IrC4 crystallizes in the trigonal P3_121 space group. Ir(1) is bonded in a 8-coordinate geometry to two equivalent C(1), two equivalent C(2), and four equivalent C(3) atoms. There are three inequivalent C sites. In the first C site, C(3) is bonded to two equivalent Ir(1), one C(1), and one C(2) atom to form a mixture of corner and edge-sharing CIr2C2 tetrahedra. In the second C site, C(1) is bonded to two equivalent Ir(1) and two equivalent C(3) atoms to form a mixture of distorted corner and edge-sharing CIr2C2 tetrahedra. In the third C site, C(2) is bonded to two equivalent Ir(1) and two equivalent C(3) atoms to form a mixture of corner and edge-sharing CIr2C2 tetrahedra.
IrC4 crystallizes in the trigonal P3_121 space group. Ir(1) is bonded in a 8-coordinate geometry to two equivalent C(1), two equivalent C(2), and four equivalent C(3) atoms. Both Ir(1)-C(1) bond lengths are 2.27 Å. Both Ir(1)-C(2) bond lengths are 2.11 Å. There are two shorter (2.21 Å) and two longer (2.22 Å) Ir(1)-C(3) bond lengths. There are three inequivalent C sites. In the first C site, C(3) is bonded to two equivalent Ir(1), one C(1), and one C(2) atom to form a mixture of corner and edge-sharing CIr2C2 tetrahedra. The C(3)-C(1) bond length is 1.50 Å. The C(3)-C(2) bond length is 1.51 Å. In the second C site, C(1) is bonded to two equivalent Ir(1) and two equivalent C(3) atoms to form a mixture of distorted corner and edge-sharing CIr2C2 tetrahedra. In the third C site, C(2) is bonded to two equivalent Ir(1) and two equivalent C(3) atoms to form a mixture of corner and edge-sharing CIr2C2 tetrahedra.