Y2ReC2 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Y sites. In the first Y site, Y(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 Y site, Y(2) is bonded to two equivalent C(2) and three equivalent C(1) atoms to form a mixture of corner and edge-sharing YC5 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 Y(1), three equivalent Y(2), and one Re(1) atom to form CY5Re octahedra that share corners with two equivalent C(2)Y4Re2 octahedra, corners with four equivalent C(1)Y5Re octahedra, edges with two equivalent C(1)Y5Re octahedra, and edges with five equivalent C(2)Y4Re2 octahedra. The corner-sharing octahedral tilt angles range from 4-40°. In the second C site, C(2) is bonded to two equivalent Y(1), two equivalent Y(2), and two equivalent Re(1) atoms to form CY4Re2 octahedra that share corners with two equivalent C(2)Y4Re2 octahedra, corners with two equivalent C(1)Y5Re octahedra, edges with two equivalent C(2)Y4Re2 octahedra, and edges with five equivalent C(1)Y5Re octahedra. The corner-sharing octahedral tilt angles range from 12-40°.
Y2ReC2 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Y sites. In the first Y site, Y(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 (2.52 Å) and one longer (2.74 Å) Y(1)-C(1) bond length. Both Y(1)-C(2) bond lengths are 2.57 Å. In the second Y site, Y(2) is bonded to two equivalent C(2) and three equivalent C(1) atoms to form a mixture of corner and edge-sharing YC5 square pyramids. There is one shorter (2.49 Å) and one longer (2.56 Å) Y(2)-C(2) bond length. There are two shorter (2.56 Å) and one longer (2.57 Å) Y(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 (2.05 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 Y(1), three equivalent Y(2), and one Re(1) atom to form CY5Re octahedra that share corners with two equivalent C(2)Y4Re2 octahedra, corners with four equivalent C(1)Y5Re octahedra, edges with two equivalent C(1)Y5Re octahedra, and edges with five equivalent C(2)Y4Re2 octahedra. The corner-sharing octahedral tilt angles range from 4-40°. In the second C site, C(2) is bonded to two equivalent Y(1), two equivalent Y(2), and two equivalent Re(1) atoms to form CY4Re2 octahedra that share corners with two equivalent C(2)Y4Re2 octahedra, corners with two equivalent C(1)Y5Re octahedra, edges with two equivalent C(2)Y4Re2 octahedra, and edges with five equivalent C(1)Y5Re octahedra. The corner-sharing octahedral tilt angles range from 12-40°.