Synthesis, Crystal Structure of Protic Pyrazolium Ionic Liquid and Its Catalytic Properties for CO<sub>2 </sub>Cycloaddition

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Abstract Two protic pyrazolium ionic liquids (ILs) are synthesized and characterized by mass spectra (MS), 1H NMR, 13C NMR, and single-crystal X-ray diffraction. Then, their catalytic activity for the cycloaddition of PO and CO2 is investigated. Two protic pyrazolium ILs are the orthorhombic and triclinic systems of space groups Cmca and C2/c for HTMPzBr and HDMPzBr, respectively. They could catalyze the cycloaddition reaction of carbon dioxide (CO2) with epoxides (PO) to produce cyclic carbonate (PC) without any solvent and co-catalyst and show strong catalytic activity when the reaction temperature is over 110 ℃.

Key words： protic pyrazolium ionic liquids carbon dioxide epoxide cyclic carbonate crystal structure

Received: 17 June 2019 Published: 13 April 2020

Fund:Supported by the Key Scientific Research Plan Projects of Henan Province (No. 18A150024) and Innovation and entrepreneurship support program for college students of Minsheng College, Henan University (No. MSCXCY2018006)

Corresponding Authors: tzgncl@henu.edu.cn E-mail: tzgncl@henu.edu.cn

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	REN Yu-Xuan
	WANG Shuai-Tao
	ZHANG Chen-Xu
	WANG Huan-Ming
	LI Gui-Hui

Cite this article:

REN Yu-Xuan,WANG Shuai-Tao,ZHANG Chen-Xu, et al. Synthesis, Crystal Structure of Protic Pyrazolium Ionic Liquid and Its Catalytic Properties for CO₂ Cycloaddition[J]. CHINESE JOURNAL OF STRUCTURAL CHEMISTRY, 2020, 39(4): 801-808.

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http://manu30.magtech.com.cn/jghx/EN/ OR http://manu30.magtech.com.cn/jghx/EN/Y2020/V39/I4/801

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