La4C2Cl5 crystallizes in the triclinic P-1 space group. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 7-coordinate geometry to one C(1), three equivalent Cl(1), and three equivalent Cl(2) atoms. In the second La site, La(2) is bonded in a 8-coordinate geometry to four equivalent C(1), one Cl(1), one Cl(2), and two equivalent Cl(3) atoms. C(1) is bonded in a 6-coordinate geometry to one La(1), four equivalent La(2), and one C(1) atom. There are three inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a distorted rectangular see-saw-like geometry to one La(2) and three equivalent La(1) atoms. In the second Cl site, Cl(2) is bonded in a distorted rectangular see-saw-like geometry to one La(2) and three equivalent La(1) atoms. In the third Cl site, Cl(3) is bonded in a square co-planar geometry to four equivalent La(2) atoms.
La4C2Cl5 crystallizes in the triclinic P-1 space group. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 7-coordinate geometry to one C(1), three equivalent Cl(1), and three equivalent Cl(2) atoms. The La(1)-C(1) bond length is 2.30 Å. There are two shorter (2.96 Å) and one longer (3.30 Å) La(1)-Cl(1) bond length. There are two shorter (2.95 Å) and one longer (3.32 Å) La(1)-Cl(2) bond length. In the second La site, La(2) is bonded in a 8-coordinate geometry to four equivalent C(1), one Cl(1), one Cl(2), and two equivalent Cl(3) atoms. All La(2)-C(1) bond lengths are 2.70 Å. The La(2)-Cl(1) bond length is 2.97 Å. The La(2)-Cl(2) bond length is 2.96 Å. Both La(2)-Cl(3) bond lengths are 3.03 Å. C(1) is bonded in a 6-coordinate geometry to one La(1), four equivalent La(2), and one C(1) atom. The C(1)-C(1) bond length is 1.42 Å. There are three inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a distorted rectangular see-saw-like geometry to one La(2) and three equivalent La(1) atoms. In the second Cl site, Cl(2) is bonded in a distorted rectangular see-saw-like geometry to one La(2) and three equivalent La(1) atoms. In the third Cl site, Cl(3) is bonded in a square co-planar geometry to four equivalent La(2) atoms.