Evidence for the presence of hydrogen-bonded ion-ion interactions in the molten salt precursor, 1-methyl-3-ethylimidazolium chloride

Dymek, Chester J.; Grossie, David A.; Fratini, Albert; Adams, W. Wade

doi:10.1016/0022-2860(89)85103-8

Cited by 146 publications

(145 citation statements)

References 6 publications

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“…For I, II, V, VI, VII, and VIII the melting points were determined by DSC. Suitable single crystals for X-ray crystallography of II were obtained by drying liquid II in high vaccum (10 À5 mbar) at ambient temperature. [33,34] The energies of monomeric and tetrameric ion pairs for all ionic liquids I-VIII were calculated at the Hartree-Fock level, using the internal stored 3-21G basis set of the Gaussian 03 program.…”

Section: Methodsmentioning

confidence: 99%

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The Influence of Hydrogen‐Bond Defects on the Properties of Ionic Liquids

et al. 2011

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Section: Methodsmentioning

confidence: 99%

“…[10][11][12] It is reasonable to assume that the interesting features of the melting points must be related to the formation of structures in the solid and the liquid phases of the ILs. Extended hydrogen-bond networks in the liquid phase were reported with possible implications for both the structure and solvent properties of the ILs.…”

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confidence: 99%

The Influence of Hydrogen‐Bond Defects on the Properties of Ionic Liquids

et al. 2011

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“…Early studies probed the nature of interactions in socalled first-generation chloroaluminate ionic liquids [40], and now also information becomes available for second generation, air-stable systems, such as the imidazolium mixtures. Many RTIL studies have been directed towards possible applications [8, 11, 41]: a number of reports have been published covering theoretical aspects [42][43][44][45][46][47], X-ray crystallography of the frozen melts [48][49][50][51][52], NMR relaxation, conductivity, viscosity, diffusion [4,28,[53][54][55][56][57][58][59], and gas solubilities in ionic liquids [22,60]. Hydrogen-bonding is known to occur between the cations and anions in most ionic liquids, as demonstrated by several investigators on e.g., systems containing 1-alkyl-3-methylimidazolium.…”

Section: N]mentioning

confidence: 99%

Raman Spectroscopy and Ab-Initio Model Calculations on Ionic Liquids

2007

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Summary.A review of the recent developments in the study and understanding of room temperature ionic liquids are given. An intimate picture of how and why these liquids are not crystals at ambient conditions is attempted, based on evidence from crystallographical results combined with vibrational spectroscopy and ab-initio molecular orbital calculations. A discussion is given, based mainly on some recent FT-Raman spectroscopic results on the model ionic liquid system of 1-butyl-3-methylimidazolium ([C 4 mim][X]) salts. The rotational isomerism of the [C 4 mim] þ cation is described: the presence of anti and gauche conformers that has been elucidated in remarkable papers by Hamaguchi et al. Such presence of a conformational equilibrium seems to be a general feature of the room temperature liquids. Then the ''localized structure features'' that apparently exist in ionic liquids are described. It is hoped that the structural resolving power of Raman spectroscopy will be appreciated by the reader. It is of remarkable use on crystals of known different conformations and on the corresponding liquids, especially in combination with modern quantum mechanics calculations. It is hoped that these interdisciplinary methods will be applied to many more systems in the future. A few examples will be discussed.

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“…[10][11][12] Es ist naheliegend anzunehmen, dass das interessante Verhalten der Schmelzpunkte mit der Strukturbildung in fester und flüssiger Phase verknüpft sein muss. Es wurde über erweiterte H-Brücken-Netzwerke in der flüssigen Phase mit möglichen Auswirkungen auf die Struktur und Lösungsmitteleigenschaften der ILs berichtet.…”

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