Vibrational spectra of perovskite-type layer compounds. Bis(ethylammonium) tetrachlorocadmate and propylenediammonium tetrachlorocadmate
| Autor: | Ian A. Oxton |
|---|---|
| Rok vydání: | 1979 |
| Předmět: |
chemistry.chemical_classification
Phase transition Chemistry Organic Chemistry Analytical chemistry Infrared spectroscopy Salt (chemistry) Symmetry (physics) Analytical Chemistry Inorganic Chemistry Crystallography Molecular motion Layer (electronics) Spectroscopy Perovskite (structure) Vibrational spectra |
| Zdroj: | Journal of Molecular Structure. 54:11-18 |
| ISSN: | 0022-2860 |
| DOI: | 10.1016/0022-2860(79)80050-2 |
| Popis: | The infrared spectra of the perovskite-type layer compounds (CH3CH2NH3)2CdCl4 and (NH3CH2CH2CH2NH3)CdCl4 have been measured at temperatures between ambient and 77 K. The first-order phase transition at 216 K in the former salt was observed and appeared to be associated with changes in hydrogen-bond strength and molecular motions. It is shown, in conjunction with the results of earlier studies, that vibrational spectra of alkylammonium perovskite-layer compounds are determined by factor-group symmetry whilst those of the alkylenediammonium salts are simply dependent upon site-group symmetry. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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