Acta Crystallographica Section C

Volume 65, Part 12 (December 2009)

organic compounds

 

Influence of anion substitution on hydrogen-bonding patterns of salt compounds: cytosinium hydrogen sulfate and cytosinium perchlorate

M. A. Bensegueni, A. Cherouana, L. Bendjeddou, C. Lecomte and S. Dahaoui

Abstract: In the two title compounds, cytosinium hydrogen sulfate, C₄H₆N₃O⁺·HSO₄^-, (I), and cytosinium perchlorate, C₄H₆N₃O⁺·ClO₄^-, (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-HO, O-HO and C-HO hydrogen-bonded network. In (I) and (II), two-dimensional layers are formed by N-HO and C-HO hydrogen bonds and, in the case of (I), they are linked by O-HO 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°.

Formula: C₄H₆N₃O⁺·HSO₄^- and C₄H₆N₃O⁺·ClO₄^-

	Structure factor file (CIF format) (119.0 kbytes) [ doi:10.1107/S0108270109043765/bd3008Isup2.hkl ] Contains datablock I
	Structure factor file (CIF format) (108.1 kbytes) [ doi:10.1107/S0108270109043765/bd3008IIsup3.hkl ] Contains datablock II

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