化学学报 ›› 1988, Vol. 46 ›› Issue (9): 919-923. 上一篇    下一篇

研究论文

1,5-环辛二烯阳离子型跨环齐聚合反应

袁萃明;颜德岳;徐祥铭;王佛松   

  1. 上海交通大学应用化学系;中国科学院长春应用化学研究所
  • 发布日期:1988-09-15

Cationic transannular oligomerization of 1,5-cyclooctadiene

YUAN CUIMING;YAN DEYUE;XU XIANGMING;WANG FUSONG   

  • Published:1988-09-15

本文系统地研究了1,5-环辛二烯(COD)在BF3.OEt2和AlCl3催化下的阳离子型跨环聚合. 考察了引发剂、助催化剂以及溶剂等因素对单体转化率的影响. 得到的齐聚物数均分子量为1000左右, 软化温度为140-160℃. 采用裂解色谱-质谱证明产物具有1的结构.

关键词: 分子量分布, 反应机理, 氯化铝, 结构分析, 溶剂效应, 数均分子量, 跨环反应, 齐聚, 环辛二烯 P, 色谱质谱法

Cationic transannular oligomerization of 1,5-cyclooctadiene (I) using BF3.OEt2 or AlCl3 catalysts was studied. The conversion rate reached a constant when AlCl3-I molar ratio >4.0 ?10-2., while the conversion rate increased with increasing BF3.OEt2-I molar ratio. The conversion rate of I decreased in the presence of water and the catalytic activity of AlCl3 was higher than that of BF3OEt2. The average mol. wt. of the oligomer was ~103 and the softening temperature was 140-160? Pyrolysis gas chromatog.-mass spectrometric anal. showed that the major pyrolytic products of I was bicyclo[3.3.0]octane. A mechanism for oligomerization of I was proposed.

Key words: MOLECULAR WEIGHT DISTRIBUTION, REACTION MECHANISM, ALUMINIUM CHLORIDE, STRUCTURAL ANALYSIS, SOLVENT EFFECT, NUMBER AVERAGE MOLECULAR WEIGHT, PERICYCLIZATION, OLIGOMERIZATION, CYCLOOCTADIENE P, CHROMATOGRAPHY-MASS SPECTROGRAPHY

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