Yb2ReC2 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Yb sites. In the first Yb site, Yb(1) is bonded to two equivalent C(1) and three equivalent C(2) atoms to form a mixture of distorted corner and edge-sharing YbC5 square pyramids. In the second Yb site, Yb(2) is bonded in a distorted square co-planar geometry to two equivalent C(1) and two equivalent C(2) atoms. Re(1) is bonded in a trigonal planar geometry to one C(2) and two equivalent C(1) atoms. There are two inequivalent C sites. In the first C site, C(1) is bonded to two equivalent Yb(1), two equivalent Yb(2), and two equivalent Re(1) atoms to form CYb4Re2 octahedra that share corners with two equivalent C(1)Yb4Re2 octahedra, corners with two equivalent C(2)Yb5Re octahedra, edges with two equivalent C(1)Yb4Re2 octahedra, and edges with five equivalent C(2)Yb5Re octahedra. The corner-sharing octahedral tilt angles range from 6-51°. In the second C site, C(2) is bonded to two equivalent Yb(2), three equivalent Yb(1), and one Re(1) atom to form distorted CYb5Re octahedra that share corners with two equivalent C(1)Yb4Re2 octahedra, corners with four equivalent C(2)Yb5Re octahedra, edges with two equivalent C(2)Yb5Re octahedra, and edges with five equivalent C(1)Yb4Re2 octahedra. The corner-sharing octahedral tilt angles range from 7-51°.
Yb2ReC2 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Yb sites. In the first Yb site, Yb(1) is bonded to two equivalent C(1) and three equivalent C(2) atoms to form a mixture of distorted corner and edge-sharing YbC5 square pyramids. There is one shorter (2.63 Å) and one longer (2.66 Å) Yb(1)-C(1) bond length. There are two shorter (2.56 Å) and one longer (2.73 Å) Yb(1)-C(2) bond length. In the second Yb site, Yb(2) is bonded in a distorted square co-planar geometry to two equivalent C(1) and two equivalent C(2) atoms. Both Yb(2)-C(1) bond lengths are 2.56 Å. There is one shorter (2.58 Å) and one longer (2.90 Å) Yb(2)-C(2) bond length. Re(1) is bonded in a trigonal planar geometry to one C(2) and two equivalent C(1) atoms. The Re(1)-C(2) bond length is 1.85 Å. There is one shorter (1.93 Å) and one longer (1.98 Å) Re(1)-C(1) bond length. There are two inequivalent C sites. In the first C site, C(1) is bonded to two equivalent Yb(1), two equivalent Yb(2), and two equivalent Re(1) atoms to form CYb4Re2 octahedra that share corners with two equivalent C(1)Yb4Re2 octahedra, corners with two equivalent C(2)Yb5Re octahedra, edges with two equivalent C(1)Yb4Re2 octahedra, and edges with five equivalent C(2)Yb5Re octahedra. The corner-sharing octahedral tilt angles range from 6-51°. In the second C site, C(2) is bonded to two equivalent Yb(2), three equivalent Yb(1), and one Re(1) atom to form distorted CYb5Re octahedra that share corners with two equivalent C(1)Yb4Re2 octahedra, corners with four equivalent C(2)Yb5Re octahedra, edges with two equivalent C(2)Yb5Re octahedra, and edges with five equivalent C(1)Yb4Re2 octahedra. The corner-sharing octahedral tilt angles range from 7-51°.