Acta Cryst. (2003). E59, o495-o497  [ doi:10.1107/S160053680300552X ]

The 2:1 complex of 4-aminobenzoic acid and 4,4'-bipyridyl N,N'-dioxide

R. Moreno-Fuquen, M. Font i Carot, M. Garriga, F. Cano, M. Martinez-Ripoll, J. Valderrama-Naranjo and L. M. Serratto

Abstract: The co-crystal C₁₀H₈N₂O₂·2C₇H₇NO₂ owes its formation to an intermolecular hydrogen bond between the O-H and N-O groups; the OO distance is 2.5796  (17)  Å. The dihedral angle between the planes of the pyridyl N-oxide and aminobenzoic rings of the complex is 10.2  (1)°. An additional intermolecular C-HO hydrogen bond is formed, giving rise to an eight-membered ring within the asymmetric unit. The structure is centrosymmetric about the mid-point of the bond joining the two pyridine rings. The crystal structure exhibits overlap between the aromatic rings of the molecules in the [10] direction.

Online 21 March 2003

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