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Biphasic oligomerization of ethylene with nickel complexes immobilized in organochloroaluminate ionic liquids
Author(s) -
Pei Lixia,
Liu Xianmei,
Gao Haiyang,
Wu Qing
Publication year - 2009
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.1542
Subject(s) - chemistry , catalysis , nickel , ionic liquid , ethylene , decantation , turnover number , phase (matter) , ionic bonding , molar ratio , polymer chemistry , inorganic chemistry , nuclear chemistry , organic chemistry , ion
Ethylene was selectively oligomerized by nickel complexes such as (PPh 3 ) 2 NiBr 2 and (PPh 3 ) 2 NiCl 2 immobilized in chloroaluminate ionic liquid in biphasic catalytic reactions. The influence of reaction parameters such as reaction media, reaction temperature and Et 2 AlCl:Ni molar ratio was also evaluated. Turnover frequency up to 24000 mol C 2 H 4 /(mol Ni h) was achieved under mild reaction conditions (0.5 atm and 40 °C). GC‐MS analyses showed that the obtained oligomers completely consist of C4 and C6. The olefinic products can be easily separated from the catalytic ionic liquid phase by simple decantation, and the nickel catalyst can be reused without a significant decrease in turnover frequency and change of the distribution of the olefinic products. Copyright © 2009 John Wiley & Sons, Ltd.