文献类型：期刊文献

英文题名：Novel neutral arylnickel(II) phosphine catalysts containing 2-oxazolinylphenolato N-O chelate ligands for ethylene oligomerization and propylene dimerization

作者：Zhao, W; Qian, YL; Huang, JL; Duan, JJ

机构：[1]E China Univ Sci & Technol, Organomet Chem Lab, Shanghai 200237, Peoples R China

年份：2004

卷号：689

期号：16

起止页码：2614

外文期刊名：JOURNAL OF ORGANOMETALLIC CHEMISTRY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000223386200007)，CCR-EXPANDED(收录号:WOS:000223386200007)】；

语种：英文

外文关键词：nickel complexes; oxazoline ligand; ethylene oligomerization; propylene dimerization

摘要：A series of new neutral arylnickel(II) phosphine complexes 1 bearing 2-oxazolinylphenolato ligands [2-(4-R(1)-5-R(2)-C(3)H(2)NO)-C(6)H(4)O]Ni(2-R (4)-4-R(3)-C(6)H(3))(PPh(3)) were synthesized by reactions of sodium salts of 2-(4,5-dihydro-2-oxazolyl)phenol derivatives with trans-Ni(Ar)(Cl)(PPh(3))(2) or by direct reactions of the ligands with trans-Ni(Ar)(Cl)(PPh(3))(2) in the presence of NEt(3). These neutral Ni(II) complexes 1 exhibited high activities and selectivities in ethylene oligomerization and propylene dimerization. The catalytic activities and the product distributions were dependent on the selection of various organoaluminum cocatalysts and phosphine scavenger (Ni(COD)(2)). The effects of various reaction conditions on ethylene oligomerization were also examined. The highest activity of 5.51 x 10(5) g oligomers/(mol Ni (.) h) and 83% selectivity of C(6) internal olefins were obtained in 1a/MAO catalytic system in ethylene oligomerization. The oligomers consisted mainly of lower carbon olefins in the range of C(4)-C(8). Complexes 1 showed the moderate tolerance of polar additives in ethylene oligomerization. The highest activity of 1a/MAO in propylene dimerization reached to 1.32 x 10(5) g oligomers/(mol Ni(.)h). (C) 2004 Published by Elsevier B.V.