| 钯(II)催化CO/乙烯的交替共聚 |
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| 引用本文： | 罗河宽,李达刚. 钯(II)催化CO/乙烯的交替共聚[J]. 物理化学学报, 1999, 15(3): 284-288. DOI: 10.3866/PKU.WHXB19990317 |
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| 作者姓名： | 罗河宽 李达刚 |
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| 作者单位： | Beijing Research Institute of Chemical Industry,Beijing 100013,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lnzhou 730000 |
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| 摘 要： | 聚酮是一种新型光降解材料,近二十年来在国内外引起了广泛的兴趣,世界上许多大化学公司对开发聚酮新产品投入了极大的热情,Ｓｈｅｌｌ公司和ＢＰ公司都相继实现了工业化,其核心技术是催化剂,其中Ｓｈｅｌｌ公司在八十年代初期开发的钯(Ⅱ)双膦催化剂是过渡金属催化剂研究上的一个突破性进展[1,2],而贵金属钯的昂贵价格限制了聚酮向大规模工业化发展,为此吸引了众多的学者对共聚机理进行深入研究,以期寻找物美价廉的催化剂,但由于反应体系的复杂性以及催化剂中间态难以捕捉和表征的特点,至今人们提出的反应机理依据明显不足.对于在共聚反应状…
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| 关 键 词： | 一氧化碳 乙烯 聚酮 钯(II)催化剂 原位核磁 |
| 收稿时间： | 1998-05-11 |
| 修稿时间： | 1998-08-31 |
AlternativeCopolymerization of CO and Ethylene Catalyzed by Palladium( |
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| Luo Hekuan. AlternativeCopolymerization of CO and Ethylene Catalyzed by Palladium([J]. Acta Physico-Chimica Sinica, 1999, 15(3): 284-288. DOI: 10.3866/PKU.WHXB19990317 |
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| Authors: | Luo Hekuan |
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| Affiliation: | Beijing Research Institute of Chemical Industry,Beijing 100013|Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lnzhou 730000 |
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| 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. |
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| Keywords: | Carbon monoxide Ethylene Polyketone Pd(II) catalyst In situ NMR |
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