氯化亚铜-三乙醇胺催化合成1,1,1,3,3-五氯丙烷

以四氯化碳和氯乙烯为原料,在催化剂氯化亚铜和助催化剂三乙醇胺作用下,通过自由基加成反应合成出1,1,1,3,3-五氯丙烷.考察了溶剂、催化剂和助催化剂对合成反应的影响,以及催化剂和助催化剂的相互作用后发现,助催化剂三乙醇胺的使用使反应得率提高了14%以上.用紫外吸收分光光度法检测加入三乙醇胺的Cu2Cl2乙腈溶液,发现波长向紫外方向移动,且随着三乙醇胺加入量的增加,吸光度(ABS值)也随着增加,且吸收最大波长稳定在204 nm;三乙醇胺的加入量与吸光度(ABS)成正比,符合朗伯-比尔定律.研究证实了Cu2Cl2和三乙醇胺络合物的形成.络合物的形成,使溶液中Cu2Cl2的浓度提高,催化活性中心增加,有效的提高了产物得率.

Synthesis of 1,1,1,3,3-pentachloropropane with Catalysis of Cu2Cl2 and Triethaolamine

1,1,1,3,3-pentachloropropane is prepared by radical addition between carbon tetraehloride and vinyl chloride in the presence of Cu2C12 and cocatalyst triethaolamine. The effects of fac- tors such as solvent, catalyst, cocatalyst and the interaction between both on the reaction are inves- tigated. The product yield increases more than 14% by using co-catalyst. The absorbanee of Cu2C12 aeetonitrile solution containing triethaolamine is measured by using a UV method. The experimental results show that the absorption wavelength of the solution shifts to short wave and becomes stable at the maximum wavelength 204nm. The concentration of triethaolamine is proportional to absorbanee in accordance with the Beer-Lambert absorption law. The validated complex formed by Cu2C12 and triethaolamine makes the concentration of Cu2C12 in the solution and the active site of the catalyst increase, which brings about higher product yield effectively.