高等学校化学学报 ›› 1986, Vol. 7 ›› Issue (7): 645.

• 研究论文 • 上一篇    下一篇

高分子载体Lewis酸催化剂:聚苯乙烯、三氯化铝/四氯化钛复合物

冉瑞成, 裴伟伟, 贾欣茹, 沈吉, 蒋硕健   

  1. 北京大学化学系
  • 收稿日期:1985-04-08 出版日期:1986-07-24 发布日期:1986-07-24

A Lewis Acid Catalyst Supported by Polymer: Polystyrene AlCl3/TiCl4 Complex

Ran Ruicheng, Pei Weiwei, Jia Xinru, Shen Ji, Jiang Shuojian   

  1. Department of Chemistry, Peking University, Beijing
  • Received:1985-04-08 Online:1986-07-24 Published:1986-07-24

摘要: 聚苯乙烯交联白球与等摩尔的AlCL3和TiCl4混合物在CS2中反应,可制得一种十分稳定的高分子-双金属盐复合物。此复合物含氧量为11.4%,Al/Ti=2/1。它在丙酮水溶液中显强酸性,且约在2小时接近平衡酸度值。紫外及红外分析证实了聚苯乙烯与AlCl3/DiCl4之间复合物的形成。

Abstract: Polystyrene-divinylbenzenc (4%) copolymer beads is combined with anhydrous aluminium chloride and titanium tetrachloride ( 1:1) in CS2 to form a complex containing11.4% of chlorine,in which the ratio of the metal aluminum to the metal titanium approach to 2 :1 (Al/Ti=2/1) It correspond to (6.42×10-4mol A1C13 + 3.21×10-4mol TiCl4)/ 1 g complex beads.The complex is a strong solid Lewis acid and is very stable in air.The polystyrene-AlCl3/TiCl4 complex (PS-Al/Ti) can be uscd to catalyze a lot of organic synthesis reactions in high yield,such as esterifications,acetal formations,kclal formations,ethcrications and the Friedel-Crafts alkylations.The fact that dibasic metal complex (PS-Al/Ti) is more reactive than the polystyrene-AiCl3 complex and the polystyrenc-TiCl4 complex is confirmed in many reactions.It is important that the complex (PS-Al/Ti) as a catalyst can be used repeatedly at least 7 times with high yield.

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