Abstract
Malononitrile reacts in superacidic solutions HF/MF5 (M = As, Sb) with formation of the corresponding salts [H2C(CNX)(2)][MF6](2) (M = As, Sb;X = H, D). The occurrence of double protonation is strongly dependent on the stoichiometric ratio of the Lewis acid with regard to malononitrile. Deuterated species were obtained by replacing hydrogen fluoride with deuterium fluoride. The double protonated salts were characterized by vibrational spectroscopy and in the case of [H2C(CNH)(2)][AsF6](2)center dot HF (3) by a single-crystal X-ray structure analysis. The salt crystallizes in the monoclinic space group P2(1)/c with four formula units per unit cell. The vibrational spectra were compared to quantum chemical calculations of the free cation [(CN)H2C(CNH)](+).
| Item Type: | Journal article |
|---|---|
| Faculties: | Chemistry and Pharmacy > Department of Chemistry |
| Subjects: | 500 Science > 540 Chemistry |
| ISSN: | 0044-2313 |
| Language: | English |
| Item ID: | 54265 |
| Date Deposited: | 14. Jun 2018, 09:55 |
| Last Modified: | 04. Nov 2020, 13:33 |
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