K2PtC2O5Cl2 crystallizes in the triclinic P-1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent Cl(1), and two equivalent Cl(2) atoms. In the second K site, K(2) is bonded in a 8-coordinate geometry to two equivalent O(3), two equivalent O(4), two equivalent O(5), one Cl(1), and one Cl(2) atom. Pt(1) is bonded in a square co-planar geometry to one O(1), one O(2), one Cl(1), and one Cl(2) atom. There are two inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one O(1) and one O(3) atom. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one O(2) and one O(4) atom. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent K(1), one Pt(1), and one C(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent K(1), one Pt(1), and one C(2) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to two equivalent K(2) and one C(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to two equivalent K(2) and one C(2) atom. In the fifth O site, O(5) is bonded in a 1-coordinate geometry to two equivalent K(2) and one O(5) atom. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a 4-coordinate geometry to one K(2), two equivalent K(1), and one Pt(1) atom. In the second Cl site, Cl(2) is bonded in a 4-coordinate geometry to one K(2), two equivalent K(1), and one Pt(1) atom.
K2PtC2O5Cl2 crystallizes in the triclinic P-1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent Cl(1), and two equivalent Cl(2) atoms. There is one shorter (2.88 Å) and one longer (3.02 Å) K(1)-O(1) bond length. There is one shorter (3.01 Å) and one longer (3.03 Å) K(1)-O(2) bond length. There is one shorter (3.27 Å) and one longer (3.30 Å) K(1)-Cl(1) bond length. There is one shorter (3.15 Å) and one longer (3.29 Å) K(1)-Cl(2) bond length. In the second K site, K(2) is bonded in a 8-coordinate geometry to two equivalent O(3), two equivalent O(4), two equivalent O(5), one Cl(1), and one Cl(2) atom. There is one shorter (2.76 Å) and one longer (2.81 Å) K(2)-O(3) bond length. There is one shorter (2.76 Å) and one longer (2.83 Å) K(2)-O(4) bond length. There is one shorter (3.25 Å) and one longer (3.34 Å) K(2)-O(5) bond length. The K(2)-Cl(1) bond length is 3.32 Å. The K(2)-Cl(2) bond length is 3.59 Å. Pt(1) is bonded in a square co-planar geometry to one O(1), one O(2), one Cl(1), and one Cl(2) atom. The Pt(1)-O(1) bond length is 2.06 Å. The Pt(1)-O(2) bond length is 2.05 Å. The Pt(1)-Cl(1) bond length is 2.31 Å. The Pt(1)-Cl(2) bond length is 2.29 Å. There are two inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one O(1) and one O(3) atom. The C(1)-O(1) bond length is 1.31 Å. The C(1)-O(3) bond length is 1.24 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one O(2) and one O(4) atom. The C(2)-O(2) bond length is 1.31 Å. The C(2)-O(4) bond length is 1.24 Å. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent K(1), one Pt(1), and one C(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent K(1), one Pt(1), and one C(2) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to two equivalent K(2) and one C(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to two equivalent K(2) and one C(2) atom. In the fifth O site, O(5) is bonded in a 1-coordinate geometry to two equivalent K(2) and one O(5) atom. The O(5)-O(5) bond length is 1.24 Å. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a 4-coordinate geometry to one K(2), two equivalent K(1), and one Pt(1) atom. In the second Cl site, Cl(2) is bonded in a 4-coordinate geometry to one K(2), two equivalent K(1), and one Pt(1) atom.