KC2 crystallizes in the tetragonal P4/nmm space group. K(1) is bonded in a distorted q4 geometry to five equivalent C(1) and five equivalent C(2) atoms. There are two inequivalent C sites. In the first C site, C(1) is bonded in a 6-coordinate geometry to five equivalent K(1) and one C(2) atom. In the second C site, C(2) is bonded to five equivalent K(1) and one C(1) atom to form a mixture of distorted corner and edge-sharing CK5C octahedra. The corner-sharing octahedral tilt angles are 21°.
KC2 crystallizes in the tetragonal P4/nmm space group. K(1) is bonded in a distorted q4 geometry to five equivalent C(1) and five equivalent C(2) atoms. There is one shorter (3.10 Å) and four longer (3.17 Å) K(1)-C(1) bond lengths. There is one shorter (3.09 Å) and four longer (3.15 Å) K(1)-C(2) bond lengths. There are two inequivalent C sites. In the first C site, C(1) is bonded in a 6-coordinate geometry to five equivalent K(1) and one C(2) atom. The C(1)-C(2) bond length is 1.27 Å. In the second C site, C(2) is bonded to five equivalent K(1) and one C(1) atom to form a mixture of distorted corner and edge-sharing CK5C octahedra. The corner-sharing octahedral tilt angles are 21°.