})]$ (Ar′ = $3,5-C_{6}H_{3}(CF_{3})_{2})$ selectively cleaves one of the two σ metal–carbon bonds, affording cationic monoalkyl complexes. Nickel monoalkyls stabilized with $Et_{2}O$ 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.
ISSN	14779226
Issue Number	48
Journal	Dalton Trans.
Volume Number	41
e-ISSN	13645447
Language	English
Publisher	Royal Society of Chemistry
Publisher Date	2012-12-28
Publisher Place	Great Britain (UK)
Access Restriction	Subscribed
Subject Keyword	Chemistry
Content Type	Text
Resource Type	Article
Subject	Inorganic Chemistry

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