title: Self-assembled hydrogen-bonded bilayers in 1,4-diazabicyclo[2.2.2]octane-N-(phosphonomethyl)iminodiacetic acid-water (1/1/1.5).
abstract: The title compound is a hydrated salt, 1,4-diazoniabicyclo[2.2.2]octane-N-[(hydroxyphosphinato)methyl]iminiodiacetate-water (1/1/1.5), C(6)H(14)N(2)(2+).C(5)H(8)NO(7)P(2-).1.5H(2)O, in which one of the water molecules lies across a twofold rotation axis in space group P2/n. The ionic components are linked into sheets by a combination of a three-centre N-H...(O)(2) hydrogen bond and two-centre O-H...O and N-H...O hydrogen bonds, and these sheets are pairwise linked by the water molecules into bilayers, by means of further O-H...O hydrogen bonds.
authors.affiliation: School of Chemistry, University of St Andrews, St Andrews, Fife KY16 9ST, Scotland.
authors.forename: Katharine F
authors.initials: KF
authors.lastname: Bowes
authors.forename: George
authors.initials: G
authors.lastname: Ferguson
authors.forename: Christopher
authors.initials: C
authors.lastname: Glidewell
authors.forename: Alan J
authors.initials: AJ
authors.lastname: Lough