title: Influence of anion substitution on hydrogen-bonding patterns of salt compounds: cytosinium hydrogen sulfate and cytosinium perchlorate.
abstract: In the two title compounds, cytosinium hydrogen sulfate, C(4)H(6)N(3)O(+).HSO(4)(-), (I), and cytosinium perchlorate, C(4)H(6)N(3)O(+).ClO(4)(-), (II), the asymmetric units comprise a cytosinium cation with hydrogen sulfate and perchlorate anions, respectively. The crystal structures of (I) and (II) are similar; that of (I) is characterized by a three-dimensional N-H...O, O-H...O and C-H...O hydrogen-bonded network. In (I) and (II), two-dimensional layers are formed by N-H...O and C-H...O hydrogen bonds and, in the case of (I), they are linked by O-H...O hydrogen bonds where the anion acts as a donor and the cation as an acceptor. The hydrogen-bonded sheets in (II) form an angle of 87.1 degrees.
authors: Laboratoire de Chimie Moléculaire, du Contrôle de l'Environnement et des Mesures Physico-Chimiques, Faculté des Sciences, Département de Chimie, Université Mentouri de Constantine, 25000 Constantine, Algeria.
authors: Med Abdellatif
authors: MA
authors: Bensegueni
authors: Aouatef
authors: A
authors: Cherouana
authors: Lamia
authors: L
authors: Bendjeddou
authors: Claude
authors: C
authors: Lecomte
authors: Slimane
authors: S
authors: Dahaoui
mesh_terms: D000838:Anions / Q000737:chemistry*; D018360:Crystallography, X-Ray; D003596:Cytosine / Q000737:chemistry*; D006860:Hydrogen Bonding; D010472:Perchlorates / Q000737:chemistry*; D012492:Salts; D013431:Sulfates / Q000737:chemistry*
chemical_list: D000838:Anions; D010472:Perchlorates; D012492:Salts; D013431:Sulfates; D003596:Cytosine; C494474:perchlorate