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Ethylene oligomerization promoted by nickel-based catalysts with silicon-bridged diphosphine amine ligands

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Abstract

A series of nickel complexes [Ni(L1)Br2] (C1), [Ni(L2)Br2] (C2) and [Ni(L3)Br2] (C3) (L1 = N-isopropyl-N-(((diphenylphosphanyl)methyl)dimethylsilyl)-1,1-diphenylphosphanamine, L2 = N-cyclopentyl-N-(((diphenylphosphanyl)methyl)dimethylsilyl)-1,1-diphenylphosphanamine, L3 = N-(2,6-diisopropylphenyl)-N-(((diphenylphosphanyl)methyl)dimethylsilyl)-1,1-diphenylphosphanamine) were synthesized and characterized by elemental analysis, mass spectrometry, spectroscopy and single-crystal X-ray diffraction. L1, L2 and L3 each act as bidentate ligands. Upon activation with ethylaluminum dichloride, these complexes produce efficient catalytic systems for selective dimerization of ethylene to 1-butene, with catalytic activities of 3.45 × 107 g/(molNi·h) and 95.6% butene selectivity containing 87.6% 1-butene fraction.

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Acknowledgements

This study was supported by the National Key Research and Development Program of China (2017YFB0306700). The Natural Science Foundation of Tianjin City (14JCYBJC23100, 15JCYBJC48100 and 16JCZDJC31600).

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Authors and Affiliations

  1. Tianjin Marine Chemical Technology Engineering Center, College of Chemical Engineering and Material Science, Tianjin University of Science and Technology, Tianjin, 300457, China

    Wei Wei, Fakhre Alam, Yongwang Huang, Shaoling Cheng & Tao Jiang

  2. PetroChina Daqing Chemical Engineering Research Center, Daqing, 163714, China

    Buwei Yu

Authors
  1. Wei Wei
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  2. Buwei Yu
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  3. Fakhre Alam
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  4. Yongwang Huang
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  5. Shaoling Cheng
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  6. Tao Jiang
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Corresponding author

Correspondence to Tao Jiang.

Electronic supplementary material

Below is the link to the electronic supplementary material.

11243_2018_276_MOESM1_ESM.doc

CCDC numbers 1859463 and 1859467 contain the supplementary crystallographic data for C2 and C3. The data can be obtained free of charge from the Cambridge Crystallographic Data Centre via http://www.ccdc.cam.ac.uk/. (DOC 3155 kb)

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Wei, W., Yu, B., Alam, F. et al. Ethylene oligomerization promoted by nickel-based catalysts with silicon-bridged diphosphine amine ligands. Transit Met Chem 44, 125–133 (2019). https://doi.org/10.1007/s11243-018-0276-7

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  • DOI: https://doi.org/10.1007/s11243-018-0276-7

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