La5C2Cl9 crystallizes in the triclinic P-1 space group. There are five inequivalent La sites. In the first La site, La(1) is bonded in a 9-coordinate geometry to one C(1), one C(2), one Cl(1), one Cl(10), one Cl(4), one Cl(5), one Cl(6), one Cl(8), and one Cl(9) atom. In the second La site, La(2) is bonded in a 8-coordinate geometry to one C(2), one Cl(10), one Cl(4), one Cl(8), two equivalent Cl(3), and two equivalent Cl(6) atoms. In the third La site, La(3) is bonded in a 9-coordinate geometry to one C(1), one C(2), one Cl(1), one Cl(3), one Cl(4), one Cl(5), one Cl(7), one Cl(8), and one Cl(9) atom. In the fourth La site, La(4) is bonded in a 8-coordinate geometry to one C(1), one Cl(5), one Cl(7), one Cl(8), two equivalent Cl(2), and two equivalent Cl(9) atoms. In the fifth La site, La(5) is bonded in a 8-coordinate geometry to one C(1), one C(2), one Cl(1), one Cl(2), one Cl(4), one Cl(5), one Cl(6), and one Cl(8) atom. There are two inequivalent C sites. In the first C site, C(1) is bonded in a 5-coordinate geometry to one La(1), one La(3), one La(4), one La(5), and one C(2) atom. In the second C site, C(2) is bonded in a 5-coordinate geometry to one La(1), one La(2), one La(3), one La(5), and one C(1) atom. There are ten inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a trigonal planar geometry to one La(1), one La(3), and one La(5) atom. In the second Cl site, Cl(2) is bonded in a distorted trigonal non-coplanar geometry to one La(5) and two equivalent La(4) atoms. In the third Cl site, Cl(3) is bonded in a trigonal non-coplanar geometry to one La(3) and two equivalent La(2) atoms. In the fourth Cl site, Cl(4) is bonded in a distorted see-saw-like geometry to one La(1), one La(2), one La(3), and one La(5) atom. In the fifth Cl site, Cl(5) is bonded in a distorted see-saw-like geometry to one La(1), one La(3), one La(4), and one La(5) atom. In the sixth Cl site, Cl(6) is bonded in a distorted see-saw-like geometry to one La(1), one La(5), and two equivalent La(2) atoms. In the seventh Cl site, Cl(7) is bonded in a distorted square co-planar geometry to two equivalent La(3) and two equivalent La(4) atoms. In the eighth Cl site, Cl(8) is bonded in a distorted trigonal bipyramidal geometry to one La(1), one La(2), one La(3), one La(4), and one La(5) atom. In the ninth Cl site, Cl(9) is bonded in a distorted see-saw-like geometry to one La(1), one La(3), and two equivalent La(4) atoms. In the tenth Cl site, Cl(10) is bonded in a 4-coordinate geometry to two equivalent La(1) and two equivalent La(2) atoms.
