Synthesis, structure and ethylene oligomerization behavior of non-symmetric bidentate neutral arylnickel(II) phosphine complexes |
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| Authors: | You-Ming Zhang Qi Lin Dong-Heng Zhang |
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| Affiliation: | a College of Chemistry and Chemical Engineering, Gansu Key Laboratory of Polymer Materials, Northwest Normal University, Lanzhou, Gansu 730070, PR China
b Institute of Chemistry, The Center for Molecular Sciences, The Chinese Academy of Sciences, Beijing 100080, PR China |
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| Abstract: | A series of new neutral arylnickel(II) phosphine complexes bearing non-symmetric bidentate chelate ligands, 3-aryliminomethyl-5-chloro-2-hydroxybenzaldehyde, have been synthesized, and the structure of representative complexes (2b and 2d) has been confirmed by X-ray crystallographic analysis. These neutral arylnickel(II) phosphine complexes have been investigated as catalysts for ethylene oligomerization. Using methylaluminoxane (MAO) as a cocatalyst, these complexes display high ethylene oligomerization activities. A catalytic activity of up to 4.6 × 106 g mol−1 h−1 has been observed. The influence of Al/Ni molar ratio, reaction temperature, reaction period and pressure on catalytic activity was investigated. |
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| Keywords: | Neutral nickel(II) complex X-ray crystallography Catalyst Methylaluminoxane Ethylene oligomerization |
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