Cs2U(OBr2)2 crystallizes in the monoclinic P2_1/c space group. Cs(1) is bonded in a 10-coordinate geometry to two equivalent O(1), four equivalent Br(1), and four equivalent Br(2) atoms. U(1) is bonded in a distorted linear geometry to two equivalent O(1), two equivalent Br(1), and two equivalent Br(2) atoms. O(1) is bonded in a distorted single-bond geometry to two equivalent Cs(1) and one U(1) atom. There are two inequivalent Br sites. In the first Br site, Br(1) is bonded in a 5-coordinate geometry to four equivalent Cs(1) and one U(1) atom. In the second Br site, Br(2) is bonded to four equivalent Cs(1) and one U(1) atom to form a mixture of distorted corner and edge-sharing BrCs4U trigonal bipyramids.
Cs2U(OBr2)2 crystallizes in the monoclinic P2_1/c space group. Cs(1) is bonded in a 10-coordinate geometry to two equivalent O(1), four equivalent Br(1), and four equivalent Br(2) atoms. There is one shorter (3.30 Å) and one longer (3.47 Å) Cs(1)-O(1) bond length. There are a spread of Cs(1)-Br(1) bond distances ranging from 3.82-4.13 Å. There are a spread of Cs(1)-Br(2) bond distances ranging from 3.70-3.85 Å. U(1) is bonded in a distorted linear geometry to two equivalent O(1), two equivalent Br(1), and two equivalent Br(2) atoms. Both U(1)-O(1) bond lengths are 1.81 Å. Both U(1)-Br(1) bond lengths are 2.83 Å. Both U(1)-Br(2) bond lengths are 2.84 Å. O(1) is bonded in a distorted single-bond geometry to two equivalent Cs(1) and one U(1) atom. There are two inequivalent Br sites. In the first Br site, Br(1) is bonded in a 5-coordinate geometry to four equivalent Cs(1) and one U(1) atom. In the second Br site, Br(2) is bonded to four equivalent Cs(1) and one U(1) atom to form a mixture of distorted corner and edge-sharing BrCs4U trigonal bipyramids.