2.1. Crystal data

The title compound, C12H9N3O2, adopts an E conformation at the imine double bond. The pyridyl ring makes a dihedral angle of 47.78 (5) with the benzene ring, indicating the molecule is twisted. In the crystal, molecules are – stacked into columns parallel to [100], with an interplanar separation of 3.8537 (8) Å, corresponding to the length of the a axis. The chains are further linked via weak C—H O and C—H N hydrogen bonds, forming two-dimensional sheets parallel to (010). The sheets interact by van der Waals interactions