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 in...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℃.展开更多
基金Supported by the Key Scientific Research Plan Projects of Henan Province(No.18A150024)Innovation and entrepreneurship support program for college students of Minsheng College,Henan University(No.MSCXCY2018006)。
文摘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℃.
