TbRe2SiC crystallizes in the orthorhombic Cmcm space group. Tb(1) is bonded in a 4-coordinate geometry to three equivalent Si(1) and four 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 three equivalent Tb(1) and six equivalent Re(1) atoms. C(1) is bonded to four equivalent Tb(1) and two equivalent Re(1) atoms to form a mixture of corner and edge-sharing CTb4Re2 octahedra. The corner-sharing octahedral tilt angles are 20°.
TbRe2SiC crystallizes in the orthorhombic Cmcm space group. Tb(1) is bonded in a 4-coordinate geometry to three equivalent Si(1) and four equivalent C(1) atoms. There is one shorter (3.02 Å) and two longer (3.13 Å) Tb(1)-Si(1) bond lengths. All Tb(1)-C(1) bond lengths are 2.74 Å. Re(1) is bonded in a single-bond geometry to three equivalent Si(1) and one C(1) atom. There is one shorter (2.48 Å) and two longer (2.50 Å) Re(1)-Si(1) bond lengths. The Re(1)-C(1) bond length is 1.95 Å. Si(1) is bonded in a 9-coordinate geometry to three equivalent Tb(1) and six equivalent Re(1) atoms. C(1) is bonded to four equivalent Tb(1) and two equivalent Re(1) atoms to form a mixture of corner and edge-sharing CTb4Re2 octahedra. The corner-sharing octahedral tilt angles are 20°.