Ce5C2Cl9 crystallizes in the triclinic P-1 space group. There are five inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 8-coordinate geometry to one C(2), one Cl(1), one Cl(10), one Cl(2), one Cl(7), one Cl(8), and two equivalent Cl(4) atoms. In the second Ce site, Ce(2) is bonded in a 7-coordinate geometry to one C(1), one C(2), one Cl(1), one Cl(5), one Cl(6), one Cl(7), and one Cl(9) atom. In the third Ce site, Ce(3) is bonded in a 8-coordinate geometry to one C(1), one C(2), one Cl(1), one Cl(10), one Cl(4), one Cl(5), one Cl(6), and one Cl(7) atom. In the fourth Ce site, Ce(4) is bonded in a 8-coordinate geometry to one C(1), one C(2), one Cl(1), one Cl(10), one Cl(2), one Cl(3), one Cl(6), and one Cl(8) atom. In the fifth Ce site, Ce(5) is bonded in a 7-coordinate geometry to one C(1), one Cl(1), one Cl(3), one Cl(7), one Cl(9), and two equivalent Cl(5) atoms. There are two inequivalent C sites. In the first C site, C(1) is bonded in a 5-coordinate geometry to one Ce(2), one Ce(3), one Ce(4), one Ce(5), and one C(2) atom. In the second C site, C(2) is bonded in a 5-coordinate geometry to one Ce(1), one Ce(2), one Ce(3), one Ce(4), and one C(1) atom. There are ten inequivalent Cl sites. In the first Cl site, Cl(1) is bonded to one Ce(1), one Ce(2), one Ce(3), one Ce(4), and one Ce(5) atom to form a mixture of distorted corner and face-sharing ClCe5 trigonal bipyramids. In the second Cl site, Cl(2) is bonded in an L-shaped geometry to one Ce(1) and one Ce(4) atom. In the third Cl site, Cl(3) is bonded in an L-shaped geometry to one Ce(4) and one Ce(5) atom. In the fourth Cl site, Cl(4) is bonded in a distorted trigonal non-coplanar geometry to one Ce(3) and two equivalent Ce(1) atoms. In the fifth Cl site, Cl(5) is bonded in a distorted see-saw-like geometry to one Ce(2), one Ce(3), and two equivalent Ce(5) atoms. In the sixth Cl site, Cl(6) is bonded in a distorted trigonal planar geometry to one Ce(2), one Ce(3), and one Ce(4) atom. In the seventh Cl site, Cl(7) is bonded to one Ce(1), one Ce(2), one Ce(3), and one Ce(5) atom to form a mixture of corner and face-sharing ClCe4 trigonal pyramids. In the eighth Cl site, Cl(8) is bonded in a distorted square co-planar geometry to two equivalent Ce(1) and two equivalent Ce(4) atoms. In the ninth Cl site, Cl(9) is bonded in a square co-planar geometry to two equivalent Ce(2) and two equivalent Ce(5) atoms. In the tenth Cl site, Cl(10) is bonded in a distorted L-shaped geometry to one Ce(1), one Ce(3), and one Ce(4) atom.
