高分子载体四氯化锡复合物催化剂 V.苯乙烯与丙烯腈共聚物-四氯化锡复合物

Polymer-supported stannic chloride complex catalysts Ⅴ.Copoly(styrene-acrylonitrile)-stannic chloride complex

合成了苯乙烯与丙烯腈的交联共聚物载体,使之与四氯化锡复合并形成一种稳定的复合物。含氯量为21.5%,相当于1.51 mmol/1 g 催化剂。这种复合物对酯化、缩醛、缩酮以及成醚反应均有良好的催化性能。重复使用效果亦佳,至少可重复使用六次而不失活。

The cross-linked polymer carrier beads,styrene-acrylonitrile(13.5%)-divinylbenzene(3%)copolymer,were synthesized and were combinedwith stannic chloride in chloroform to form astable complex containing 21.5% Cl which wasequivalent to 1.51 mmol SnCl_4/g of complexbeads.The complex showed good catalyticactivity for many organic reactions such asesterification,ketal formation,acetalation,andetherification.The catalyst can be reused for atleast six times without losing its catalytic acti-vity.