PNP-type ligands showed very good property in the catalytic systems of PNP/Cr(Ⅲ)/methylaluminoxane(MAO)for ethylene selective tetramerization toward1-octene.In this research,two PNP analogues bis(diphenylphosphino)ph...PNP-type ligands showed very good property in the catalytic systems of PNP/Cr(Ⅲ)/methylaluminoxane(MAO)for ethylene selective tetramerization toward1-octene.In this research,two PNP analogues bis(diphenylphosphino)phenylborane and bis(diphenylphosphino)dimethylsilane have been synthesized and characterized.In combination with CrCl3(THF)3as active center and MAO as cocatalyst,these ligands produced a new catalytic systems for ethylene oligomerization to linear α-olefins with catalytic activities of up to 3.07 9 106g mol-1(cat)h-1.Herein,we report the effects of the reaction temperature,ethylene pressure,and the molar ratio of Al/Cr on the catalyst activities and product selectivities.展开更多
基金supported by the National Natural Science Foundation of China (U1162114,U1362110)the Program for New Century Excellent Talents in University (NCET-070142)
文摘PNP-type ligands showed very good property in the catalytic systems of PNP/Cr(Ⅲ)/methylaluminoxane(MAO)for ethylene selective tetramerization toward1-octene.In this research,two PNP analogues bis(diphenylphosphino)phenylborane and bis(diphenylphosphino)dimethylsilane have been synthesized and characterized.In combination with CrCl3(THF)3as active center and MAO as cocatalyst,these ligands produced a new catalytic systems for ethylene oligomerization to linear α-olefins with catalytic activities of up to 3.07 9 106g mol-1(cat)h-1.Herein,we report the effects of the reaction temperature,ethylene pressure,and the molar ratio of Al/Cr on the catalyst activities and product selectivities.
