Table 4. Hydrogen-bond geometry (Å, °) for II .

Cg3 is the centroid of the pyrazine ring N1/N4/C1/C2/C21/C22, and Cg5 and Cg7 are the centroids of rings C12–C17 and C32–C37, respectively.

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
C6—H6⋯Cg7i	0.94	2.88	3.814 (6)	177
C11—H11B⋯Cg5ii	0.98	2.90	3.540 (5)	124
C26—H26⋯Cg3iii	0.94	2.95	3.544 (5)	122
Zn1—Cl2⋯Cg3iv	2.24 (1)	3.68 (1)	5.8035 (19)	156 (1)

Symmetry codes: (i) ; (ii) ; (iii) ; (iv) .