Structure and vibrational spectroscopy of lithium and potassium methanesulfonates
| Autor: | Matthias J. Gutmann, Stewart F. Parker, Emilie J. Revill-Hivet, Daniel W. Nye |
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| Rok vydání: | 2020 |
| Předmět: |
010504 meteorology & atmospheric sciences
methanesulfonate Potassium chemistry.chemical_element Infrared spectroscopy Salt (chemistry) 010402 general chemistry 01 natural sciences symbols.namesake lcsh:Science infrared spectroscopy 0105 earth and related environmental sciences chemistry.chemical_classification Multidisciplinary Chemistry density functional perturbation theory Potassium methanesulfonate 0104 chemical sciences inelastic neutron scattering spectroscopy Raman spectroscopy symbols Physical chemistry lcsh:Q Lithium Inelastic neutron scattering spectroscopy Research Article Vibrational spectra |
| Zdroj: | Royal Society Open Science Royal Society Open Science, Vol 7, Iss 7 (2020) |
| ISSN: | 2054-5703 |
| Popis: | In this work, we have determined the structures of lithium methanesulfonate, Li(CH3SO3), and potassium methanesulfonate, K(CH3SO3), and analysed their vibrational spectra. The lithium salt crystallizes in the monoclinic space groupC2/mwith two formula units in the primitive cell. The potassium salt is more complex, crystallizing inI4/mwith 12 formula units in the primitive cell. The lithium ion is fourfold coordinated in a distorted tetrahedron, while the potassium salt exhibits three types of coordination: six-, seven- and ninefold. Vibrational spectroscopy of the compounds (including the6Li and7Li isotopomers) confirms that the correlation previously found, that in the infrared spectra there is a clear distinction between coordinated and not coordinated forms of the methanesulfonate ion, is also valid here. The lithium salt shows a clear splitting of the asymmetric S–O stretch mode, indicating a bonding interaction, while there is no splitting in the spectrum of the potassium salt, consistent with a purely ionic material. |
| Databáze: | OpenAIRE |
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