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化学学报
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化学学报 ›› 1987, Vol. 45 ›› Issue (12): 1192-1194. 上一篇    下一篇

研究论文

己烯氢羧基化反应中钯膦催化剂作用机理的原位红外光谱研究

孙衍文;寇元;夏春谷;李达刚   

  1. 中国科学院兰州化学物理研究所
  • 发布日期:1987-12-15

Study on the mechanism of the hydrocarboxylation of 1-hexene with in situ IR

SUN YANWEN;KOU YUAN;XIA CHUNGU;LI DAGANG   

  • Published:1987-12-15

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670

被引次数

1

用原位红外光谱研究了在合成气压力下钯-膦催化剂(PdCl2(PPh3)/PPh3和2-乙基己醇存在下己烯的氢羧基化.结果表明羰基钯中间体最先形成并和醇反应形成氢羧基化钯.然后是连续地进行烯烃插入,羰基配位和醇解得到酯,并重新生成(R'O)Pd(CO)(PPh3)2中间体.

关键词: 催化, 反应机理, 红外分光光度法, 催化剂, 己烯 P, 三苯基膦, 钯, 原位, 羧基化

The hydrocarboxylation of 1-hexene in the presence of PdCl2(PPh3)2/PPh3 and 2-ethylhexanol (R'OH) under the syn gas pressure was studied with the aid of in situ IR spectroscopy. The result showed that the carbonyl palladium intermediates initially formed, reacted with the alcohol to form hydrocarboxylated palladium species which then underwent through successively the steps of olefin insertion, CO coordination and alcoholysis to yield the ester and regenerate the intermediate (R'O)Pd(CO)(PPh3)2.

Key words: CATALYSIS, REACTION MECHANISM, INFRARED SPECTROPHOTOMETRY, CATALYST, HEXENE P, TRIPHENYLPHOSPHINE, PALLADIUM, IN-SITU, CARBOXYLATION

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