La5C2Cl9 crystallizes in the triclinic P-1 space group. There are five inequivalent La sites. In the first La site, La(1) is bonded in a 9-coordinate geometry to one C(1), one C(2), one Cl(1), one Cl(10), one Cl(4), one Cl(5), one Cl(6), one Cl(8), and one Cl(9) atom. The La(1)-C(1) bond length is 2.49 Å. The La(1)-C(2) bond length is 2.46 Å. The La(1)-Cl(1) bond length is 2.94 Å. The La(1)-Cl(10) bond length is 3.36 Å. The La(1)-Cl(4) bond length is 3.14 Å. The La(1)-Cl(5) bond length is 3.04 Å. The La(1)-Cl(6) bond length is 3.19 Å. The La(1)-Cl(8) bond length is 3.35 Å. The La(1)-Cl(9) bond length is 2.98 Å. In the second La site, La(2) is bonded in a 8-coordinate geometry to one C(2), one Cl(10), one Cl(4), one Cl(8), two equivalent Cl(3), and two equivalent Cl(6) atoms. The La(2)-C(2) bond length is 2.36 Å. The La(2)-Cl(10) bond length is 2.90 Å. The La(2)-Cl(4) bond length is 3.40 Å. The La(2)-Cl(8) bond length is 3.10 Å. There is one shorter (2.89 Å) and one longer (2.90 Å) La(2)-Cl(3) bond length. There is one shorter (2.99 Å) and one longer (3.13 Å) La(2)-Cl(6) bond length. In the third La site, La(3) is bonded in a 9-coordinate geometry to one C(1), one C(2), one Cl(1), one Cl(3), one Cl(4), one Cl(5), one Cl(7), one Cl(8), and one Cl(9) atom. The La(3)-C(1) bond length is 2.47 Å. The La(3)-C(2) bond length is 2.51 Å. The La(3)-Cl(1) bond length is 3.04 Å. The La(3)-Cl(3) bond length is 2.87 Å. The La(3)-Cl(4) bond length is 3.02 Å. The La(3)-Cl(5) bond length is 3.01 Å. The La(3)-Cl(7) bond length is 3.17 Å. The La(3)-Cl(8) bond length is 3.50 Å. The La(3)-Cl(9) bond length is 3.39 Å. In the fourth La site, La(4) is bonded in a 8-coordinate geometry to one C(1), one Cl(5), one Cl(7), one Cl(8), two equivalent Cl(2), and two equivalent Cl(9) atoms. The La(4)-C(1) bond length is 2.35 Å. The La(4)-Cl(5) bond length is 3.10 Å. The La(4)-Cl(7) bond length is 3.02 Å. The La(4)-Cl(8) bond length is 3.63 Å. There is one shorter (2.86 Å) and one longer (2.95 Å) La(4)-Cl(2) bond length. There is one shorter (2.90 Å) and one longer (3.00 Å) La(4)-Cl(9) bond length. In the fifth La site, La(5) is bonded in a 8-coordinate geometry to one C(1), one C(2), one Cl(1), one Cl(2), one Cl(4), one Cl(5), one Cl(6), and one Cl(8) atom. The La(5)-C(1) bond length is 2.49 Å. The La(5)-C(2) bond length is 2.48 Å. The La(5)-Cl(1) bond length is 2.96 Å. The La(5)-Cl(2) bond length is 2.87 Å. The La(5)-Cl(4) bond length is 3.18 Å. The La(5)-Cl(5) bond length is 3.27 Å. The La(5)-Cl(6) bond length is 2.96 Å. The La(5)-Cl(8) bond length is 2.99 Å. There are two inequivalent C sites. In the first C site, C(1) is bonded in a 5-coordinate geometry to one La(1), one La(3), one La(4), one La(5), and one C(2) atom. The C(1)-C(2) bond length is 1.47 Å. In the second C site, C(2) is bonded in a 5-coordinate geometry to one La(1), one La(2), one La(3), one La(5), and one C(1) atom. There are ten inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a trigonal planar geometry to one La(1), one La(3), and one La(5) atom. In the second Cl site, Cl(2) is bonded in a distorted trigonal non-coplanar geometry to one La(5) and two equivalent La(4) atoms. In the third Cl site, Cl(3) is bonded in a trigonal non-coplanar geometry to one La(3) and two equivalent La(2) atoms. In the fourth Cl site, Cl(4) is bonded in a distorted see-saw-like geometry to one La(1), one La(2), one La(3), and one La(5) atom. In the fifth Cl site, Cl(5) is bonded in a distorted see-saw-like geometry to one La(1), one La(3), one La(4), and one La(5) atom. In the sixth Cl site, Cl(6) is bonded in a distorted see-saw-like geometry to one La(1), one La(5), and two equivalent La(2) atoms. In the seventh Cl site, Cl(7) is bonded in a distorted square co-planar geometry to two equivalent La(3) and two equivalent La(4) atoms. In the eighth Cl site, Cl(8) is bonded in a distorted trigonal bipyramidal geometry to one La(1), one La(2), one La(3), one La(4), and one La(5) atom. In the ninth Cl site, Cl(9) is bonded in a distorted see-saw-like geometry to one La(1), one La(3), and two equivalent La(4) atoms. In the tenth Cl site, Cl(10) is bonded in a 4-coordinate geometry to two equivalent La(1) and two equivalent La(2) atoms.