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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 30, Number 3
BKCSDE 30(3)
March 20, 2009

Title	Novel and Efficient Palladium Complexes with β-Ketoiminate Ligands for the Polymerization of Norbornene
Author	Dong Hwan Lee, Yoon Joo Hwang, Jin San Yoon, Moon Kun Choi, Ik Mo Lee*
Keywords	Palladium complexes, β-Ketoiminate ligands, Norbornene polymerization, Activators, Structures
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)].
Page	636 - 646
Full Text	PDF

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