174899-81-1Relevant articles and documents
Structural properties of 1-alkyl-3-methylimidazolium bis{(trifluoromethyl) sulfonyl}amide ionic liquids: X-ray diffraction data and molecular dynamics simulations
Bodo, Enrico,Gontrani, Lorenzo,Caminiti, Ruggero,Plechkova, Natalia V.,Seddon, Kenneth R.,Triolo, Alessandro
, p. 16398 - 16407 (2010)
X-ray diffraction data for 1-alkyl-3-methylimidazolium bis{(trifluoromethyl)sulfonyl}amides are reported as a function of the length of the alkyl chain on the imidazolium ring. The measured diffraction patterns have been compared with the theoretical patterns calculated (from the geometries obtained) with molecular dynamics simulations. This provides a detailed description (at the atomistic level) of the morphology in the liquid state of these salts, highlighting the role played by the alkyl chain length. An analysis of the behavior of the hydrogen bonds that are formed between the imidazolium acidic protons and the anion is presented.
Direct methylation and trifluoroethylation of imidazole and pyridine derivatives
Zhang, Jie,Martin, George Robert,DesMarteau, Darryl D.
, p. 2334 - 2335 (2003)
Direct methylation or trifluoroethylation of imidazole and pyridine derivatives using N-methyl bis((perfluoroalkyl)sul-fonyl)imides or trifluoroethyl phenyliodonium bis((trifluoromethyl)sulfonyl)imide affords high yields of the corresponding salts. This methodology provides a simple route to a variety of room temperature ionic liquids (RTILs).
Preparation method of dialkylimidazole bis(trifluoromethylsulfonyl)imide salt
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Paragraph 0051; 0054-0056, (2020/03/25)
The invention discloses a preparation method of a dialkylimidazole bis(trifluoromethylsulfonyl)imide salt. The method comprises the following steps: 1, reacting alkylimidazole with sulfate in an organic solvent, and layering the obtained solution to obtain a crude dialkylimidazole sulfate product; 2, washing the crude dialkylimidazole sulfate product, carrying out reduced pressure distillation, and drying the obtained product to obtain dialkylimidazole sulfate; 3, reacting the dialkylimidazole sulfate with a bis(trifluoromethylsulfonyl)imide metal salt, and layering the obtained solution to obtain a crude dialkylimidazole bis(trifluoromethylsulfonyl)imide salt product; and 4, washing the crude dialkylimidazole bis(trifluoromethylsulfonyl)imide salt product, carrying out reduced pressure distillation, and drying the obtained product to obtain the target product dialkylimidazole bis(trifluoromethylsulfonyl)imide salt. The method has the advantages of mild reaction conditions, simple operation steps, realization of high yield, high purity and low halogen ion content of the prepared product, and suitableness for promotion and application.
Hydrogen bond in imidazolium based protic and aprotic ionic liquids
Watanabe, Hikari,Doi, Hiroyuki,Saito, Soshi,Matsugami, Masaru,Fujii, Kenta,Kanzaki, Ryo,Kameda, Yasuo,Umebayashi, Yasuhiro
, p. 35 - 42 (2016/05/02)
Liquid structure of bis-(trifluoromethanesulfonyl)amide TFSA- based protic and aprotic ionic liquids composed of imidazolium [h2Im+], N-methylimidazolium [C1hIm+] and N,N'-dimethylimidazolium [C1mIm+] were investigated by high-energy total scattering (HETS) experiments. The nearest neighboring cation-anon orientation variations by the N-methyl groups substitution to proton were suggested based on the peaks at around 6 and 9 ? in the differential radial distribution functions as the form of r2{GX-ray(r) - 1} for these ionic liquids. It was supposed that the NH · · · O hydrogen bond causes the cation-anion orientation variations. To obtain further insight into the hydrogen bond in the PIL, MD simulations performed and agreed well with the experiments. According to spatial distribution functions (SDF) for the three ionic liquids, the O atom of TFSA- prefers the NH hydrogen of the imidazolium that has the most positive partial atomic charge in the cation, while the F atom locates right above and right below the imidazolium ring plane. In addition, the NH · · · O hydrogen bond has short bond lengths and linear bond angles, while the C2H · ·O interaction is long and bent. The NH · · · O hydrogen bond in the PIL was discussed based on structural aspect accompanied by a thermodynamic viewpoint.
