K2OsNCl5 crystallizes in the orthorhombic Cmc2_1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 5-coordinate geometry to one Cl(1), two equivalent Cl(2), and two equivalent Cl(3) atoms. In the second K site, K(2) is bonded in a 7-coordinate geometry to two equivalent N(1), one Cl(1), and four equivalent Cl(2) atoms. Os(1) is bonded in a distorted octahedral geometry to one N(1), one Cl(1), two equivalent Cl(2), and two equivalent Cl(3) atoms. N(1) is bonded in a distorted single-bond geometry to two equivalent K(2) and one Os(1) atom. There are three inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a T-shaped geometry to one K(1), one K(2), and one Os(1) atom. In the second Cl site, Cl(2) is bonded in a rectangular see-saw-like geometry to one K(1), two equivalent K(2), and one Os(1) atom. In the third Cl site, Cl(3) is bonded in a distorted L-shaped geometry to one K(1) and one Os(1) atom.
K2OsNCl5 crystallizes in the orthorhombic Cmc2_1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 5-coordinate geometry to one Cl(1), two equivalent Cl(2), and two equivalent Cl(3) atoms. The K(1)-Cl(1) bond length is 3.07 Å. Both K(1)-Cl(2) bond lengths are 3.40 Å. Both K(1)-Cl(3) bond lengths are 3.28 Å. In the second K site, K(2) is bonded in a 7-coordinate geometry to two equivalent N(1), one Cl(1), and four equivalent Cl(2) atoms. There is one shorter (3.05 Å) and one longer (3.42 Å) K(2)-N(1) bond length. The K(2)-Cl(1) bond length is 3.01 Å. There are two shorter (3.20 Å) and two longer (3.34 Å) K(2)-Cl(2) bond lengths. Os(1) is bonded in a distorted octahedral geometry to one N(1), one Cl(1), two equivalent Cl(2), and two equivalent Cl(3) atoms. The Os(1)-N(1) bond length is 1.67 Å. The Os(1)-Cl(1) bond length is 2.57 Å. Both Os(1)-Cl(2) bond lengths are 2.44 Å. Both Os(1)-Cl(3) bond lengths are 2.34 Å. N(1) is bonded in a distorted single-bond geometry to two equivalent K(2) and one Os(1) atom. There are three inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a T-shaped geometry to one K(1), one K(2), and one Os(1) atom. In the second Cl site, Cl(2) is bonded in a rectangular see-saw-like geometry to one K(1), two equivalent K(2), and one Os(1) atom. In the third Cl site, Cl(3) is bonded in a distorted L-shaped geometry to one K(1) and one Os(1) atom.