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研究了2,2’-联吡啶钌配合物RuCl3(2,2’-bipy)(CH3OH)与十六烷基三甲基氯化铵(CTAC)组成的催化体系催化二氧化碳与不同的环氧化合物进行环加成反应制备环状碳酸酯.在此基础上,利用电喷雾质谱(ESI-MS)对RuCl3(2,2’-bipy)(CH3OH)/CTAC催化CO2与环氧丙烷(PO)反应制备碳酸丙烯酯(PC)进行了研究,检测到了反应中间态配合物RuCl3(2,2’-bipy)(PO)与RuCl3(2,2’-bipy)(PC),为该反应机理研究提供了实验证据.研究结果表明,RuCl3(2,2’-bipy)(CH3OH)/CTAC催化体系催化CO2与环氧化合物的反应首先是通过环氧化合物与RuCl3(2,2’-bipy)(CH3OH)中的甲醇分子发生配体交换引发的,经CTAC中的氯离子进攻环氧化合物开环、二氧化碳插入Ru—O键、分子内关环及消去生成环状碳酸酯.
The catalytic system consisting of RuCl3 (2,2’-bipy) (2,2 OH) and cetyltrimethylammonium chloride (CTAC) of 2,2’-dipyridyl ruthenium complex was used to catalyze the reaction of carbon dioxide with different epoxy compounds Cyclic carbonate was prepared by cyclic addition reaction.On the basis of this, the reaction of CO2 with propylene oxide (PO) was catalyzed by RuCl3 (2,2’-bipy) (CH3OH) / CTAC by ESI-MS Preparation of propylene carbonate (PC) was studied, the reaction intermediate complexes RuCl3 (2,2’-bipy) (PO) and RuCl3 (2,2’-bipy) (PC) were detected for the study of the reaction mechanism The experimental results show that the reaction of CO2 with epoxy compounds catalyzed by RuCl3 (2,2’-bipy) (CH3OH) / CTAC catalyzed by epoxides and RuCl3 (2,2’-bipy) (CH3OH ) In the methanol molecule ligand exchange triggered by the CTAC chloride attack epoxy ring open, carbon dioxide inserted Ru-O bond, the molecular ring off and eliminate the formation of cyclic carbonate.