The structure of the complex 5-Fluorocytosinium chloride/5-Fluorocytosine monohydrate has been studied by X-ray diffraction methods. It crystallizes in the monoclinic system, space group P 21 /n, a = 7.1257 (15), b = 8.351 (3), c = 21.520 (4) Å, β = 92.89 (8)°, V = 1279.0 (6) Å3, Z = 4. The structure consists of triple hydrogen-bonded 5-Fluorocytosine pairs, water molecules and chloride anions. Asymmetric reversed Watson-Crick base pairing occurs between one protonated (5FcytH+) and one neutral 5-Fluorocytosine (5Fcyt) molecule.
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CCDC-609444 contains the supplementary crystallographic data for this paper. These data can be obtained free of charge at www.ccdc.cam.ac.uk/conts/data request/cif; by e-mailing data request@ccdc.cam.ac.uk, or by contacting The Cambridge Crystallographic Data Centre (CCDC), 12 Union Road, Cambridge CB2 1EZ, UK; fax: +44(0)1223–336033.
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Portalone, G., Colapietro, M. Asymmetric base pairing in the complex 5-fluorocytosinium chloride/5-fluorocytosine monohydrate. J Chem Crystallogr 37, 141–145 (2007). https://doi.org/10.1007/s10870-006-9169-2
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DOI: https://doi.org/10.1007/s10870-006-9169-2