title: Guanidinium 3-carb-oxy-2,3-dihydroxy-propanoate monohydrate.
abstract: In the title hydrated salt, CH(6)N(3) (+)·C(4)H(5)O(6) (-)·H(2)O, the deprotonated carboxyl group is disordered over two positions with a site-occupancy ratio of 0.945 (3):0.055 (3). The bond lengths in the guanidinium cation are inter-mediate between normal C-N and C=N bond lengths, indicating significant delocalization in this species. In the crystal structure, anions and water mol-ecules are linked into sheets parallel to the ab plane by inter-molecular O-H⋯O hydrogen bonds. The linking of the anions and water mol-ecules with the cations by inter-molecular N-H⋯O hydrogen bonds creates a three-dimensional network.
authors.forename: Mohammad T M
authors.initials: MT
authors.lastname: Al-Dajani
authors.forename: Hassan H
authors.initials: HH
authors.lastname: Abdallah
authors.forename: Nornisah
authors.initials: N
authors.lastname: Mohamed
authors.forename: Jia Hao
authors.initials: JH
authors.lastname: Goh
authors.forename: Hoong-Kun
authors.initials: HK
authors.lastname: Fun