organic compounds
Open access
There are two independent molecules in the asymmetric unit of the title compound, C12H9N5, in which the C—N(amine)—C angles differ slightly [129.63 (11) and 132.02 (11)°]. In each independent molecule, an intramolecular C—HN hydrogen bond stabilizes the molecular structure, forming an S(6) ring motif. The independent molecules are linked via an N—HN hydrogen bond. Further N—HN and C—HN hydrogen bonds connect the molecules into chains along c axis. Pairs of C—Hπ interactions between the chains lead to sheets parallel to the b axis. These are linked by π–π interactions between the naphthyridine and pyrazine rings [centroid–centroid separations of 3.553 (8) Å] into a three-dimensional supramolecular network.
organic compounds
Open access
The asymmetric unit of the title compound, C12H9N3, contains two independent molecules in which the dihedral angle between the pyridine and azaindole rings are 8.23 (6) and 9.89 (2)°. In the crystal, both types of molecule are connected by pairs of N-H-N hydrogen bonds into inversion dimers.