Hexafluorosilicates of 2-substituted anilinium derivatives |
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| Authors: | V. O. Gel’mbol’dt E. V. Ganin L. V. Koroeva L. Kh. Minacheva V. S. Sergienko A. A. Ennan |
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| Affiliation: | (1) Physicochemical Institute for Human and Environmental Protection, Education and Science Department, National Academy of Sciences of Ukraine, Odessa State University, Odessa, Ukraine;(2) Odessa State Ecological University, Odessa, Ukraine;(3) Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow, 117907, Russia |
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| Abstract: | The reaction of 45% fluorosilicic acid with methanol solutions of several 2-substituted anilines(L) gave hexafluorosilicates (LH)2SiF6. The products were studied by elemental analysis, IR spectroscopy, mass spectrometry, and thermogravimetry. The solubility and the hydrolytic stability of the salts were estimated. The structure of the complex [CH3O(O)CC6H4NH3]2SiF6 was determined by single-crystal X-ray diffraction. The ionic structure is composed of centrosymmetric SiF 6 2? anions (the average Si-F bond length is 1.679(1) Å) and the [CH3O(O)CC6H4NH3]+ cations. The NH 3 + group is the donor for the inner-cation H-bond with the carbonyl oxygen atom (NH···O), and for two ion-ion H-bonds (NH···F). The Si-F bond lengths correlate with the strengths of the H-bonds involving the corresponding fluorine atoms. |
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