Crystal structure, thermal analysis and IR spectrometric investigation of the tris(2,6-diaminopyridinium) hydrogen sulfate sulfate monohydrate

Structural studies and cytotoxic activity of a new dinuclear coordination compound of palladium(II)–2,2′:6′,2″‐terpyridine with rigid dianionic 1,2,4‐triazole‐3‐sulfonate linker

“…There is constructive hydrogen bonding between the water hydrogen atoms and sulfonate oxygens (O2 and O3) through O w ─H⋅⋅⋅O hydrogen bonding interactions (Table ). In SO 4 2− counteranion, the lengths of S─O bonds are close to the value of 1.47 Å known from the literature . It should be mentioned that the two S─O bonds (S2─O6 and S2─O4) are slightly shorter than the other S2─O7 and S2─O5 as a result of the hydrogen bonds involving the particular oxygen atoms (Table ).…”

Structural study, vibrational and optical properties, Hirshfeld surface analysis and DFT investigation of a novel organic cation hexachloridostannate(IV), (C5H8N3)2[SnCl6]

“…The selected bond distances and angles are illustrated in Table 2. Corresponding interatomic bond lengths and angles in the two independent cations of the structural unit of the title compound are similar to those obtained in other 2,6diaminopyridinium salts such as [54][55][56]. As it can be seen clearly from Fig.…”

Onium Sulfates and Hydrogen Sulfates: Products of Reactions of Sulfur(IV) Oxide with Aqueous Solutions of Alkylamines and Aniline

“…Table 1 presents the results of analysis of the IR spectra of compounds I-VI. The IR absorption bands of sulfates I, II, and VI and mixed sulfates-hydrogen sulfates IV and V were assigned using published data [19][20][21][22][23][24][25]; the IR and Raman absorption bands (lines) of salt III were assigned taking account of the known experimental and theoretical data [20].…”

“…In comparison with the sulfate anion, an isolated hydrogen sulfate anion has an additional proton, which is bound to one hydrogen; on going from to , the symmetry changes from T d to C 3ν [19,23,25]. In the mixed salts with the (SO 4 HSO 4 ) 3anions [23,25], two tetrahedral groups are linked by a strong hydrogen bond: in the case of symmetric H-bond, the ν 1 vibrations give rise to a singlet absorption band, whereas asymmetric H-bond induces splitting of the ν 1 mode into two components.…”

“…In comparison with the sulfate anion, an isolated hydrogen sulfate anion has an additional proton, which is bound to one hydrogen; on going from to , the symmetry changes from T d to C 3ν [19,23,25]. In the mixed salts with the (SO 4 HSO 4 ) 3anions [23,25], two tetrahedral groups are linked by a strong hydrogen bond: in the case of symmetric H-bond, the ν 1 vibrations give rise to a singlet absorption band, whereas asymmetric H-bond induces splitting of the ν 1 mode into two components. The doublet nature of the ν 1 band in the IR spectra of mixed salts IV and V (1048, 966 cm -1 and 1046, 965 cm -1 ; the splitting is 82 and 81 cm -1 , respectively) attests to asymmetric H-bond in the salt crystals; by analogy with [24,25], the lower-wavelength component of ν 1 corresponds to the hydrogen sulfate anion.…”