Highly active 8-benzoxazolyl- or 8-benzothiazolyl-2-alkylquinolinylnickel(II) complexes for ethylene dimerization and vinyl polymerization of norbornene
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Add time:09/01/2019 Source:sciencedirect.com
The series of nickel halide complexes LNiX2 (C1–C6, X = Cl; C7–C12, X = Br), where L represents one of 8-benzoxazolyl-2-alkylquinoline or 8-benzothiazolyl-2-alkylquinoline derivatives, have been prepared. The molecular structures of the representative complexes C1, C3, C6 and C11 were determined by single crystal X-ray diffraction. Upon activation with ethylaluminium sesquichloride (EASC), all nickel complex pre-catalysts exhibited good activities for ethylene dimerization. Furthermore, such nickel pre-catalysts, in the presence of methylaluminoxane (MAO), were capable of the vinyl polymerization norbornene.
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