title: Crystal structure of 4-amino-5-chloro-2,6-di-methyl-pyrimidinium thio-phene-2,5-di-carboxyl-ate.
abstract: In the title salt, C6H9ClN3 (+)·C6H3O4S(-), the cations and anions are linked via O-H⋯O and N-H⋯O hydrogen bonds, forming R 6 (6)(37) ring motifs that are inter-connected with each other, producing sheets. Separate parallel inversion-related sheets are linked through N-H⋯N and π-π stacking inter-actions [centroid-centroid distance = 3.5414 (13) Å], forming double layers parallel to (101). Weak C-H⋯O and C-H⋯S hydrogen bonds, as well as C-H⋯π inter-actions, connect the double layers into a three-dimensional network.
authors.affiliation: School of Chemistry, Bharathidasan University, Tiruchirappalli 620 024, Tamilnadu, India.
authors.forename: Ammaiyappan
authors.initials: A
authors.lastname: Rajam
authors.affiliation: School of Chemistry, Bharathidasan University, Tiruchirappalli 620 024, Tamilnadu, India.
authors.forename: Packianathan
authors.initials: P
authors.lastname: Thomas Muthiah
authors.affiliation: Department of Chemistry, Howard University, 525 College Street NW, Washington, DC 20059, USA.
authors.forename: Ray J
authors.initials: RJ
authors.lastname: Butcher
authors.affiliation: Department of Chemistry, Youngstown State University, 1 University Plaza, Youngstown, OH 44555, USA.
authors.forename: Matthias
authors.initials: M
authors.lastname: Zeller
keywords: C—H⋯π inter­actions; base-pairing; crystal salts; crystal structure; hydrogen-bonding patterns; π–π stacking