Rb2Cu4H3(S2O9)2H2O2 crystallizes in the triclinic P-1 space group. The structure consists of two water molecules inside a Rb2Cu4H3(S2O9)2 framework. In the Rb2Cu4H3(S2O9)2 framework, there are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 4-coordinate geometry to two equivalent O(3) and two equivalent O(4) atoms. In the second Rb site, Rb(2) is bonded in a 2-coordinate geometry to two equivalent O(9) atoms. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(1), one O(4), and two equivalent O(5) atoms to form distorted edge-sharing CuO4 trigonal pyramids. In the second Cu site, Cu(2) is bonded in a square co-planar geometry to one O(10), one O(2), one O(5), and one O(6) atom. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(4) atom. In the second H site, H(3) is bonded in a linear geometry to two equivalent O(6) atoms. There are two inequivalent S sites. In the first S site, S(1) is bonded in a trigonal non-coplanar geometry to one O(10), one O(3), and one O(8) atom. In the second S site, S(2) is bonded in a trigonal non-coplanar geometry to one O(1), one O(2), and one O(9) atom. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Cu(1) and one S(2) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Cu(2) and one S(2) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Rb(1) and one S(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Rb(1), one Cu(1), and one H(1) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Cu(2) and two equivalent Cu(1) atoms. In the sixth O site, O(6) is bonded in a 1-coordinate geometry to one Cu(2) and one H(3) atom. In the seventh O site, O(8) is bonded in a single-bond geometry to one S(1) atom. In the eighth O site, O(9) is bonded in a distorted single-bond geometry to one Rb(2) and one S(2) atom. In the ninth O site, O(10) is bonded in a distorted bent 120 degrees geometry to one Cu(2) and one S(1) atom.
Rb2Cu4H3(S2O9)2H2O2 crystallizes in the triclinic P-1 space group. The structure consists of two water molecules inside a Rb2Cu4H3(S2O9)2 framework. In the Rb2Cu4H3(S2O9)2 framework, there are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 4-coordinate geometry to two equivalent O(3) and two equivalent O(4) atoms. Both Rb(1)-O(3) bond lengths are 2.92 Å. Both Rb(1)-O(4) bond lengths are 3.07 Å. In the second Rb site, Rb(2) is bonded in a 2-coordinate geometry to two equivalent O(9) atoms. Both Rb(2)-O(9) bond lengths are 2.90 Å. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(1), one O(4), and two equivalent O(5) atoms to form distorted edge-sharing CuO4 trigonal pyramids. The Cu(1)-O(1) bond length is 2.16 Å. The Cu(1)-O(4) bond length is 1.82 Å. There is one shorter (1.90 Å) and one longer (1.94 Å) Cu(1)-O(5) bond length. In the second Cu site, Cu(2) is bonded in a square co-planar geometry to one O(10), one O(2), one O(5), and one O(6) atom. The Cu(2)-O(10) bond length is 1.97 Å. The Cu(2)-O(2) bond length is 2.04 Å. The Cu(2)-O(5) bond length is 1.88 Å. The Cu(2)-O(6) bond length is 2.01 Å. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(4) atom. The H(1)-O(4) bond length is 0.98 Å. In the second H site, H(3) is bonded in a linear geometry to two equivalent O(6) atoms. Both H(3)-O(6) bond lengths are 1.22 Å. There are two inequivalent S sites. In the first S site, S(1) is bonded in a trigonal non-coplanar geometry to one O(10), one O(3), and one O(8) atom. The S(1)-O(10) bond length is 1.52 Å. The S(1)-O(3) bond length is 1.45 Å. The S(1)-O(8) bond length is 1.45 Å. In the second S site, S(2) is bonded in a trigonal non-coplanar geometry to one O(1), one O(2), and one O(9) atom. The S(2)-O(1) bond length is 1.46 Å. The S(2)-O(2) bond length is 1.49 Å. The S(2)-O(9) bond length is 1.46 Å. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Cu(1) and one S(2) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Cu(2) and one S(2) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Rb(1) and one S(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Rb(1), one Cu(1), and one H(1) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Cu(2) and two equivalent Cu(1) atoms. In the sixth O site, O(6) is bonded in a 1-coordinate geometry to one Cu(2) and one H(3) atom. In the seventh O site, O(8) is bonded in a single-bond geometry to one S(1) atom. In the eighth O site, O(9) is bonded in a distorted single-bond geometry to one Rb(2) and one S(2) atom. In the ninth O site, O(10) is bonded in a distorted bent 120 degrees geometry to one Cu(2) and one S(1) atom.