物理化学学报 >> 1999, Vol. 15 >> Issue (03): 284-288.doi: 10.3866/PKU.WHXB19990317

研究简报 上一篇    

钯(II)催化CO/乙烯的交替共聚

罗河宽, 李达刚   

  1. 北京化工研究院,北京 100013|中国科学院兰州化学物理研究所,兰州 730000
  • 收稿日期:1998-05-11 修回日期:1998-08-31 发布日期:1999-03-15
  • 通讯作者: 罗河宽

Alternative Copolymerization of CO and Ethylene Catalyzed by Palladium(II)

Luo He-Kuan, Li Da-Gang   

  1. Beijing Research Institute of Chemical Industry,Beijing 100013|Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lnzhou 730000
  • Received:1998-05-11 Revised:1998-08-31 Published:1999-03-15
  • Contact: Luo He-Kuan

关键词: 一氧化碳, 乙烯, 聚酮, 钯(II)催化剂, 原位核磁

Abstract:

With high presure in situ 1H NMR technique, the alternative copolymerization of CO with ethylene catalyzed by Pd(Ⅱ)-DPPPr-CF3COOH catalyst were studied under 2.0MPa CO/ethylene(1:1 ,molar ratio) using CD 3OD and CD 3COCD 3 as solvents. The 1H NMR signals of coordinated ethylene and methylene linked to Pd(Ⅱ) were observed, which showed that ethylene was activated by coordination with Pd(Ⅱ) during the copolymerization before it's insertion into Pd—C bond to achieve the chain propagation. But the signal of Pd—H bond was not observed in all the in situ 1H NMR experiments, which indicated that the copolymerization initiation was not caused by Pd—H bond, or Pd—H initiation was very few in alcoholic solvent.

Key words: Carbon monoxide, Ethylene, Polyketone, Pd(II) catalyst, In situ NMR