Acta Cryst. (2001). E57, o895-o897  [ doi:10.1107/S1600536801013666 ]

The 1:1 proton-transfer complex of 3,5-dinitrosalicylic acid with (8-quinolinyl)urea

G. Smith, R. C. Bott and U. D. Wermuth

Abstract: In the crystal structure of the proton-transfer complex of (8-quinolinyl)urea (QUR) with 3,5-dinitrosalicylic acid (DNSA), 8-ureidoquinolinium 3,5-dinitrosalicylate, [(QUR)⁺ (DNSA)^-] or C₁₀H₁₀N₃O⁺·C₇H₃N₂O₇^-, the hetero-N atom of QUR is protonated and, together with all urea protons, is involved in extensive hydrogen-bonding associations which result in a three-dimensional network polymer [NO 2.711-3.251  (2)  Å]. In addition, the quinolinium proton is involved in an intramolecular hydrogen bond with a urea-N atom [N-N 2.841  (2)  Å] and within the DNSA anions a short intramolecular O(carboxyl)O(hydroxy) hydrogen bond is also present [OO 2.492  (2)  Å].

Online 31 August 2001

Copyright © International Union of Crystallography
IUCr Webmaster