BaC2H6(N2O)4 crystallizes in the monoclinic C2/c space group. Ba(1) is bonded in a 10-coordinate geometry to two equivalent N(2), two equivalent N(3), two equivalent O(1), and four equivalent O(2) atoms. Both Ba(1)-N(2) bond lengths are 3.07 Å. Both Ba(1)-N(3) bond lengths are 3.09 Å. Both Ba(1)-O(1) bond lengths are 2.87 Å. There are two shorter (2.97 Å) and two longer (3.00 Å) Ba(1)-O(2) bond lengths. C(1) is bonded in a trigonal planar geometry to one N(1), one N(4), and one O(1) atom. The C(1)-N(1) bond length is 1.36 Å. The C(1)-N(4) bond length is 1.36 Å. The C(1)-O(1) bond length is 1.28 Å. There are four inequivalent N sites. In the first N site, N(1) is bonded in a distorted trigonal non-coplanar geometry to one C(1), one N(2), and one H(1) atom. The N(1)-N(2) bond length is 1.35 Å. The N(1)-H(1) bond length is 1.59 Å. In the second N site, N(2) is bonded in a trigonal planar geometry to one Ba(1), one N(1), and one N(3) atom. The N(2)-N(3) bond length is 1.31 Å. In the third N site, N(3) is bonded in a distorted trigonal planar geometry to one Ba(1), one N(2), and one N(4) atom. The N(3)-N(4) bond length is 1.34 Å. In the fourth N site, N(4) is bonded in a 3-coordinate geometry to one C(1), one N(3), and one H(1) atom. The N(4)-H(1) bond length is 1.07 Å. There are three inequivalent H sites. In the first H site, H(1) is bonded in a distorted linear geometry to one N(1) and one N(4) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(2) atom. The H(2)-O(2) bond length is 1.00 Å. In the third H site, H(3) is bonded in a single-bond geometry to one O(2) atom. The H(3)-O(2) bond length is 0.99 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Ba(1) and one C(1) atom. In the second O site, O(2) is bonded in a water-like geometry to two equivalent Ba(1), one H(2), and one H(3) atom. Linkers: 4 O=C1[N]N=NN1. Metal clusters: 2 [Ba]. The MOF has largest included sphere 1.51 A, density 2.64 g/cm3, surface area 2390.61 m2/g, accessible volume 0.06 cm3/g