Poly(vinyl chloride) Dechlorination Catalyzed by Zirconium.
Poly(vinyl chloride) Dechlorination Catalyzed by Zirconium.
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锆催化的聚氯乙烯脱氯。
DOI：
10.1002/chem.202304005
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发表时间：
2024
期刊：
影响因子：
--
通讯作者：
Normand AT
中科院分区：
文献类型：
--
作者：
Normand AT
聚氯乙烯在三乙基硅烷（Et 3SiH）和催化量的[Cp 2 Zr（NPh 2）][CH 3 B（C6 F5）3]（1 B）的存在下在40-80 °C下经历脱氯，效率高达91%。以环己基氯为模型进行的化学计量反应性研究表明，1 bdechlorinates PVC的初始氯化物提取，然后通过氢化物转移到阳离子PVC链从Et 3SiH。管道配件、乙烯基圆盘或电缆绝缘材料等消费品会经过脱氯或含羰基共聚物（聚醋酸乙烯酯）或增塑剂（邻苯二甲酸酯）的硅氢化反应。
Poly(vinyl chloride) undergoes dechlorination in the presence of triethylsilane (Et3SiH) and a catalytic amount of [Cp2Zr(NPh2)][CH3B(C6F5)3] (1 b)at 40–80 °C, with up to 91 % efficiency. Stoichiometric reactivity studies conducted on cyclohexyl chloride as a model suggest that1 bdechlorinates PVC by initial chloride abstraction, followed by hydride transfer to the cationic PVC chain from Et3SiH. Consumer items such as pipe fitting, vinyl disc or electric cable insulation undergo either dechlorination or hydrosilylation of the carbonyl‐containing copolymer (polyvinyl acetate) or plasticizer (phthalate).