In the title compound, CH4N6, the tetrazole ring is planar to within 0.001
(1) Angstrom. The 5-amino group is conjugated with the pi -system of the te
trazole ring. In contrast, the N atom of the 1-amino group is sp(3) hybridi
zed and is not conjugated with the pi system of the tetrazole ring. All H a
toms are localized at the exocyclic N atoms. The molecules are connected by
N-H . . .N hydrogen bonds, forming an infinite three-dimensional framework
.