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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N2—H2A⋯Si	0.86	2.54	3.389 (3)	168
N3—H3B⋯Sii	0.86	2.61	3.395 (3)	153
N3—H3A⋯N1	0.86	2.29	2.641 (4)	105

Symmetry codes: (i) ; (ii) .