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ZnCN2 crystallizes in the tetragonal I-42d space group. The structure is three-dimensional. Zn2+ is bonded to four equivalent N3- atoms to form corner-sharing ZnN4 tetrahedra. There are two shorter (2.01 Å) and two longer (2.06 Å) Zn–N bond lengths. C4+ is bonded in a linear geometry to two equivalent N3- atoms. Both C–N bond lengths are 1.23 Å. N3- is bonded in a trigonal planar geometry to two equivalent Zn2+ and one C4+ atom.
Zn(CN)2 is Tungsten structured and crystallizes in the tetragonal P4_2nm space group. The structure is zero-dimensional and consists of two Zn(CN)2 clusters. Zn2+ is bonded in a water-like geometry to two equivalent N3- atoms. Both Zn–N bond lengths are 1.99 Å. C2+ is bonded in a single-bond geometry to one N3- atom. The C–N bond length is 1.17 Å. N3- is bonded in a linear geometry to one Zn2+ and one C2+ atom.
Zn(CN)2 is Tungsten structured and crystallizes in the cubic P-43m space group. The structure is zero-dimensional and consists of one Zn(CN)4 cluster and one zinc molecule. In the Zn(CN)4 cluster, Zn2+ is bonded in a tetrahedral geometry to four equivalent N3- atoms. All Zn–N bond lengths are 1.97 Å. C2+ is bonded in a single-bond geometry to one N3- atom. The C–N bond length is 1.17 Å. N3- is bonded in a linear geometry to one Zn2+ and one C2+ atom.
Zn(C2N3)2 crystallizes in the orthorhombic Pnma space group. The structure is two-dimensional and consists of four Zn(C2N3)2 sheets oriented in the (0, 0, 1) direction. Zn2+ is bonded in a tetrahedral geometry to four N3- atoms. There are a spread of Zn–N bond distances ranging from 1.96–1.98 Å. There are three inequivalent C4+ sites. In the first C4+ site, C4+ is bonded in a linear geometry to two N3- atoms. There is one shorter (1.18 Å) and one longer (1.29 Å) C–N bond length. In the second C4+ site, C4+ is bonded in a linear geometry to two N3- atoms. There is one shorter (1.17 Å) and one longer (1.29 Å) C–N bond length. In the third C4+ site, C4+ is bonded in a linear geometry to two N3- atoms. There is one shorter (1.18 Å) and one longer (1.28 Å) C–N bond length. There are five inequivalent N3- sites. In the first N3- site, N3- is bonded in a bent 150 degrees geometry to one Zn2+ and one C4+ atom. In the second N3- site, N3- is bonded in a bent 120 degrees geometry to two C4+ atoms. In the third N3- site, N3- is bonded in a bent 120 degrees geometry to two equivalent C4+ atoms. In the fourth N3- site, N3- is bonded in a linear geometry to one Zn2+ and one C4+ atom. In the fifth N3- site, N3- is bonded in a linear geometry to one Zn2+ and one C4+ atom.