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Synthesis, characterization and ethylene oligomerization studies of nickel complexes bearing 2-imino-1,10-phenanthrolines |
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| Authors: | Wen-Hua Sun Shu Zhang Wen Zhang Hongwei Ma Katrin Wedeking |
| Affiliation: | a Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China b State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China c Organisch-Chemisches Institut der Universität Münster, Corrensstr. 40, 48149 Münster, Germany |
| Abstract: | A series of nickel (II) complexes ligated by 2-imino-1,10-phenanthrolines were synthesized and characterized by elemental and spectroscopic analysis as well as by single-crystal X-ray crystallography. X-ray crystallographic analysis reveals complexes 3, 5, 7 and 11 as the five-coordinated distorted trigonal-bipyramidal geometry. Upon activation with Et2AlCl, these complexes exhibited considerably high activity for ethylene oligomerization (up to 3.76 × 107 g mol−1(Ni) h−1 for 12 with 10 equiv. of PPh3). The ligand environment and reaction conditions significantly affect the catalytic activity of their nickel complexes. |
| Keywords: | 2-Imino-1,10-phenanthrolinyl ligands Nickel complexes Ethylene oligomerization |
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