 | Acta Crystallographica Section E Acta Crystallographica Section E CRYSTALLOGRAPHIC COMMUNICATIONS |
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![[Figure 2]](tk2261fig2mag.jpg)
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Figure 2
Chains formed by 4,4′-bipyridine and butane-1,2,3,4-tetracarboxylic acid molecules approximately along [![[\overline{3}]](teximages/tk2261fi1.gif) 11]. The hydrogen bonds are shown as dashed lines. The stacking interaction between the 4,4′-bipyridine molecules from the neighbouring chains is denoted with dotted line. The centroids of the interacting rings are denoted with the Cg symbol. Graph symbol (Etter et al., 1990) is given for the described ring motif. Symmetry codes: [iii] −x + 1, −y, −z + 2; [iv] −x + 2, −y, −z + 1; [v] x + 1, y, z; [vi] −x + 3, −y, −z + 1. The disordered part of the BTCA acid molecule as well as H atoms not involved in hydrogen bonds are omitted for clarity. |
![[Figure 2]](tk2261fig2.jpg)
| CRYSTALLOGRAPHIC COMMUNICATIONS |
ISSN: 2056-9890
