K2Ni(CN)4 crystallizes in the monoclinic P2_1/c space group. K(1) is bonded in a 6-coordinate geometry to three equivalent N(1) and three equivalent N(2) atoms. Ni(1) is bonded in a square co-planar geometry to two equivalent C(1) and two equivalent C(2) atoms. There are two inequivalent C sites. In the first C site, C(1) is bonded in a linear geometry to one Ni(1) and one N(2) atom. In the second C site, C(2) is bonded in a linear geometry to one Ni(1) and one N(1) atom. There are two inequivalent N sites. In the first N site, N(1) is bonded in a 4-coordinate geometry to three equivalent K(1) and one C(2) atom. In the second N site, N(2) is bonded in a 4-coordinate geometry to three equivalent K(1) and one C(1) atom.
K2Ni(CN)4 crystallizes in the monoclinic P2_1/c space group. K(1) is bonded in a 6-coordinate geometry to three equivalent N(1) and three equivalent N(2) atoms. There are a spread of K(1)-N(1) bond distances ranging from 2.82-3.25 Å. There are two shorter (2.90 Å) and one longer (3.08 Å) K(1)-N(2) bond length. Ni(1) is bonded in a square co-planar geometry to two equivalent C(1) and two equivalent C(2) atoms. Both Ni(1)-C(1) bond lengths are 1.84 Å. Both Ni(1)-C(2) bond lengths are 1.84 Å. There are two inequivalent C sites. In the first C site, C(1) is bonded in a linear geometry to one Ni(1) and one N(2) atom. The C(1)-N(2) bond length is 1.18 Å. In the second C site, C(2) is bonded in a linear geometry to one Ni(1) and one N(1) atom. The C(2)-N(1) bond length is 1.18 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a 4-coordinate geometry to three equivalent K(1) and one C(2) atom. In the second N site, N(2) is bonded in a 4-coordinate geometry to three equivalent K(1) and one C(1) atom.