(CaN2O9)2O2 crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of two hydrogen peroxide molecules and two CaN2O9 clusters. In each CaN2O9 cluster, Ca(1) is bonded in a 7-coordinate geometry to one O(1), one O(10), one O(2), one O(5), one O(8), and two equivalent O(4) atoms. There are two inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. In the second N site, N(2) is bonded in a trigonal planar geometry to one O(4), one O(5), and one O(6) atom. There are nine inequivalent O sites. In the first O site, O(6) is bonded in a single-bond geometry to one N(2) atom. In the second O site, O(7) is bonded in a bent 120 degrees geometry to one O(10) and one O(8) atom. In the third O site, O(8) is bonded in an L-shaped geometry to one Ca(1) and one O(7) atom. In the fourth O site, O(1) is bonded in an L-shaped geometry to one Ca(1) and one N(1) atom. In the fifth O site, O(2) is bonded in an L-shaped geometry to one Ca(1) and one N(1) atom. In the sixth O site, O(10) is bonded in a water-like geometry to one Ca(1) and one O(7) atom. In the seventh O site, O(3) is bonded in a single-bond geometry to one N(1) atom. In the eighth O site, O(4) is bonded in a distorted bent 150 degrees geometry to two equivalent Ca(1) and one N(2) atom. In the ninth O site, O(5) is bonded in a water-like geometry to one Ca(1) and one N(2) atom.
(CaN2O9)2O2 crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of two hydrogen peroxide molecules and two CaN2O9 clusters. In each CaN2O9 cluster, Ca(1) is bonded in a 7-coordinate geometry to one O(1), one O(10), one O(2), one O(5), one O(8), and two equivalent O(4) atoms. The Ca(1)-O(1) bond length is 2.39 Å. The Ca(1)-O(10) bond length is 2.58 Å. The Ca(1)-O(2) bond length is 2.44 Å. The Ca(1)-O(5) bond length is 2.41 Å. The Ca(1)-O(8) bond length is 2.74 Å. There is one shorter (2.36 Å) and one longer (2.84 Å) Ca(1)-O(4) bond length. There are two inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. The N(1)-O(1) bond length is 1.29 Å. The N(1)-O(2) bond length is 1.29 Å. The N(1)-O(3) bond length is 1.23 Å. In the second N site, N(2) is bonded in a trigonal planar geometry to one O(4), one O(5), and one O(6) atom. The N(2)-O(4) bond length is 1.30 Å. The N(2)-O(5) bond length is 1.28 Å. The N(2)-O(6) bond length is 1.22 Å. There are nine inequivalent O sites. In the first O site, O(6) is bonded in a single-bond geometry to one N(2) atom. In the second O site, O(7) is bonded in a bent 120 degrees geometry to one O(10) and one O(8) atom. The O(7)-O(10) bond length is 1.31 Å. The O(7)-O(8) bond length is 1.30 Å. In the third O site, O(8) is bonded in an L-shaped geometry to one Ca(1) and one O(7) atom. In the fourth O site, O(1) is bonded in an L-shaped geometry to one Ca(1) and one N(1) atom. In the fifth O site, O(2) is bonded in an L-shaped geometry to one Ca(1) and one N(1) atom. In the sixth O site, O(10) is bonded in a water-like geometry to one Ca(1) and one O(7) atom. In the seventh O site, O(3) is bonded in a single-bond geometry to one N(1) atom. In the eighth O site, O(4) is bonded in a distorted bent 150 degrees geometry to two equivalent Ca(1) and one N(2) atom. In the ninth O site, O(5) is bonded in a water-like geometry to one Ca(1) and one N(2) atom.