Ce5C2Cl9 crystallizes in the triclinic P-1 space group. There are five inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 8-coordinate geometry to one C(2), one Cl(1), one Cl(10), one Cl(2), one Cl(7), one Cl(8), and two equivalent Cl(4) atoms. The Ce(1)-C(2) bond length is 2.37 Å. The Ce(1)-Cl(1) bond length is 3.60 Å. The Ce(1)-Cl(10) bond length is 3.64 Å. The Ce(1)-Cl(2) bond length is 2.88 Å. The Ce(1)-Cl(7) bond length is 3.29 Å. The Ce(1)-Cl(8) bond length is 2.86 Å. There is one shorter (2.92 Å) and one longer (2.94 Å) Ce(1)-Cl(4) bond length. In the second Ce site, Ce(2) is bonded in a 7-coordinate geometry to one C(1), one C(2), one Cl(1), one Cl(5), one Cl(6), one Cl(7), and one Cl(9) atom. The Ce(2)-C(1) bond length is 2.43 Å. The Ce(2)-C(2) bond length is 2.50 Å. The Ce(2)-Cl(1) bond length is 3.08 Å. The Ce(2)-Cl(5) bond length is 3.13 Å. The Ce(2)-Cl(6) bond length is 2.97 Å. The Ce(2)-Cl(7) bond length is 2.94 Å. The Ce(2)-Cl(9) bond length is 3.04 Å. In the third Ce site, Ce(3) is bonded in a 8-coordinate geometry to one C(1), one C(2), one Cl(1), one Cl(10), one Cl(4), one Cl(5), one Cl(6), and one Cl(7) atom. The Ce(3)-C(1) bond length is 2.45 Å. The Ce(3)-C(2) bond length is 2.49 Å. The Ce(3)-Cl(1) bond length is 3.49 Å. The Ce(3)-Cl(10) bond length is 2.93 Å. The Ce(3)-Cl(4) bond length is 2.95 Å. The Ce(3)-Cl(5) bond length is 2.98 Å. The Ce(3)-Cl(6) bond length is 3.15 Å. The Ce(3)-Cl(7) bond length is 3.28 Å. In the fourth Ce site, Ce(4) is bonded in a 8-coordinate geometry to one C(1), one C(2), one Cl(1), one Cl(10), one Cl(2), one Cl(3), one Cl(6), and one Cl(8) atom. The Ce(4)-C(1) bond length is 2.51 Å. The Ce(4)-C(2) bond length is 2.45 Å. The Ce(4)-Cl(1) bond length is 3.37 Å. The Ce(4)-Cl(10) bond length is 2.90 Å. The Ce(4)-Cl(2) bond length is 2.91 Å. The Ce(4)-Cl(3) bond length is 2.91 Å. The Ce(4)-Cl(6) bond length is 3.04 Å. The Ce(4)-Cl(8) bond length is 3.15 Å. In the fifth Ce site, Ce(5) is bonded in a 7-coordinate geometry to one C(1), one Cl(1), one Cl(3), one Cl(7), one Cl(9), and two equivalent Cl(5) atoms. The Ce(5)-C(1) bond length is 2.39 Å. The Ce(5)-Cl(1) bond length is 3.28 Å. The Ce(5)-Cl(3) bond length is 2.77 Å. The Ce(5)-Cl(7) bond length is 3.06 Å. The Ce(5)-Cl(9) bond length is 2.95 Å. There is one shorter (2.94 Å) and one longer (2.98 Å) Ce(5)-Cl(5) bond length. There are two inequivalent C sites. In the first C site, C(1) is bonded in a 5-coordinate geometry to one Ce(2), one Ce(3), one Ce(4), one Ce(5), and one C(2) atom. The C(1)-C(2) bond length is 1.48 Å. In the second C site, C(2) is bonded in a 5-coordinate geometry to one Ce(1), one Ce(2), one Ce(3), one Ce(4), and one C(1) atom. There are ten inequivalent Cl sites. In the first Cl site, Cl(1) is bonded to one Ce(1), one Ce(2), one Ce(3), one Ce(4), and one Ce(5) atom to form a mixture of distorted corner and face-sharing ClCe5 trigonal bipyramids. In the second Cl site, Cl(2) is bonded in an L-shaped geometry to one Ce(1) and one Ce(4) atom. In the third Cl site, Cl(3) is bonded in an L-shaped geometry to one Ce(4) and one Ce(5) atom. In the fourth Cl site, Cl(4) is bonded in a distorted trigonal non-coplanar geometry to one Ce(3) and two equivalent Ce(1) atoms. In the fifth Cl site, Cl(5) is bonded in a distorted see-saw-like geometry to one Ce(2), one Ce(3), and two equivalent Ce(5) atoms. In the sixth Cl site, Cl(6) is bonded in a distorted trigonal planar geometry to one Ce(2), one Ce(3), and one Ce(4) atom. In the seventh Cl site, Cl(7) is bonded to one Ce(1), one Ce(2), one Ce(3), and one Ce(5) atom to form a mixture of corner and face-sharing ClCe4 trigonal pyramids. In the eighth Cl site, Cl(8) is bonded in a distorted square co-planar geometry to two equivalent Ce(1) and two equivalent Ce(4) atoms. In the ninth Cl site, Cl(9) is bonded in a square co-planar geometry to two equivalent Ce(2) and two equivalent Ce(5) atoms. In the tenth Cl site, Cl(10) is bonded in a distorted L-shaped geometry to one Ce(1), one Ce(3), and one Ce(4) atom.