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Synthesis and structure of fluorosilicic acid compounds with 4-aminobenzoic acid and with 4-aminobenzenesulfonamide: The role of H-bonding in crystal structure formation |
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| Authors: | VO Gelmboldt EdV Ganin MS Fonari MM Botoshansky |
| Institution: | a Physico-Chemical Institute of Environment and Human Protection of the Ministry of Education and Science of Ukraine and National Academy of Sciences of Ukraine, 65026 Odessa, Ukraine b Odessa State Environmental University, Ministry of Education and Science of Ukraine, Odessa, Ukraine c Institute of Applied Physics, Academy of Sciences of Moldova, Academy street, 5 MD 2028 Chisinau, Moldova d Department of Chemistry, Technion-Israel Institute of Technology, Technion City, 32000 Haifa, Israel |
| Abstract: | Preparation and characterization of the ammonium hexafluorosilicate salts, 2R]+SiF6]2− (R = 4-(aminosulfonyl)benzenammonium) (1), and 2R]+SiF6]2−.4H2O (R = 4-carboxybenzenammonium), (2), are described. These salts, prepared from the reaction of the 4-aminobenzenesulfonamide or the 4-aminobenzoic acid with fluorosilicic acid, were characterized by IR, mass spectrometry and X-ray diffraction. 1 and 2 crystallize in monoclinic crystal system (space group P21/c and P21/n, respectively), with Z = 2 in both cases. Compounds exhibit an extensive system of hydrogen bonding. |
| Keywords: | Hexafluorosilicate Aromatic amines Hydrogen bonding Crystal structure |
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