钯催化CO/乙烯共聚配体和阴离子效应  

Ligand and Anion Effects of Palladium Catalyst for CO/Ethylene Copolymerization

作　　者：罗河宽[1] 李达刚[2] 寇元[3] 

机构地区：[1]北京化工研究院,北京100013 [2]中国科学院兰州化学物理研究所,兰州730000 [3]北京大学化学与分子工程学院,北京100871

出　　处：《物理化学学报》2000年第3期273-277,共5页Acta Physico-Chimica Sinica

摘　　要：Six complexes of two series were studied as the catalyst precursors for CO/ethylene copolymerization by using catalytic evaluation method and EXAFS technique.The first series of the complexes has general formular (L)Pd(OCOCF3)2 in which L is DPPPr,DPPBu or DPPEt.The second series of the complexes has general formular (DPPPr)Pd(A)2 in which A-is CF3COO-,P-CH3PhSO3-,Cl-or CH3COO-.The results showed that suitable ligands have relatively strong coordination ability to palladium(Ⅱ) center.Suitable anoins belonging to strong acids,have excellent stability on cationic palladium(Ⅱ),and easy to leave away to give coordination vacant to comonomers.Six complexes of two series were studied as the catalyst precursors for CO/ethylene copolymerization by using catalytic evaluation method and EXAFS technique.The first series of the complexes has general formular (L)Pd(OCOCF3)2 in which L is DPPPr,DPPBu or DPPEt.The second series of the complexes has general formular (DPPPr)Pd(A)2 in which A-is CF3COO-,P-CH3PhSO3-,Cl-or CH3COO-.The results showed that suitable ligands have relatively strong coordination ability to palladium(Ⅱ) center.Suitable anoins belonging to strong acids,have excellent stability on cationic palladium(Ⅱ),and easy to leave away to give coordination vacant to comonomers.

关 键 词：一氧化碳 乙烯 聚酮 钯催化剂 阴离子效应 

分 类 号：TQ426[化学工程]