Vibrational spectral studies of ion-ion and ion-solvent interactions. I. Zinc nitrate in water |
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| Authors: | Yu-Keung Sze Donald E. Irish |
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| Affiliation: | (1) Guelph-Waterloo Centre for Graduate Work in Chemistry, Waterloo Campus, Department of Chemistry, University of Waterloo, N2L 3G1 Waterloo, Ontario, Canada |
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| Abstract: | Raman and infrared line parameters of Zn(NO3)2-H2O systems ranging from dilute solutions (25°C) to ionic liquids of low water content (75°C) are reported. At 25°C the solutions contain a very low concentration of inner sphere [Zn(ONO2)(H2O)5]+, outer sphere [Zn(H2O)6]2+[NO3]–, Zn(H2O)62+, and NO3– (aq.). In the ionic liquids the ion triplet also exists. Manifestations of a change from the octahedral coordination of zinc to tetrahedral coordination when the water content is very low include the appearance of a 285 cm–1 band from the zinc nitrate bond and a shift to higher frequencies of the band from zinc-water. |
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| Keywords: | Zinc nitrate solvation ion pair Raman and infrared spectroscopy |
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