Crystal structure of 4-(dimethylamino)-pyridinium 4-aminobenzoate dihydrate

A. Thirunavukkarasu, A. Silambarasan, R M Kumar, P. R. Umarani*, G. Chakkaravarthi, W. T A Harrison (Editor)

*Corresponding author for this work

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In the title hydrated molecular salt, C7H11N2+·C7H6NO2--2H2O, the cation is protonated at the pyridine N atom and the dihedral angle between the benzene ring and the CO2- group in the anion is 8.5 (2)°. In the crystal, the cation forms an N - H⋯O hydrogen bond to the anion and the anion forms two N - H⋯O hydrogen bonds to adjacent water molecules. Both water molecules form two O - H⋯O hydrogen bonds to carboxylate O atoms. In combination, these hydrogen bonds generate a three-dimensional network and two weak C - H⋯π interactions are also observed.

Original languageEnglish
Pages (from-to)o26-o27
Number of pages2
JournalActa Crystallographica Section E: Structure Reports Online
Issue number1
Publication statusPublished - 1 Jan 2015

Bibliographical note

The authors thank SAIF, IIT, Madras for thedata collection.


  • 4-(dimethylamino)pyridinium
  • 4-amino-benzoate
  • Crystal structure
  • Hydrate
  • Hydrogen bonding


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