Synthesis and structure of fluorosilicic acid compounds with 4-aminobenzoic acid and with 4-aminobenzenesulfonamide

The variations in hydrogen bonding in hexafluorosilicate salts of protonated methyl substituted pyridines and tetramethylethylenediamine

“…Such unperturbed octahedral geometry of the [SiF 6 ] 2À anion can also be found in some other complexes with [SiF 6 ] 2À anion, as observed previously [9,12,14].…”

“…The electrostatic attractive forces between these cations and the anions [SiF 6 ] 2À facilitates the formation of extensive N-HÁ Á ÁF hydrogen-bond interactions [4][5][6][7][8][9][10][11][12][13][14]. The hydrogen bonds between ions are much stronger than between molecules and can play dominant roles in crystal structures [15].…”

“…The hydrogen bonds between ions are much stronger than between molecules and can play dominant roles in crystal structures [15]. This hydrogen-bonding network is prone to incorporate during the crystallization the water molecules which participate in hydrogen bonding [4,9,[12][13][14].…”

“…Most of the known structures with [SiF 6 ] 2À exhibit extensive hydrogen-bonding networks that mainly incorporate all fluorine atoms of [SiF 6 ] 2À [4][5][6][7][8][9][10][11][12][13][14]23]. The nitrogen bases used in syntheses of 1, 2, and 4 are sterically demanding due to methyl groups on the basic nitrogen atom (4) or …”

Interaction of hexafluorosilicic acid with sulfa drugs. Bis(sulfathiazolium) hexafluorosilicate: Spectral data and crystal structure

“…The interaction of hexafluorosilicic acid with sulfa drugs sulfathiazole stz and sulfalen sl [11] [12]. The preparation, spectral and solubility data alongside with the crystal structure for I are reported herein.…”