Fe2C4O9Cl2 crystallizes in the orthorhombic Fdd2 space group. Fe(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one Cl(1) atom to form corner-sharing FeClO5 octahedra. The corner-sharing octahedral tilt angles are 41°. There are two inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one O(2) and one O(4) atom. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one O(1) and one O(3) atom. There are five inequivalent O sites. In the first O site, O(1) is bonded in a water-like geometry to one Fe(1) and one C(2) atom. In the second O site, O(2) is bonded in a water-like geometry to one Fe(1) and one C(1) atom. In the third O site, O(3) is bonded in a water-like geometry to one Fe(1) and one C(2) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Fe(1) and one C(1) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to two equivalent Fe(1) atoms. Cl(1) is bonded in a single-bond geometry to one Fe(1) atom.
Fe2C4O9Cl2 crystallizes in the orthorhombic Fdd2 space group. Fe(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one Cl(1) atom to form corner-sharing FeClO5 octahedra. The corner-sharing octahedral tilt angles are 41°. The Fe(1)-O(1) bond length is 2.05 Å. The Fe(1)-O(2) bond length is 2.04 Å. The Fe(1)-O(3) bond length is 1.97 Å. The Fe(1)-O(4) bond length is 2.01 Å. The Fe(1)-O(5) bond length is 1.82 Å. The Fe(1)-Cl(1) bond length is 2.22 Å. There are two inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one O(2) and one O(4) atom. The C(1)-O(2) bond length is 1.27 Å. The C(1)-O(4) bond length is 1.27 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one O(1) and one O(3) atom. The C(2)-O(1) bond length is 1.26 Å. The C(2)-O(3) bond length is 1.28 Å. There are five inequivalent O sites. In the first O site, O(1) is bonded in a water-like geometry to one Fe(1) and one C(2) atom. In the second O site, O(2) is bonded in a water-like geometry to one Fe(1) and one C(1) atom. In the third O site, O(3) is bonded in a water-like geometry to one Fe(1) and one C(2) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Fe(1) and one C(1) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to two equivalent Fe(1) atoms. Cl(1) is bonded in a single-bond geometry to one Fe(1) atom.