title: Crystal structure of β-d,l-fructose.
abstract: The title compound, C6H12O6, was crystallized from an aqueous solution of equimolar mixture of d- and l-fructose (1,3,4,5,6-penta-hydroxy-hexan-2-one, arabino-hexulose or levu-lose), and it was confirmed that d-fructose (or l-fructose) formed β-pyran-ose with a (2) C 5 (or (5) C 2) conformation. In the crystal, two O-H⋯O hydrogen bonds between the hy-droxy groups at the C-1 and C-3 positions, and at the C-4 and C-5 positions connect homochiral mol-ecules into a column along the a axis. The columns are linked by other O-H⋯O hydrogen bonds between d- and l-fructose mol-ecules, forming a three-dimensional network.
authors.affiliation: Department of Advanced Materials Science, Faculty of Engineering, Kagawa University, 2217-20 Hayashi-cho, Takamatsu, Kagawa 761-0396, Japan.
authors.forename: Tomohiko
authors.initials: T
authors.lastname: Ishii
authors.affiliation: Department of Advanced Materials Science, Faculty of Engineering, Kagawa University, 2217-20 Hayashi-cho, Takamatsu, Kagawa 761-0396, Japan.
authors.forename: Tatsuya
authors.initials: T
authors.lastname: Senoo
authors.affiliation: Rare Sugar Research Center, Kagawa University, 2393 Ikenobe, Kagawa 761-0795, Japan.
authors.forename: Akihide
authors.initials: A
authors.lastname: Yoshihara
authors.affiliation: Department of Applied Biological Science, Faculty of Agriculture, Kagawa University, 2393 Ikenobe, Kagawa 761-0795, Japan.
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Fukada
authors.affiliation: Department of Chemistry, Faculty of Science, Okayama University of Science, 1-1 Ridaicho, Kita-ku, Okayama 700-0005, Japan.
authors.forename: Genta
authors.initials: G
authors.lastname: Sakane
keywords: crystal structure; hydrogen bonding; racemic compound; rare sugar