NiC10H12(N2O)2(CO)2(H2O)2 is Indium-derived structured and crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of four formaldehyde molecules, four water molecules, and two NiC10H12(N2O)2 clusters. In each NiC10H12(N2O)2 cluster, Ni(1) is bonded in a square co-planar geometry to two equivalent N(1) and two equivalent O(1) atoms. Both Ni(1)-N(1) bond lengths are 1.90 Å. Both Ni(1)-O(1) bond lengths are 1.90 Å. There are five inequivalent C sites. In the first C site, C(1) is bonded in a single-bond geometry to one O(1) atom. The C(1)-O(1) bond length is 1.27 Å. In the second C site, C(3) is bonded in a distorted bent 120 degrees geometry to one C(4), one N(1), and one H(1) atom. The C(3)-C(4) bond length is 1.38 Å. The C(3)-N(1) bond length is 1.39 Å. The C(3)-H(1) bond length is 1.09 Å. In the third C site, C(4) is bonded in a distorted single-bond geometry to one C(3), one C(6), and one N(2) atom. The C(4)-C(6) bond length is 1.49 Å. The C(4)-N(2) bond length is 1.38 Å. In the fourth C site, C(5) is bonded in a trigonal planar geometry to one N(1), one N(2), and one H(2) atom. The C(5)-N(1) bond length is 1.34 Å. The C(5)-N(2) bond length is 1.35 Å. The C(5)-H(2) bond length is 1.08 Å. In the fifth C site, C(6) is bonded in a distorted trigonal non-coplanar geometry to one C(4), one H(3), one H(4), and one H(5) atom. The C(6)-H(3) bond length is 1.10 Å. The C(6)-H(4) bond length is 1.10 Å. The C(6)-H(5) bond length is 1.10 Å. There are two inequivalent N sites. In the first N site, N(2) is bonded in a trigonal planar geometry to one C(4), one C(5), and one H(8) atom. The N(2)-H(8) bond length is 1.04 Å. In the second N site, N(1) is bonded in a trigonal planar geometry to one Ni(1), one C(3), and one C(5) atom. There are six inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(3) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(5) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(6) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(6) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(6) atom. In the sixth H site, H(8) is bonded in a single-bond geometry to one N(2) atom. O(1) is bonded in a bent 120 degrees geometry to one Ni(1) and one C(1) atom. Linkers: 2 O=C1C(=O)C(=O)C1=O. Metal clusters: 2 [Ni]. The MOF has largest included sphere 1.92 A, density 1.61 g/cm3, surface area 4624.96 m2/g, accessible volume 0.17 cm3/g