具有双(二苯基膦基)胺配体(o- CD 3 OC 6)的铬基乙烯三聚催化剂前体((PNP OMe - d 12)CrPh 3(4)和(PNP OMe - d 12)CrPh 2 Cl(7)H 4)2 PN(CH 3)P(o- CD 3 OC 6 H 4)2((PNP OMe - d 12)= 1)已准备好并进行了特征化。硫醚类似物(o- CD 3 SC 6 H 4)2 PN(CH 3)P(o- CD 3 SC 6 H 4)2((PNP SMe - d 12)= 2)及其三苯基铬配合物(PNP SMe)还合成了CrPh 3(5)。的固态结构4和7显示的八面体几何形状的具有κ 3 - (P,P,O)PNP的协调OMe配体的铬-氧键长度为2.29-2.44Å。化合物5度的不同,表现出(S,P,S)-κ 3的PNP的协调SMe的配体。氘代甲基使溶液中的这些顺磁性配合物具有2 H NMR表征。室温下
Ethylene Trimerization Catalysts Based on Chromium Complexes with a Nitrogen-Bridged Diphosphine Ligand Having <i>o</i><i>rtho-</i>Methoxyaryl or <i>o</i><i>rtho-</i>Thiomethoxy Substituents: Well-Defined Catalyst Precursors and Investigations of the Mechanism
作者:Susan J. Schofer、Michael W. Day、Lawrence M. Henling、Jay A. Labinger、John E. Bercaw
DOI:10.1021/om0506062
日期:2006.5.1
ligand. The deuteromethyl groups allow for 2H NMR characterization of these paramagnetic complexes in solution. Dynamic exchange processes occur in solution at room temperature to render all four of the methoxy or thioether groups equivalent on the 2H NMR time scale; two distinct coalescence processes are observed by variable-temperature 2H NMRspectroscopy for all compounds. The neutral species 4 and
具有双(二苯基膦基)胺配体(o- CD 3 OC 6)的铬基乙烯三聚催化剂前体((PNP OMe - d 12)CrPh 3(4)和(PNP OMe - d 12)CrPh 2 Cl(7)H 4)2 PN(CH 3)P(o- CD 3 OC 6 H 4)2((PNP OMe - d 12)= 1)已准备好并进行了特征化。硫醚类似物(o- CD 3 SC 6 H 4)2 PN(CH 3)P(o- CD 3 SC 6 H 4)2((PNP SMe - d 12)= 2)及其三苯基铬配合物(PNP SMe)还合成了CrPh 3(5)。的固态结构4和7显示的八面体几何形状的具有κ 3 - (P,P,O)PNP的协调OMe配体的铬-氧键长度为2.29-2.44Å。化合物5度的不同,表现出(S,P,S)-κ 3的PNP的协调SMe的配体。氘代甲基使溶液中的这些顺磁性配合物具有2 H NMR表征。室温下