Abstract
CRYSTALS of the hydrochloride monohydrate of the important amino-acid histidine can be obtained as rather thick tablets by evaporation of aqueous solutions containing a little hydrochloric acid. X-ray examination shows that the crystals are orthorhombic, with unit cell edges a = 15.36 A., b = 8.92 A. and c 6.88 A. The space group is P212121, and there are four molecules in the unit cell. The structure was obtained from a three-dimensional Patterson function which was interpreted by means of the vector convergence method1.
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References
Beevers, C. A., and Robertson, J. H., Acta Cryst., 3, 164 (1950).
Hughes, E. W., J. Amer. Chem. Soc., 63, 1737 (1941).
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DONOHUE, J. Crystal Structure of Histidine Hydrochloride Monohydrate. Nature 171, 258 (1953). https://doi.org/10.1038/171258a0
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DOI: https://doi.org/10.1038/171258a0
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