Acta Crystallographica Section C

Crystal Structure Communications

Volume 64, Part 10 (October 2008)

organic compounds

 

Supramolecular hydrogen-bonded networks in cytosinium succinate and cytosinium 4-nitrobenzoate cytosine monohydrate

B. Sridhar and K. Ravikumar

Abstract: In cytosinium succinate (systematic name: 4-amino-2-oxo-2,3-dihydropyrimidin-1-ium 3-carboxypropanoate), C₄H₆N₃O⁺·C₄H₅O₄^-, (I), the cytosinium cation forms one-dimensional self-assembling patterns by intermolecular N-HO hydrogen bonding, while in cytosinium 4-nitrobenzoate cytosine monohydrate [systematic name: 4-amino-2-oxo-2,3-dihydropyrimidin-1-ium 4-nitrobenzoate 4-aminopyrimidin-2(1H)-one solvate monohydrate], C₄H₆N₃O⁺·C₇H₄NO₄^-·C₄H₅N₃O·H₂O, (II), the cytosinium-cytosine base pair, held together by triple hydrogen bonds, leads to one-dimensional polymeric ribbons via double N-HO hydrogen bonds. This study illustrates clearly the different alignment of cytosine molecules in the crystal packing and their ability to form supramolecular hydrogen-bonded networks with the anions.

Formula: C₄H₆N₃O⁺·C₄H₅O₄^- and C₄H₆N₃O⁺·C₇H₄NO₄^-·C₄H₅N₃O·H₂O

	Structure factor file (CIF format) (83.7 kbytes) [ doi:10.1107/S010827010802979X/dn3096Isup2.hkl ] Contains datablock I
	Structure factor file (CIF format) (150.3 kbytes) [ doi:10.1107/S010827010802979X/dn3096IIsup3.hkl ] Contains datablock II

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