Table 1. Hydrogen-bond geometry (Å, °).

Cg is the centroid of the N,C1–C5 ring.

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
C4—H4⋯Ni	0.925 (17)	2.464 (18)	2.809 (2)	102.3 (12)
C6—H6A⋯Cgii	0.990 (19)	2.59	3.5089 (16)	155

Symmetry codes: (i) ; (ii) .