In the title compound, (C7H11N4)(2)[Ni(H2O)(4)Cl-2]Cl-2. 4H(2)O, the Ni com
plex occupies a special position on the twofold axis; both cation and anion
s, as well as the water molecules, are in general positions. The multiple c
rystallographically independent hydrogen bonds form an infinite three-dimen
sional network in the crystal.