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(NiCl3)2N2 crystallizes in the hexagonal P6_3/mmc space group. The structure is one-dimensional and consists of two ammonia molecules and one NiCl3 ribbon oriented in the (0, 0, 1) direction. In the NiCl3 ribbon, Ni2+ is bonded to six equivalent Cl1- atoms to form face-sharing NiCl6 octahedra. All Ni–Cl bond lengths are 2.28 Å. Cl1- is bonded in a distorted L-shaped geometry to two equivalent Ni2+ atoms.
Ni(N3Cl)2 crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Ni4+ is bonded to six equivalent N+0.33- atoms to form NiN6 octahedra that share faces with eight equivalent ClN12 cuboctahedra. All Ni–N bond lengths are 1.83 Å. N+0.33- is bonded in a single-bond geometry to one Ni4+ and four equivalent Cl1- atoms. All N–Cl bond lengths are 2.76 Å. Cl1- is bonded to twelve equivalent N+0.33- atoms to form ClN12 cuboctahedra that share corners with twelve equivalent ClN12 cuboctahedra, faces with six equivalent ClN12 cuboctahedra, and faces with four equivalent NiN6 octahedra.
NiCl4NiNCl4(N2)5 crystallizes in the orthorhombic Pmmm space group. The structure is one-dimensional and consists of four ammonia molecules; two triazane molecules; one NiCl4 cluster; and one NiNCl4 ribbon oriented in the (1, 0, 0) direction. In the NiCl4 cluster, Ni+2.50+ is bonded in a square co-planar geometry to four equivalent Cl1- atoms. All Ni–Cl bond lengths are 2.20 Å. Cl1- is bonded in a single-bond geometry to one Ni+2.50+ atom. In the NiNCl4 ribbon, Ni+2.50+ is bonded in a distorted square co-planar geometry to four equivalent Cl1- atoms. All Ni–Cl bond lengths are 2.27 Å. N+0.27+ is bonded in a square co-planar geometry to four equivalent Cl1- atoms. All N–Cl bond lengths are 2.14 Å. Cl1- is bonded in an L-shaped geometry to one Ni+2.50+ and one N+0.27+ atom.