RbMg(O2Br)3 crystallizes in the monoclinic C2/c space group. Rb(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(3), and four equivalent Br(2) atoms. Mg(1) is bonded in an octahedral geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded in a trigonal non-coplanar geometry to one Rb(1), one Mg(1), and one Br(1) atom. In the second O site, O(2) is bonded in a water-like geometry to one Mg(1) and one Br(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Rb(1), one Mg(1), and one Br(2) atom. There are two inequivalent Br sites. In the first Br site, Br(1) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(2) atoms. In the second Br site, Br(2) is bonded in a distorted single-bond geometry to two equivalent Rb(1) and one O(3) atom.
RbMg(O2Br)3 crystallizes in the monoclinic C2/c space group. Rb(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(3), and four equivalent Br(2) atoms. Both Rb(1)-O(1) bond lengths are 2.85 Å. Both Rb(1)-O(3) bond lengths are 2.91 Å. There are two shorter (3.69 Å) and two longer (3.72 Å) Rb(1)-Br(2) bond lengths. Mg(1) is bonded in an octahedral geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. Both Mg(1)-O(1) bond lengths are 2.10 Å. Both Mg(1)-O(2) bond lengths are 2.14 Å. Both Mg(1)-O(3) bond lengths are 2.11 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a trigonal non-coplanar geometry to one Rb(1), one Mg(1), and one Br(1) atom. The O(1)-Br(1) bond length is 1.78 Å. In the second O site, O(2) is bonded in a water-like geometry to one Mg(1) and one Br(1) atom. The O(2)-Br(1) bond length is 1.75 Å. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Rb(1), one Mg(1), and one Br(2) atom. The O(3)-Br(2) bond length is 1.78 Å. There are two inequivalent Br sites. In the first Br site, Br(1) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(2) atoms. In the second Br site, Br(2) is bonded in a distorted single-bond geometry to two equivalent Rb(1) and one O(3) atom.