39879-60-2Relevant academic research and scientific papers
Crystal structure, phase transition, and disorder in pyridinium methanesulfonate
Jesariew, Dominik,Ilczyszyn, Maria M.
, p. 304 - 314 (2017)
Thermal analysis, X-ray diffraction and vibrational spectroscopy have been used to investigate pyridinium methanesulfonate in order to verify its crystal structure and to have insight into its anomalous dynamical properties. This compound undergoes a solid-solid, reversible phase transition at 255.8/266.8 K (cooling/heating). It crystallizes in non-centrosymmetric Pna21 space group at the high-temperature phase (I) and in centrosymmetric Pbca one at the low-temperature phase (II). The entropy gain occurred at the II→I transition has shown that two independent orientations of ions in the disorder phase (I) are allowed. Infrared spectra have confirmed that the pyridinium cation as well as the –CH3 group of the anion exhibit changes in their dynamics when entering the phase I. These spectra have also suggested residual disorder of both, the pyridinium cation and the –CH3 group, in the low temperature phase (II).
IONIC LIQUID CONTAINING ALLYLSULFONATE ANION
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Page/Page column 21, (2012/06/30)
PROBLEM: Providing a novel ionic liquid, which is low-cost, environment-friendly, and has low viscosity and melting point. MEANS FOR SOLVING THE PROBLEM: The present invention is the invention of the ionic liquid represented by the general formula [1]: {wherein, R1 to R3 and n pieces of R4 each independently represent hydrogen atom or alkyl group having 1 to 4 carbon atoms, R5 to R7 each independently represent alkyl group, aralkyl group, or aryl group, R8 represents alkyl group, aralkyl group, aryl group, or the one represented by the general formula [2]: (wherein T represents alkylene chain having 1 to 8 carbon atoms, n represents 1 or 2, and R1 to R7 are the same as the above-described), X represents nitrogen atom or phosphorus atom, n represents 1 or 2. When n is 1, R3 and R4 are bound and may form cyclohexene ring together with the adjacent carbon atoms. In addition, when X is nitrogen atom, R5 to R7 or R5 to R6 may form hetero ring with nitrogen atom binding thereto}.
Pseudohalides of boron subphthalocyanine
Paton, Andrew S.,Morse, Graham E.,Castelino, David,Bender, Timothy P.
experimental part, p. 2531 - 2536 (2012/05/31)
The synthesis and study of a series of pseudohalides of boron subphthalocyanine (BsubPc) are reported. Each pseudohalide has been compared to the more common chloride and bromide of BsubPc, and we have found that most react slower under standard phenoxyla
