Ho2ReC2 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Ho sites. In the first Ho site, Ho(1) is bonded in a distorted rectangular see-saw-like geometry to two equivalent C(1) and two equivalent C(2) atoms. In the second Ho site, Ho(2) is bonded to two equivalent C(2) and three equivalent C(1) atoms to form a mixture of edge and corner-sharing HoC5 square pyramids. Re(1) is bonded in a distorted trigonal planar geometry to one C(1) and two equivalent C(2) atoms. There are two inequivalent C sites. In the first C site, C(1) is bonded to two equivalent Ho(1), three equivalent Ho(2), and one Re(1) atom to form CHo5Re octahedra that share corners with two equivalent C(2)Ho4Re2 octahedra, corners with four equivalent C(1)Ho5Re octahedra, edges with two equivalent C(1)Ho5Re octahedra, and edges with five equivalent C(2)Ho4Re2 octahedra. The corner-sharing octahedral tilt angles range from 3-38°. In the second C site, C(2) is bonded to two equivalent Ho(1), two equivalent Ho(2), and two equivalent Re(1) atoms to form CHo4Re2 octahedra that share corners with two equivalent C(2)Ho4Re2 octahedra, corners with two equivalent C(1)Ho5Re octahedra, edges with two equivalent C(2)Ho4Re2 octahedra, and edges with five equivalent C(1)Ho5Re octahedra. The corner-sharing octahedral tilt angles range from 12-38°.
Ho2ReC2 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Ho sites. In the first Ho site, Ho(1) is bonded in a distorted rectangular see-saw-like geometry to two equivalent C(1) and two equivalent C(2) atoms. There is one shorter (2.49 Å) and one longer (2.69 Å) Ho(1)-C(1) bond length. Both Ho(1)-C(2) bond lengths are 2.55 Å. In the second Ho site, Ho(2) is bonded to two equivalent C(2) and three equivalent C(1) atoms to form a mixture of edge and corner-sharing HoC5 square pyramids. There is one shorter (2.47 Å) and one longer (2.54 Å) Ho(2)-C(2) bond length. There are two shorter (2.54 Å) and one longer (2.55 Å) Ho(2)-C(1) bond length. Re(1) is bonded in a distorted trigonal planar geometry to one C(1) and two equivalent C(2) atoms. The Re(1)-C(1) bond length is 1.92 Å. There is one shorter (1.96 Å) and one longer (2.04 Å) Re(1)-C(2) bond length. There are two inequivalent C sites. In the first C site, C(1) is bonded to two equivalent Ho(1), three equivalent Ho(2), and one Re(1) atom to form CHo5Re octahedra that share corners with two equivalent C(2)Ho4Re2 octahedra, corners with four equivalent C(1)Ho5Re octahedra, edges with two equivalent C(1)Ho5Re octahedra, and edges with five equivalent C(2)Ho4Re2 octahedra. The corner-sharing octahedral tilt angles range from 3-38°. In the second C site, C(2) is bonded to two equivalent Ho(1), two equivalent Ho(2), and two equivalent Re(1) atoms to form CHo4Re2 octahedra that share corners with two equivalent C(2)Ho4Re2 octahedra, corners with two equivalent C(1)Ho5Re octahedra, edges with two equivalent C(2)Ho4Re2 octahedra, and edges with five equivalent C(1)Ho5Re octahedra. The corner-sharing octahedral tilt angles range from 12-38°.