title: Ethane-1,1,2-trisphosphonic acid hemihydrate.
abstract: Ethane-1,1,2-trisphosphonic acid crystallizes as a hemihydrate, C(2)H(9)O(9)P(3).0.5H(2)O, in which the water O atom lies on an inversion centre in the space group P2(1)/c. The acid component, which contains a short but noncentred O-H...O hydrogen bond, adopts a gauche conformation. The acid components are linked by an extensive series of O-H...O hydrogen bonds to form layers, which are linked into pairs by the water molecules.
authors.affiliation: LCMT, UMR CNRS 6507, ENSICAEN, Université de Caen, 6 boulevard du Maréchal Juin, 14050 Caen, France.
authors.forename: Lise
authors.initials: L
authors.lastname: Delain-Bioton
authors.forename: Jean François
authors.initials: JF
authors.lastname: Lohier
authors.forename: Didier
authors.initials: D
authors.lastname: Villemin
authors.forename: Jana
authors.initials: J
authors.lastname: Sopková-de Oliveira Santos
authors.forename: Gary
authors.initials: G
authors.lastname: Hix
authors.forename: Paul Alain
authors.initials: PA
authors.lastname: Jaffrès
mesh_terms: D018360:Crystallography, X-Ray; D004980:Ethane / Q000031:analogs & derivatives* / Q000737:chemistry; D006860:Hydrogen Bonding; D015394:Molecular Structure; D063065:Organophosphonates / Q000737:chemistry*
chemical_list: D063065:Organophosphonates; C527810:ethane-1,1,2-trisphosphonic acid; D004980:Ethane