Ab initio study of the selective alkylation of m-cresol with tert-butanol catalyzed by SO3H-functionalized ionic liquids
作者:Jinxia Zhou、Xiumei Liu、Shuguang Zhang、Jingbo Mao、Xinwen Guo
DOI:10.1016/j.cattod.2009.07.089
日期:2010.1
catalytic alkylation of m-cresol with tert-butanol (TBA) SO3H-functionalized ionic liquids exhibited several characteristic advantages over conventional catalysts. This work investigated the reaction mechanism of the alkylation of m-cresol with tert-butanol catalyzed by the SO3H-functionalized ionic liquid (IL) through quantum chemical calculation in combination with the experimental studies. The experimental
我们以前的工作表明,用叔丁醇(TBA)催化间甲酚进行烷基化的SO 3 H官能化离子液体与常规催化剂相比,具有几个特征性优点。这项工作研究了SO 3催化间甲酚与叔丁醇烷基化的反应机理。通过量子化学计算和实验研究相结合的H-官能化离子液体(IL)。实验结果表明2-叔丁基-5-甲基苯酚(2-TBC),4-叔丁基-3-甲基苯酚(4-TBC)和叔丁基间甲酚醚(TBMCE)产品所有主要产品,而2,6-二叔丁基-3-甲基苯酚(2,6-DTBC)是次要产品。计算结果表明,产物的选择性取决于反应位点的基本性质,包括叔丁基离子([tC 4 H 9 ] +相互作用中的轨道重叠,库仑和空间效应。)和间甲酚;TBMCE在动力学上受到青睐,但在热力学上不稳定,而C烷基化产物,尤其是2-TBC是在热力学上优选的产物。IL在由TBA产生[tC 4 H 9 ] +和由中间体产生最终产物中发挥了重要作用。