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Synthesis and structure of Pd(II) complexes containing chelating (phosphinomethyl)oxazoline P,N-type ligands; copolymerisation of ethylene/CO

TitleSynthesis and structure of Pd(II) complexes containing chelating (phosphinomethyl)oxazoline P,N-type ligands; copolymerisation of ethylene/CO
Publication TypeJournal Article
Year of Publication2000
AuthorsBraunstein, P, Fryzuk, MD, Le Dall, M, Naud, F, Rettig, SJ, Speiser, F
JournalJournal of the Chemical Society-Dalton Transactions
Volume7
Pagination1067-1074
Type of ArticleArticle
ISBN Number0300-9246
KeywordsCARBON-MONOXIDE, CATALYZED ALTERNATING COPOLYMERIZATION, CH3CN, CRYSTAL-STRUCTURES, INSERTION REACTIONS, {ALLYLIC SUBSTITUTIONS
Abstract

The ligands (2-oxazoline-2-ylmethyl)diphenylphosphine (III or PCH(2)ox) and (2-oxazoline-2-ylmethyl-4,4-dimethyl)diphenylphosphine (IV or PCH(2)ox(Me2)) have been used as chelates towards Pd(II) methyl complexes. The complexes [PdMe(Cl)(PCH(2)ox)] 2a and [PdMe(Cl)(PCH(2)ox(Me2))] 2b were obtained from [PdMe(Cl)(cod)] (cod = cycloocta-1,5-diene) in 83% and 94% yield, respectively, and compared to [PdCl2(PCH(2)ox(Me2))] 1 which was characterised by X-ray diffraction. A series of cationic methyl complexes obtained by chloride abstraction in the presence of MeCN, SMe2, P(OPh)(3) or no added donor except the counter ion were prepared in order to evaluate their catalytic performances in ethylene/CO copolymerisation.

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