K2PtI5 crystallizes in the orthorhombic Cmcm space group. K(1) is bonded in a 7-coordinate geometry to one I(3), two equivalent I(1), and four equivalent I(2) atoms. Pt(1) is bonded to two equivalent I(1), two equivalent I(2), and two equivalent I(3) atoms to form corner-sharing PtI6 octahedra. The corner-sharing octahedral tilt angles are 12°. There are three inequivalent I sites. In the first I site, I(1) is bonded in a distorted T-shaped geometry to two equivalent K(1) and one Pt(1) atom. In the second I site, I(2) is bonded to four equivalent K(1) and one Pt(1) atom to form a mixture of distorted corner and edge-sharing IK4Pt trigonal bipyramids. In the third I site, I(3) is bonded in a rectangular see-saw-like geometry to two equivalent K(1) and two equivalent Pt(1) atoms.
K2PtI5 crystallizes in the orthorhombic Cmcm space group. K(1) is bonded in a 7-coordinate geometry to one I(3), two equivalent I(1), and four equivalent I(2) atoms. The K(1)-I(3) bond length is 3.75 Å. Both K(1)-I(1) bond lengths are 3.63 Å. There are two shorter (3.79 Å) and two longer (3.82 Å) K(1)-I(2) bond lengths. Pt(1) is bonded to two equivalent I(1), two equivalent I(2), and two equivalent I(3) atoms to form corner-sharing PtI6 octahedra. The corner-sharing octahedral tilt angles are 12°. Both Pt(1)-I(1) bond lengths are 2.71 Å. Both Pt(1)-I(2) bond lengths are 2.69 Å. Both Pt(1)-I(3) bond lengths are 2.90 Å. There are three inequivalent I sites. In the first I site, I(1) is bonded in a distorted T-shaped geometry to two equivalent K(1) and one Pt(1) atom. In the second I site, I(2) is bonded to four equivalent K(1) and one Pt(1) atom to form a mixture of distorted corner and edge-sharing IK4Pt trigonal bipyramids. In the third I site, I(3) is bonded in a rectangular see-saw-like geometry to two equivalent K(1) and two equivalent Pt(1) atoms.