Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 E California Blvd MC 127-72, Pasadena, CA 91125, USA.
Dalton Trans. 2018 Dec 18;48(1):40-44. doi: 10.1039/c8dt04509g.
The selectivity-determining mechanistic steps of ethylene tetramerization and trimerization are evaluated in light of isotopic labeling experiments. A mechanism based upon a shared chromacycloheptane intermediate rather than the C-C coupling of chromacyclopentanes or Cr speciation into independent trimerization and tetramerization catalysts is consistent with the data, including observed upper limits on 1-octene selectivity.
根据同位素标记实验，评估了乙烯四聚和三聚选择性决定的机理步骤。基于共享的色环庚烷中间体而不是色环戊烷的 C-C 偶联或 Cr 形态转化为独立的三聚化和四聚化催化剂的机理与数据一致，包括观察到的 1-辛烯选择性的上限。
