Effects of halide in homogeneous Cr(III)/PNP/MAO catalytic systems for ethylene tetramerization toward 1-octene
作者： Hongxia Chen , Xiaoyu Liu , Wenbo Hu , Yingnan Ning , Tao Jiang
DOI: 10.1016/J.MOLCATA.2007.02.013
关键词:
摘要: Abstract In homogeneous Cr(III)/methylaluminoxane/cyclopentyl-bisphosphineamine (PNP)/halide ethylene tetramerization catalyst systems, the effects of halide on 1-octene formation selectivity and catalytic activity were investigated. The comparative studies showed that both four-member systems containing dichloromethane higher than those trichloromethane tetrachoromethane. 1,1,2-Trichloroethane much improvement 1,1,1-trichloroethane. chloride was better a corresponding bromide. So we can draw conclusion steric hindrance, molecular stability, halides group configuration, types are important factors for toward 1-octene. Some specific interaction modes halogen groups with active Cr species in cycle proposed to explain reaction.
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