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Figure 3 . A view of the extensive π–π stacking interactions (dashed lines) between aromatic rings of 9-aminoacridinium ions and the C—O⋯π interaction (dashed line) between C7—O3 and the centroid of the pyridyl ring of a neighboring pydc ligand. [Distances: (i) 3.336; (ii) 3.834; (iii) 3.429; (iv) 3.621; (v) 3.562 Å.] |