1154054-67-7Relevant academic research and scientific papers
Crystallographic revelation of the role of AIMe3 (in MAO) in Cr [NNN] pyrazolyl catalyzed ethylene trimerization
Zhang, Jun,Li, Aifang,Hor, T. S. Andy
, p. 2935 - 2937 (2009)
A series of Cr-Al intermetallic complexes, viz. [(Pz3CH) 2Cr112(μ-Cl)2]2 + 2[(Me2XAl)(μ-Cl)(Me2XAl)]- (X = Me/Cl), Pz3CHCr111/su
Ligand effect on ethylene trimerisation with [NNN]-heteroscorpionate pyrazolyl Cr(III) catalysts
Zhang, Jun,Li, Aifang,Hor, T. S. Andy
, p. 9327 - 9333 (2010/02/16)
Cr(III) complexes with [NNN]-heteroscorpionate pyrazolyl ligands of the type Pz'2CHX (Pz' = pyrazol-l-yl (Pz), or 3,5-dimethylpyrazol-1-yl (PzMe); X = N-containing heterocyclic ring or amine CH 2NR1R2; R1, R2 = H or alkyl) have been prepared. Upon activation with MAO, they are active for selective ethylene trimerisation to 1-hexene. The effects of the hetero-functional group and chelate ring size on the catalytic performance have been examined. The pre-catalysts with an N-heterocycle substituent show highest activity [32400-53000 g/(g Cr h-1)] and total C6 selectivities (>97.6%) as well as 1-hexene selectivity (>96.0%) among hexenes. The X-ray single-crystal crystallographic analysis of CrCl 3[PzMe2CH2NCH2Ph] and CrCl3[PzMe2CH2NCH2Fc] (Fc = ferrocenyl) shows a tridentate coordination on the fac-octahedral Cr(III) sphere with the Cr-N bond length dependent on the N-substituent.
