A new P—N—P ligand is useful in ethylene oligomerizations. In combination with i) a source of chromium and ii) an activator such as methylalumoxane; the ligand of this invention may be used to prepare an oligomer product that contains a mixture of hexenes and octenes. The hexenes and octenes produced with this ligand contain very low levels of internal olefins when produced under preferred reaction conditions.
一种新的P-N-P
配体在
乙烯寡聚反应中非常有用。与i)
铬源和ii)活化剂(例如甲基铝氧烷)结合使用,本发明的
配体可用于制备含有己烯和
辛烯混合物的寡聚产物。在首选反应条件下生产的这种
配体产生的己烯和
辛烯含有非常低
水平的内部烯烃。