SYNTHESIS, THERMAL STUDIES AND CRYSTAL STRUCTURE OF 4-AMINOPYRIDINIUM SEMI-OXALATE HEMIHYDRATE

  • CECILIA CHACÓN
    National Polytechnic Institute, Center for Applied Science and Advanced Technology, México D.F. 11500, México
  • JULIA BRUNO-COLMENÁREZ
    Venezuelan Institute of Scientific Research (IVIC), Center for Research in Materials Technology and Environment, Maracaibo, Venezuela
  • OAZAIZULFAZLI JAMALIS
    University of Technology Malaysia, Faculty of Science, Department of Chemistry, 81310 Johor Bahru, Johor, Malaysia
  • GERZON E. DELGADO
    University of the Andes, Faculty of Science, Department of Chemistry, Crystallography Laboratory, Mérida 5101, Venezuela

Abstract

The title compound has been synthesized by grinding in an agate mortar. Its structure was characterized by TGA-DSC studies and single-crystal X-ray diffraction. This compound crystallize in the monoclinic system with space group C2/c, Z = 4, and unit cell parameters a = 16.109(2) Å, b = 5.748(7) Å, c = 20.580(3) Å, β = 107.36(1)°. The salt, C2HO4-.C5H7N+.0.5 H2O, is an ionic ensemble assisted by hydrogen bonds established between 4-aminopyridinium cations, oxalate anions and water molecules. The three components thus construct a supramolecular assembly with a three-dimensional hydrogen bonded framework.

Cuvinte cheie

hydrogen bonding patterns multicomponent crystal X-ray diffraction