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![[Figure 2]](fg3197fig2mag.jpg)
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Figure 2
(a) Extended representation of the unit-cell contents of (I) ![[link]](../../../../../../logos/arrows/c_arr.gif) , viewed approximately down [010]. Three one-dimensional chains parallel to [001] are illustrated, with bifurcated hydrogen bonds (dashed lines; orange in the electronic version of the paper) linking neighbouring molecules. (b) A view of the packing diagram in (a), approximately down [001], highlighting the columnar nature of the hydrogen-bonded chains. (c) An illustration of the unconventional bifurcated hydrogen bonds (dashed lines; pink) between pyridine C—H donors and the carbonyl O atoms that are not involved in the hydrogen bonds within the one-dimensional chains shown in (a). These hydrogen bonds crosslink the columns shown in (b). Only selected interactions are shown for clarity. Atoms involved in hydrogen bonds are shown as balls of arbitrary radii. All other atoms and covalent bonds are represented as cylinders. |
![[Figure 2]](fg3197fig2.jpg)
 | STRUCTURAL CHEMISTRY |
ISSN: 2053-2296
