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. 2015 Jun 27;71(Pt 7):861–863. doi: 10.1107/S2056989015011780

Table 2. -stacking interactions within (I).

Interaction Cg Cg () Cgperp ()
Cg1Cg1i 3.6206(13) 3.4373(9)
Cg2Cg2i 3.6206(13) 3.3627(9)

Cg1 is the centroid of the 3,5-dicarboxybenzoate ring, Cg2 is the centroid of the 4-hydroxypyridinium ring [symmetry code: (i) x, y, 1+z], Cg Cg is the centroid-to-centroid distance, and Cgperp is the distance to the plane perpendicular to the ring centroid.