ABSTRACT
In the title compound, C23H18N3O3 (+)·CF3SO3 (-), the asymmetric unit contains two crystallographically independent organic cations with similar conformations. Each cation shows a moderate distortion between the planes of the amide groups and the quinolinium rings with dihedral angles of 14.90â (2) and 31.66â (2)°. The quinolinium and phenyl rings are slightly twisted with respect to each other at dihedral angles of 6.99â (4) and 8.54â (4)°. The tri-fluoro-methane-sulfonate anions are linked to the organic cations via N-Hâ¯O hydrogen-bonding inter-actions involving the NH amide groups. In the crystal, the organic cations are linked by weak C-Hâ¯O(nitro group) inter-actions into supramol-ecular chains propagating along the b-axis direction.
ABSTRACT
In the centrosymmetric title compound, C26H16N4O4 {systematic name: 6,13-bis-[(pyridin-4-yl)meth-yl]-6,13-di-aza-tetra-cyclo-[6.6.2.0(4,16)0(11,15)]hexa-deca-1,3,8,10,15-pantaene-5,7,12,14-tetrone}, the central ring system is essentially planar [maximum deviation = 0.0234â (8)â Å] and approximately perpendicular to the terminal pyridine ring [dihedral angle = 84.38â (3)°]. The mol-ecules displays a trans conformation with the (pyridin-4-yl)methyl groups on both sides of the central naphthalene di-imide plane. In the crystal, mol-ecules are linked by π-π stacking between parallel pyridine rings [centroid-centroid distances = 3.7014â (8) and 3.8553â (8)â Å] and weak C-Hâ¯O hydrogen bonds, forming a three-dimensional supra-molecular architecture.
