title: Crystal structure of potassium (1S)-d-lyxit-1-yl-sulfonate monohydrate.
abstract: The title compound, K(+)·C5H11O8S(-)·H2O [systematic name: potassium (1S,2S,3S,4R)-1,2,3,4,5-penta-hydroxy-pentane-1-sulfonate monohydrate], formed by reaction of d-lyxose with potassium hydrogen sulfite in water, crystallizes as colourless square prisms. The anion has an open-chain structure in which the S atom, the C atoms of the sugar chain and the oxygen atom of the hy-droxy-methyl group form an essentially all-trans chain with the corresponding torsion angles lying between 178.61 (12) and 157.75 (10)°. A three-dimensional bonding network exists in the crystal structure involving coordination of two crystallographically independent potassium ions by O atoms (one cation being hexa- and the other octa-coordinate, with each lying on a twofold rotation axis), and extensive inter-molecular O-H⋯O hydrogen bonding.
authors.affiliation: School of Chemistry, University of East Anglia, Norwich NR4 7TJ, United Kingdom.
authors.forename: Alan H
authors.initials: AH
authors.lastname: Haines
authors.affiliation: School of Chemistry, University of East Anglia, Norwich NR4 7TJ, United Kingdom.
authors.forename: David L
authors.initials: DL
authors.lastname: Hughes
keywords: crystal structure; d-lyxose bis­ulfite adduct; hydrogen bonding; potassium hydrogen sulfite; potassium metabisulfite