Tb2Re2Si2C crystallizes in the monoclinic C2/m space group. Tb(1) is bonded in a 2-coordinate geometry to five equivalent Si(1) and two equivalent C(1) atoms. Re(1) is bonded in a single-bond geometry to three equivalent Si(1) and one C(1) atom. Si(1) is bonded in a 9-coordinate geometry to five equivalent Tb(1), three equivalent Re(1), and one Si(1) atom. C(1) is bonded to four equivalent Tb(1) and two equivalent Re(1) atoms to form edge-sharing CTb4Re2 octahedra.
Tb2Re2Si2C crystallizes in the monoclinic C2/m space group. Tb(1) is bonded in a 2-coordinate geometry to five equivalent Si(1) and two equivalent C(1) atoms. There are a spread of Tb(1)-Si(1) bond distances ranging from 3.04-3.15 Å. Both Tb(1)-C(1) bond lengths are 2.65 Å. Re(1) is bonded in a single-bond geometry to three equivalent Si(1) and one C(1) atom. There are two shorter (2.46 Å) and one longer (2.48 Å) Re(1)-Si(1) bond length. The Re(1)-C(1) bond length is 1.95 Å. Si(1) is bonded in a 9-coordinate geometry to five equivalent Tb(1), three equivalent Re(1), and one Si(1) atom. The Si(1)-Si(1) bond length is 2.57 Å. C(1) is bonded to four equivalent Tb(1) and two equivalent Re(1) atoms to form edge-sharing CTb4Re2 octahedra.