Acta Cryst. (2005). E61, o1377-o1380  [ doi:10.1107/S160053680501144X ]

1-(4-Methylpiperdinemethyl)-2-(4-bromophenyl)-6-methyl-8-trifluoromethylimidazo[1,2-a][1,8]naphthyridinium picrate

C. Muthamizhchelvan, K. Saminathan, K. SethuSankar, J. Fraanje, R. Peschar and K. Sivakumar

Abstract: The title molecular complex, C₂₅H₂₅BrF₃N₄⁺·C₆H₂N₃O₇^-, crystallizes with two pairs of cations and anions in the asymmetric unit. While the orientations of the two cations are nearly parallel to one another, this is not so for the anions. The imidazonaphthyridine moiety is planar and the methylpiperidine group is approximately perpendicular to it and adopts an ideal chair conformation. The planes of the bromophenyl rings deviate from the planes of the imidazonaphthyridine moieties by 30.2 (2) and 22.6 (3)° in the two cations, making a marked difference in the overall conformation of the cations. The N-HN hydrogen bond forms an intramolecular ring pattern S(7) in both cations. The anions and cations are connected through N-HO, C-HO and C-HF hydrogen bonds.

Online 16 April 2005

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