Acta Crystallographica Section C

Crystal Structure Communications

Volume 63, Part 1 (January 2007)

organic compounds

 

The concomitant crystallization of two polymorphs of 1-deoxy--D-tagatose

N. A. Jones, S. F. Jenkinson, R. Soengas, K. Izumori, G. W. J. Fleet and D. J. Watkin

Abstract: The crystalline form of 1-deoxy-D-tagatose, C₆H₁₂O₅, is shown to be 1-deoxy--D-tagatopyranose; the absolute configuration is determined by use of D-lyxono-1,4-lactone as the starting material. The title compound crystallized as concomitant polymorphs from a mixture of ethyl actate and methanol. Although the melting points of the materials differ by 7 K, the molecular conformations are almost identical and, in both polymorphs, each molecule is subject to four O-HO hydrogen bonds.

Formula: C₆H₁₂O₅

	Structure factor file (CIF format) (49.2 kbytes) [ doi:10.1107/S0108270106048591/sk3070Isup2.hkl ] Contains datablock I
	Structure factor file (CIF format) (47.9 kbytes) [ doi:10.1107/S0108270106048591/sk3070IIsup3.hkl ] Contains datablock II

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