title: Cyclo-hexane-1,4-dicarb-oxy-lic acid-pyridinium-4-olate (1/1).
abstract: In the title adduct, C5H5NO·C8H12O4, the heterocycle exists in its zwitterionic form. The cyclo-hexane ring exhibits a chair conformation with the carb-oxy-lic acid groups in equatorial and axial orientations. In the crystal, mol-ecules are linked through charge-assisted O-H⋯O(-), N(+)-H⋯O(-) and N(+)-H⋯O hydrogen bonds, and an additional series of C-H⋯O contacts, giving a pleated two-dimensional hydrogen-bonded network parallel to (-204).
authors: Facultad de Ingenieria Mochis, Universidad Autónoma de Sinaloa, Fuente Poseidón y Prol. A. Flores S/N, CP 81223, C.U. Los Mochis, Sinaloa, México.
authors: Adriana
authors: A
authors: Cruz-Enríquez
authors: Hector J
authors: HJ
authors: Peinado-Guevara
authors: Viviana
authors: V
authors: Reyes-Marquez
authors: Herbert
authors: H
authors: Höpfl
authors: José J
authors: JJ
authors: Campos-Gaxiola
references: Acta Crystallogr A. 2008 Jan;64(Pt 1):112-22
references: 18156677
references: Acta Crystallogr Sect E Struct Rep Online. 2012 Jul 1;68(Pt 7):o1989
references: 22807822