Figure 6.

(a) Crystal structure of the IND–NIC cocrystal viewed along the b-axis. (b) Part of the crystal structure, viewed along the c-axis, illustrating the linear hydrogen-bonded chain, running parallel to the b-axis, involving the amide groups of NIC molecules (black lines denote the unit cell repeat along the b-axis; the −CH₂CO₂H moieties of IND molecules are also shown, illustrating the additional hydrogen bonding involving the amide group of NIC). In both panels, hydrogen bonds are indicated by green dashed lines.