Sr(O3Br)2 crystallizes in the monoclinic C2 space group. Sr(1) is bonded in a 7-coordinate geometry to one O(4), two equivalent O(3), and four equivalent O(1) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Sr(1) and one Br(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to two equivalent Br(1) atoms. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Sr(1) and one Br(1) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Sr(1) and two equivalent Br(1) atoms. Br(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(2), one O(3), and one O(4) atom.
Sr(O3Br)2 crystallizes in the monoclinic C2 space group. Sr(1) is bonded in a 7-coordinate geometry to one O(4), two equivalent O(3), and four equivalent O(1) atoms. The Sr(1)-O(4) bond length is 2.49 Å. Both Sr(1)-O(3) bond lengths are 2.66 Å. There are two shorter (2.65 Å) and two longer (2.81 Å) Sr(1)-O(1) bond lengths. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Sr(1) and one Br(1) atom. The O(1)-Br(1) bond length is 1.75 Å. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to two equivalent Br(1) atoms. Both O(2)-Br(1) bond lengths are 2.00 Å. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Sr(1) and one Br(1) atom. The O(3)-Br(1) bond length is 1.67 Å. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Sr(1) and two equivalent Br(1) atoms. Both O(4)-Br(1) bond lengths are 2.11 Å. Br(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(2), one O(3), and one O(4) atom.