title: 10-Ethyl-4-oxo-2,3,4,10-tetrahydropyrimido[4,5-b]quinolin-2-iminium 4-toluenesulfonate: a polarized electronic structure in the cation and a hydrogen-bonded sheet structure.
abstract: In the title compound, C(13)H(13)N(4)O(+).C(7)H(7)O(3)S(-), the bond distances within the cation provide evidence for the delocalization of the positive charge in a manner reminiscent of guanidinium cations. Three independent N-H...O hydrogen bonds link the ions into centrosymmetric four-ion aggregates, and these are further linked into sheets by a single C-H...O hydrogen bond. This study shows how a single hydrogen bond can link centrosymmetric entities into a continuous sheet structure.
authors.affiliation: Departamento de Química, Universidad de Valle, AA 25360 Cali, Colombia.
authors.forename: Jorge
authors.initials: J
authors.lastname: Trilleras
authors.forename: Jairo
authors.initials: J
authors.lastname: Quiroga
authors.forename: John N
authors.initials: JN
authors.lastname: Low
authors.forename: Justo
authors.initials: J
authors.lastname: Cobo
authors.forename: Christopher
authors.initials: C
authors.lastname: Glidewell
mesh_terms: D002412:Cations / Q000737:chemistry; D003461:Crystallography; D004583:Electrons; D006860:Hydrogen Bonding; D011743:Pyrimidines / Q000737:chemistry*; D011804:Quinolines / Q000737:chemistry*
chemical_list: C531927:10-ethyl-4-oxo-2,3,4,10-tetrahydropyrimido(4,5-b)quinolin-2-iminium; D002412:Cations; D011743:Pyrimidines; D011804:Quinolines