Polymerization and Oligomerization of Ethylene by Cationic Nickel(II) and Palladium(II) Complexes Containing Bidentate Phenacyldiarylphosphine Ligands
作者:Jon M. Malinoski、Maurice Brookhart
DOI:10.1021/om030388h
日期:2003.12.1
A series of Ni(II) and Pd(II) catalysts have been synthesized from the P,O chelating ligands phenacyl(aryl)2phosphine. The (P,O)Ni-allyl+B(Arf)4- [Arf = 3,5-(CF3)2C6H3] complexes 6a−c are active for polymerization of ethylene in the case of 6b (aryl = 2,4,6-(CH3)3C6H2) and for dimerization of ethylene to butenes in the case of 6a (aryl = C6H5) and 6c (aryl = C6H5, 2,4,6-(C6H5)3C6H2). These catalysts
从P,O螯合配体苯甲酰基(芳基)2膦合成了一系列Ni(II)和Pd(II)催化剂。的(P,O)的Ni-烯丙基+ B(氩˚F)4 - [氩˚F = 3,5-(CF 3)2 C ^ 6 ħ 3 ]配合物6A - Ç是用于的情况下乙烯的聚合活性6B(芳基= 2,4,6-(CH 3)3 C 6 H 2),并且在6a的情况下将乙烯二聚为丁烯(芳基= C 6 H 5)和图6c(芳基= C 6 H ^ 5,2,4,6-(C 6 H ^ 5)3 c ^ 6 ħ 2)。这些催化剂的特征在于它们的高初始活性,但是相对较短的催化寿命和差的热稳定性。钯类似物(P,O)PDME(NCMe)+ B(氩˚F)4 -大约比镍类似物大小较不活跃的顺序和生成丁烯和己烯。一系列甲基乙烯络合物[(p -XC 6 H 4)2 PCH 2中的迁移插入的障碍C(O)(p -YC 6 ħ 4)将Pd(CH 3)(C 2 H ^ 4)+ B(氩˚F)4