K2PtO2I5 crystallizes in the orthorhombic Cmc2_1 space group. K(1) is bonded in a distorted bent 120 degrees geometry to two equivalent O(1), one I(2), and one I(4) atom. Pt(1) is bonded to one I(2), one I(3), two equivalent I(1), and two equivalent I(4) atoms to form corner-sharing PtI6 octahedra. The corner-sharing octahedral tilt angles are 4°. O(1) is bonded in a trigonal non-coplanar geometry to two equivalent K(1) and one I(1) atom. There are four inequivalent I sites. In the first I site, I(1) is bonded in a 1-coordinate geometry to one Pt(1) and one O(1) atom. In the second I site, I(2) is bonded in a 3-coordinate geometry to two equivalent K(1) and one Pt(1) atom. In the third I site, I(3) is bonded in a distorted single-bond geometry to one Pt(1) atom. In the fourth I site, I(4) is bonded in a rectangular see-saw-like geometry to two equivalent K(1) and two equivalent Pt(1) atoms.
K2PtO2I5 crystallizes in the orthorhombic Cmc2_1 space group. K(1) is bonded in a distorted bent 120 degrees geometry to two equivalent O(1), one I(2), and one I(4) atom. There is one shorter (2.68 Å) and one longer (2.70 Å) K(1)-O(1) bond length. The K(1)-I(2) bond length is 3.70 Å. The K(1)-I(4) bond length is 3.76 Å. Pt(1) is bonded to one I(2), one I(3), two equivalent I(1), and two equivalent I(4) atoms to form corner-sharing PtI6 octahedra. The corner-sharing octahedral tilt angles are 4°. The Pt(1)-I(2) bond length is 2.70 Å. The Pt(1)-I(3) bond length is 2.69 Å. Both Pt(1)-I(1) bond lengths are 2.67 Å. Both Pt(1)-I(4) bond lengths are 2.92 Å. O(1) is bonded in a trigonal non-coplanar geometry to two equivalent K(1) and one I(1) atom. The O(1)-I(1) bond length is 1.90 Å. There are four inequivalent I sites. In the first I site, I(1) is bonded in a 1-coordinate geometry to one Pt(1) and one O(1) atom. In the second I site, I(2) is bonded in a 3-coordinate geometry to two equivalent K(1) and one Pt(1) atom. In the third I site, I(3) is bonded in a distorted single-bond geometry to one Pt(1) atom. In the fourth I site, I(4) is bonded in a rectangular see-saw-like geometry to two equivalent K(1) and two equivalent Pt(1) atoms.