Sr2Cu2Te(O3Br)2 crystallizes in the monoclinic P2_1/c space group. Sr(1) is bonded in a 7-coordinate geometry to one O(1), one O(3), two equivalent O(2), and three equivalent Br(1) atoms. Cu(1) is bonded in a 6-coordinate geometry to one O(2), two equivalent O(1), two equivalent O(3), and one Br(1) atom. Te(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 rectangular see-saw-like geometry to one Sr(1), two equivalent Cu(1), and one Te(1) atom. In the second O site, O(2) is bonded to two equivalent Sr(1), one Cu(1), and one Te(1) atom to form distorted OSr2CuTe trigonal pyramids that share corners with two equivalent O(3)SrCu2Te trigonal pyramids, corners with three equivalent O(2)Sr2CuTe trigonal pyramids, and edges with two equivalent O(3)SrCu2Te trigonal pyramids. In the third O site, O(3) is bonded to one Sr(1), two equivalent Cu(1), and one Te(1) atom to form distorted OSrCu2Te trigonal pyramids that share corners with two equivalent O(2)Sr2CuTe trigonal pyramids, corners with three equivalent O(3)SrCu2Te trigonal pyramids, and edges with two equivalent O(2)Sr2CuTe trigonal pyramids. Br(1) is bonded in a 4-coordinate geometry to three equivalent Sr(1) and one Cu(1) atom.
Sr2Cu2Te(O3Br)2 crystallizes in the monoclinic P2_1/c space group. Sr(1) is bonded in a 7-coordinate geometry to one O(1), one O(3), two equivalent O(2), and three equivalent Br(1) atoms. The Sr(1)-O(1) bond length is 2.50 Å. The Sr(1)-O(3) bond length is 2.63 Å. There is one shorter (2.67 Å) and one longer (2.82 Å) Sr(1)-O(2) bond length. There are a spread of Sr(1)-Br(1) bond distances ranging from 3.11-3.21 Å. Cu(1) is bonded in a 6-coordinate geometry to one O(2), two equivalent O(1), two equivalent O(3), and one Br(1) atom. The Cu(1)-O(2) bond length is 2.02 Å. There is one shorter (1.98 Å) and one longer (2.43 Å) Cu(1)-O(1) bond length. There is one shorter (1.96 Å) and one longer (2.02 Å) Cu(1)-O(3) bond length. The Cu(1)-Br(1) bond length is 3.02 Å. Te(1) is bonded in an octahedral geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. Both Te(1)-O(1) bond lengths are 1.95 Å. Both Te(1)-O(2) bond lengths are 1.97 Å. Both Te(1)-O(3) bond lengths are 1.99 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Sr(1), two equivalent Cu(1), and one Te(1) atom. In the second O site, O(2) is bonded to two equivalent Sr(1), one Cu(1), and one Te(1) atom to form distorted OSr2CuTe trigonal pyramids that share corners with two equivalent O(3)SrCu2Te trigonal pyramids, corners with three equivalent O(2)Sr2CuTe trigonal pyramids, and edges with two equivalent O(3)SrCu2Te trigonal pyramids. In the third O site, O(3) is bonded to one Sr(1), two equivalent Cu(1), and one Te(1) atom to form distorted OSrCu2Te trigonal pyramids that share corners with two equivalent O(2)Sr2CuTe trigonal pyramids, corners with three equivalent O(3)SrCu2Te trigonal pyramids, and edges with two equivalent O(2)Sr2CuTe trigonal pyramids. Br(1) is bonded in a 4-coordinate geometry to three equivalent Sr(1) and one Cu(1) atom.