title: 2,6-Di-amino-4-chloro-pyrimidinium 4-carb-oxy-butano-ate.
abstract: In the title mol-ecular salt, C4H6ClN4 (+)·C5H7O4 (-), the cation is essentially planar, with a maximum deviation of 0.037 (1) Å for all non-H atoms. The anions are self-assembled through O-H⋯O hydrogen bonds, forming a supra-molecular zigzag chain with graph-set notation C(8). In the crystal, the protonated N atom and the 2-amino group of the cation are hydrogen bonded to the carboxyl-ate O atoms of the anion via a pair of N-H⋯O hydrogen bonds with an R 2 (2)(8) ring motif. This motif further self-organizes through N-H⋯O and O-H⋯O hydrogen bonds, generating an array of six hydrogen bonds, the rings having graph-set notation R 3 (2)(8), R 2 (2)(8), R 4 (2)(8), R 2 (2)(8) and R 3 (2)(8). In addition, another type of R 2 (2)(8) motif is formed by inversion-related pyrimidinium cations via N-H⋯N hydrogen bonds, forming a two-dimensional network parallel to (101).
authors.affiliation: Department of Chemistry, Government Arts College (Autonomous), Thanthonimalai, Karur 639 005, Tamil Nadu, India.
authors.forename: Bellarmin
authors.initials: B
authors.lastname: Edison
authors.affiliation: Department of Chemistry, Government Arts College (Autonomous), Thanthonimalai, Karur 639 005, Tamil Nadu, India.
authors.forename: Kasthuri
authors.initials: K
authors.lastname: Balasubramani
authors.affiliation: School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia.
authors.forename: Kaliyaperumal
authors.initials: K
authors.lastname: Thanigaimani
authors.affiliation: School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia.
authors.forename: Nuridayanti Che
authors.initials: NC
authors.lastname: Khalib
authors.affiliation: School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia.
authors.forename: Suhana
authors.initials: S
authors.lastname: Arshad
authors.affiliation: School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia.
authors.forename: Ibrahim Abdul
authors.initials: IA
authors.lastname: Razak
keywords: crystal structure