Rb(AsO3)2(HAsO2)2HO2 crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one water dimer molecule, two HAsO2 clusters, and one Rb(AsO3)2 cluster. In each HAsO2 cluster, As(3) is bonded in a distorted linear geometry to one O(11) and one O(7) atom. H(1) is bonded in a distorted single-bond geometry to one O(11) atom. There are two inequivalent O sites. In the first O site, O(11) is bonded in a 2-coordinate geometry to one As(3) and one H(1) atom. In the second O site, O(7) is bonded in a single-bond geometry to one As(3) atom. In the Rb(AsO3)2 cluster, Rb(1) is bonded in a distorted linear geometry to one O(3) and one O(4) atom. There are two inequivalent As sites. In the first As site, As(1) is bonded in a 3-coordinate geometry to one O(3), one O(5), and one O(9) atom. In the second As site, As(2) is bonded in a 3-coordinate geometry to one O(10), one O(4), and one O(6) atom. There are six inequivalent O sites. In the first O site, O(3) is bonded in a distorted L-shaped geometry to one Rb(1) and one As(1) atom. In the second O site, O(4) is bonded in a distorted L-shaped geometry to one Rb(1) and one As(2) atom. In the third O site, O(5) is bonded in a single-bond geometry to one As(1) atom. In the fourth O site, O(6) is bonded in a single-bond geometry to one As(2) atom. In the fifth O site, O(9) is bonded in a distorted single-bond geometry to one As(1) atom. In the sixth O site, O(10) is bonded in a 1-coordinate geometry to one As(2) atom.
Rb(AsO3)2(HAsO2)2HO2 crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one water dimer molecule, two HAsO2 clusters, and one Rb(AsO3)2 cluster. In each HAsO2 cluster, As(3) is bonded in a distorted linear geometry to one O(11) and one O(7) atom. The As(3)-O(11) bond length is 1.39 Å. The As(3)-O(7) bond length is 1.37 Å. H(1) is bonded in a distorted single-bond geometry to one O(11) atom. The H(1)-O(11) bond length is 1.36 Å. There are two inequivalent O sites. In the first O site, O(11) is bonded in a 2-coordinate geometry to one As(3) and one H(1) atom. In the second O site, O(7) is bonded in a single-bond geometry to one As(3) atom. In the Rb(AsO3)2 cluster, Rb(1) is bonded in a distorted linear geometry to one O(3) and one O(4) atom. The Rb(1)-O(3) bond length is 2.36 Å. The Rb(1)-O(4) bond length is 2.33 Å. There are two inequivalent As sites. In the first As site, As(1) is bonded in a 3-coordinate geometry to one O(3), one O(5), and one O(9) atom. The As(1)-O(3) bond length is 1.34 Å. The As(1)-O(5) bond length is 1.56 Å. The As(1)-O(9) bond length is 1.93 Å. In the second As site, As(2) is bonded in a 3-coordinate geometry to one O(10), one O(4), and one O(6) atom. The As(2)-O(10) bond length is 2.02 Å. The As(2)-O(4) bond length is 1.43 Å. The As(2)-O(6) bond length is 1.59 Å. There are six inequivalent O sites. In the first O site, O(3) is bonded in a distorted L-shaped geometry to one Rb(1) and one As(1) atom. In the second O site, O(4) is bonded in a distorted L-shaped geometry to one Rb(1) and one As(2) atom. In the third O site, O(5) is bonded in a single-bond geometry to one As(1) atom. In the fourth O site, O(6) is bonded in a single-bond geometry to one As(2) atom. In the fifth O site, O(9) is bonded in a distorted single-bond geometry to one As(1) atom. In the sixth O site, O(10) is bonded in a 1-coordinate geometry to one As(2) atom.