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Figure 2 A perspective view of the packing of (I) in the unit cell viewed down the approximate a axial direction, showing the π-stacked quinolinium cations inside the citrate convoluted sheet substructures. Hydrogen-bonding interactions are shown as dashed lines and non- interactive hydrogen atoms are omitted: symmetry codes: (iii) x + 1, y, z; (iv) −x − , y − , −z + ; For other codes see Table 1. |