Eu(O2Cl)3 crystallizes in the monoclinic P2/c space group. Eu(1) is bonded in a 8-coordinate geometry to two equivalent O(2), two equivalent O(3), and four equivalent O(1) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Eu(1) and one Cl(2) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Eu(1) and one O(2) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Eu(1) and one Cl(1) atom. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a bent 120 degrees geometry to two equivalent O(3) atoms. In the second Cl site, Cl(2) is bonded in a single-bond geometry to one O(1) atom.
Eu(O2Cl)3 crystallizes in the monoclinic P2/c space group. Eu(1) is bonded in a 8-coordinate geometry to two equivalent O(2), two equivalent O(3), and four equivalent O(1) atoms. Both Eu(1)-O(2) bond lengths are 2.72 Å. Both Eu(1)-O(3) bond lengths are 2.57 Å. There are two shorter (2.43 Å) and two longer (2.50 Å) Eu(1)-O(1) bond lengths. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Eu(1) and one Cl(2) atom. The O(1)-Cl(2) bond length is 1.66 Å. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Eu(1) and one O(2) atom. The O(2)-O(2) bond length is 1.27 Å. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Eu(1) and one Cl(1) atom. The O(3)-Cl(1) bond length is 1.54 Å. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a bent 120 degrees geometry to two equivalent O(3) atoms. In the second Cl site, Cl(2) is bonded in a single-bond geometry to one O(1) atom.