title: Hydrogen-bonding and pi-pi interactions in 2-amino-4,6-dimethylpyrimidinium salicylate.
abstract: In the crystal structure of the title compound, C6H10N3+.C7H5O3-, the asymmetric unit contains four crystallographically independent 2-amino-4,6-dimethylpyrimidinium and salicylate ions (Z = 8). In each of these, one of the pyrimidine N atoms is protonated, and the carboxylate group of the salicylate ion interacts with the pyrimidine group through a pair of N-H...O hydrogen bonds, forming an R2(2)(8) motif. The pyrimidine cations also form base pairs via a pair of N-H...N hydrogen bonds (involving the amino group and the unprotonated ring N atom), forming another R2(2)(8) motif. Three such R2(2)(8) motifs, fused together, constitute a closed cyclic aggregate, and the linking of these aggregates, arranged in consecutive layers, can be analysed in terms of off-face stacking interactions.
authors.affiliation: School of Chemistry, Bharathidasan University, Tiruchirappalli 620 024, Tamilnadu, India. tommtrichy@yahoo.co.in
authors.forename: Packianathan Thomas
authors.initials: PT
authors.lastname: Muthiah
authors.forename: Kasthuri
authors.initials: K
authors.lastname: Balasubramani
authors.forename: Urszula
authors.initials: U
authors.lastname: Rychlewska
authors.forename: Agnieszka
authors.initials: A
authors.lastname: Plutecka
mesh_terms: D018360:Crystallography, X-Ray; D006860:Hydrogen Bonding; D008958:Models, Molecular; D015394:Molecular Structure; D011743:Pyrimidines / Q000737:chemistry*; D012459:Salicylates / Q000737:chemistry*
chemical_list: C519935:2-amino-4,6-dimethylpyrimidinium; D011743:Pyrimidines; D012459:Salicylates