Crystal structure of beta-D-psicopyranose

摘要

Here, we report the crystal structure of D-psicose, C6H12O6, one of the rare sugars. The compound crystallizes as the beta-anomer with rarely observed in pyranose carbohydrate structures trans-gauche orientation of the hydroxymethyl group relative to the pyranosyl ring. The crystal system is orthorhombic, space group P2(1)2(1)2(1), Z=4, with cell dimensions a=7.727(2), b=8.672(2), c=11.123(3)angstrom, V=745.3(3)angstrom(3). The pyranosyl ring adopts chair C-2(5) conformation. The crystal structure at 100(2) K is stabilized by three-dimensional network of O-H center dot center dot center dot O and C-H center dot center dot center dot O intermolecular hydrogen bonds. (C) 2008 Elsevier Ltd. All rights reserved.