Novel and efficient palladium complexes with β-ketoiminate ligands for the polymerization of norbornene

Dong Hwan Lee, Yoon Joo Hwang, Jin San Yoon, Moon Kun Choi, Ik Mo Lee

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Abstract

A series of the noble palladium complexes containing β-ketoiminate ligands with internal bases, [Pd(η3-allyl)(β-ketoiminate)], [Pd(Me)(PPh3)(β-ketoiminate)] and [Pd(Me)(β-ketoiminate)], have been successfully prepared. Crystallographically determined structures showed that these complexes are distorted square planar and pendant bases of the β-ketoiminate ligands fail to coordinate to the metal in the first two classes of complexes while bases do coordinate in the 3rd class complexes. These complexes are active towards norbornene polymerization on activation with H(OEt2)2BAr'4 (Ar' = 3,5-bistrifluoromethylphenyl) and modified methylalumioxane (MMAO). MMAO is more efficient for the activation for polymerization. Generally, the polymerization activity increases with the following order; [Pd(allyl)(β-ketoiminate)] < [Pd(Me)(PPh3)(β-ketoiminate)] < [Pd(Me)(β-ketoiminate)].

Original languageEnglish
Pages (from-to)636-646
Number of pages11
JournalBulletin of the Korean Chemical Society
Volume30
Issue number3
DOIs
Publication statusPublished - 2009 Mar 1

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All Science Journal Classification (ASJC) codes

  • Chemistry(all)

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