CuP2(H2O3)2 crystallizes in the monoclinic P2_1/c space group. Cu(1) is bonded in a distorted see-saw-like geometry to one O(1), one O(2), one O(3), and one O(4) atom. There are two inequivalent P sites. In the first P site, P(1) is bonded in a distorted tetrahedral geometry to one H(1), one O(1), one O(2), and one O(3) atom. In the second P site, P(2) is bonded in a distorted tetrahedral geometry to one H(2), one O(4), one O(5), and one O(6) atom. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one P(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one P(2) atom. In the third H site, H(3) is bonded in a distorted linear geometry to one O(3) and one O(6) atom. In the fourth H site, H(4) is bonded in a linear geometry to one O(1) and one O(5) atom. There are six inequivalent O sites. In the first O site, O(2) is bonded in a bent 120 degrees geometry to one Cu(1) and one P(1) atom. In the second O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to one Cu(1), one P(1), and one H(3) atom. In the third O site, O(4) is bonded in a bent 150 degrees geometry to one Cu(1) and one P(2) atom. In the fourth O site, O(5) is bonded in a bent 120 degrees geometry to one P(2) and one H(4) atom. In the fifth O site, O(6) is bonded in a bent 120 degrees geometry to one P(2) and one H(3) atom. In the sixth O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Cu(1), one P(1), and one H(4) atom.
CuP2(H2O3)2 crystallizes in the monoclinic P2_1/c space group. Cu(1) is bonded in a distorted see-saw-like geometry to one O(1), one O(2), one O(3), and one O(4) atom. The Cu(1)-O(1) bond length is 1.97 Å. The Cu(1)-O(2) bond length is 1.92 Å. The Cu(1)-O(3) bond length is 2.26 Å. The Cu(1)-O(4) bond length is 1.91 Å. There are two inequivalent P sites. In the first P site, P(1) is bonded in a distorted tetrahedral geometry to one H(1), one O(1), one O(2), and one O(3) atom. The P(1)-H(1) bond length is 1.41 Å. The P(1)-O(1) bond length is 1.56 Å. The P(1)-O(2) bond length is 1.54 Å. The P(1)-O(3) bond length is 1.54 Å. In the second P site, P(2) is bonded in a distorted tetrahedral geometry to one H(2), one O(4), one O(5), and one O(6) atom. The P(2)-H(2) bond length is 1.40 Å. The P(2)-O(4) bond length is 1.52 Å. The P(2)-O(5) bond length is 1.57 Å. The P(2)-O(6) bond length is 1.56 Å. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one P(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one P(2) atom. In the third H site, H(3) is bonded in a distorted linear geometry to one O(3) and one O(6) atom. The H(3)-O(3) bond length is 1.52 Å. The H(3)-O(6) bond length is 1.04 Å. In the fourth H site, H(4) is bonded in a linear geometry to one O(1) and one O(5) atom. The H(4)-O(1) bond length is 1.55 Å. The H(4)-O(5) bond length is 1.03 Å. There are six inequivalent O sites. In the first O site, O(2) is bonded in a bent 120 degrees geometry to one Cu(1) and one P(1) atom. In the second O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to one Cu(1), one P(1), and one H(3) atom. In the third O site, O(4) is bonded in a bent 150 degrees geometry to one Cu(1) and one P(2) atom. In the fourth O site, O(5) is bonded in a bent 120 degrees geometry to one P(2) and one H(4) atom. In the fifth O site, O(6) is bonded in a bent 120 degrees geometry to one P(2) and one H(3) atom. In the sixth O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Cu(1), one P(1), and one H(4) atom.