Table 1. Interaction in three forms of 5-nitro­furazone.

	Form α	Form β	Form γ
Chain structure	N—H⋯O=C	N—H⋯O=C	N—H⋯O=C
	C—H⋯O=C	NH2⋯O=C	C—H⋯O=C
	NH2⋯O=C	Intra NH2⋯N	Intra NH2⋯N
	Inter NH2⋯N		NO2⋯NH2
	NO2⋯NH2		NO2⋯H—C
	NH2⋯O
Plane structure (links between chain structure)	NO2⋯H—C	NO2⋯H—C	NO2⋯H—C
Stacking of planar structures	NH2⋯O=C(dimer)	NO2⋯NH2	π⋯π
	π⋯π	π⋯π