title: 2-(Tri-methyl-aza-nium-yl)ethyl hydrogen phosphate (phospho-choline) mono-hydrate.
abstract: In the crystal structure of the title compound, C5H14NO4P·H2O, the zwitterionic phospho-choline mol-ecules are connected by an O-H⋯O hydrogen bond between the phosphate groups, forming a zigzag chain along the b-axis direction. The chains are further connected through O-H⋯O hydrogen bonds involving water mol-ecules, forming a layer parallel to (101). Three and one C-H⋯O inter-actions are also observed in the layer and between the layers, respectively. The conformation of the N-C-C-O backbone is gauche with a torsion angle of -75.8 (2)°
authors.affiliation: Department of Biotechnology, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, Japan ; Functional Ionic liquid Laboratories, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Koganei, Japan.
authors.forename: Yohsuke
authors.initials: Y
authors.lastname: Nikawa
authors.affiliation: Department of Biotechnology, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, Japan ; Functional Ionic liquid Laboratories, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Koganei, Japan ; Japan Science and Technology Agency (JST), Core Research for Evolutional Science and Technology (CREST), Chiyoda, Japan.
authors.forename: Kyoko
authors.initials: K
authors.lastname: Fujita
authors.affiliation: Instrumentation Analysis Center, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, Japan.
authors.forename: Keiichi
authors.initials: K
authors.lastname: Noguchi
authors.affiliation: Department of Biotechnology, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, Japan ; Functional Ionic liquid Laboratories, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Koganei, Japan ; Japan Science and Technology Agency (JST), Core Research for Evolutional Science and Technology (CREST), Chiyoda, Japan.
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Ohno