Table 2. π–π Stacking interaction geometry.

Group 1	Group 2	α (°)	DCC (Å)	τ (°)
Cg2	Cg2i	0.0	3.794 (3)	31.30

Symmetry code: (i) 3 − x, 1 − y, 2 − z. α is the dihedral angle between the planes, DCC is the length of the centroid–centroid vector, τ is the angle subtended by the plane normal to CC and Cg2 is the centroid of ring N5/C8–C12.