Dy2ReC2 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded to two equivalent C(1) and three equivalent C(2) atoms to form a mixture of corner and edge-sharing DyC5 square pyramids. In the second Dy site, Dy(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent C(1) and two equivalent C(2) atoms. Re(1) is bonded in a distorted 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 Dy(1), two equivalent Dy(2), and two equivalent Re(1) atoms to form CDy4Re2 octahedra that share corners with two equivalent C(1)Dy4Re2 octahedra, corners with two equivalent C(2)Dy5Re octahedra, edges with two equivalent C(1)Dy4Re2 octahedra, and edges with five equivalent C(2)Dy5Re octahedra. The corner-sharing octahedral tilt angles range from 11-39°. In the second C site, C(2) is bonded to two equivalent Dy(2), three equivalent Dy(1), and one Re(1) atom to form CDy5Re octahedra that share corners with two equivalent C(1)Dy4Re2 octahedra, corners with four equivalent C(2)Dy5Re octahedra, edges with two equivalent C(2)Dy5Re octahedra, and edges with five equivalent C(1)Dy4Re2 octahedra. The corner-sharing octahedral tilt angles range from 3-39°.
Dy2ReC2 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded to two equivalent C(1) and three equivalent C(2) atoms to form a mixture of corner and edge-sharing DyC5 square pyramids. There is one shorter (2.50 Å) and one longer (2.57 Å) Dy(1)-C(1) bond length. All Dy(1)-C(2) bond lengths are 2.57 Å. In the second Dy site, Dy(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent C(1) and two equivalent C(2) atoms. Both Dy(2)-C(1) bond lengths are 2.58 Å. There is one shorter (2.53 Å) and one longer (2.67 Å) Dy(2)-C(2) bond length. Re(1) is bonded in a distorted trigonal planar geometry to one C(2) and two equivalent C(1) atoms. The Re(1)-C(2) bond length is 1.93 Å. There is one shorter (1.97 Å) and one longer (2.04 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 Dy(1), two equivalent Dy(2), and two equivalent Re(1) atoms to form CDy4Re2 octahedra that share corners with two equivalent C(1)Dy4Re2 octahedra, corners with two equivalent C(2)Dy5Re octahedra, edges with two equivalent C(1)Dy4Re2 octahedra, and edges with five equivalent C(2)Dy5Re octahedra. The corner-sharing octahedral tilt angles range from 11-39°. In the second C site, C(2) is bonded to two equivalent Dy(2), three equivalent Dy(1), and one Re(1) atom to form CDy5Re octahedra that share corners with two equivalent C(1)Dy4Re2 octahedra, corners with four equivalent C(2)Dy5Re octahedra, edges with two equivalent C(2)Dy5Re octahedra, and edges with five equivalent C(1)Dy4Re2 octahedra. The corner-sharing octahedral tilt angles range from 3-39°.