NiC8N2H5O5CH2 crystallizes in the orthorhombic P2_12_12 space group. The structure consists of four 02329_fluka molecules inside a NiC8N2H5O5 framework. In the NiC8N2H5O5 framework, Ni(1) is bonded in an octahedral geometry to one N(1), one O(1), one O(2), one O(3), one O(4), and one O(5) atom. The Ni(1)-N(1) bond length is 2.09 Å. The Ni(1)-O(1) bond length is 2.09 Å. The Ni(1)-O(2) bond length is 2.05 Å. The Ni(1)-O(3) bond length is 2.01 Å. The Ni(1)-O(4) bond length is 2.07 Å. The Ni(1)-O(5) bond length is 2.14 Å. There are eight inequivalent C sites. In the first C site, C(1) is bonded in a distorted single-bond geometry to one C(6), one C(7), and one H(1) atom. The C(1)-C(6) bond length is 1.37 Å. The C(1)-C(7) bond length is 1.35 Å. The C(1)-H(1) bond length is 0.93 Å. In the second C site, C(2) is bonded in a distorted water-like geometry to one H(2) and one O(5) atom. The C(2)-H(2) bond length is 0.98 Å. The C(2)-O(5) bond length is 1.42 Å. In the third C site, C(4) is bonded in a distorted bent 120 degrees geometry to one O(1) and one O(4) atom. The C(4)-O(1) bond length is 1.24 Å. The C(4)-O(4) bond length is 1.27 Å. In the fourth C site, C(5) is bonded in a distorted bent 120 degrees geometry to one O(2) and one O(3) atom. The C(5)-O(2) bond length is 1.26 Å. The C(5)-O(3) bond length is 1.26 Å. In the fifth C site, C(6) is bonded in a distorted trigonal planar geometry to one C(1), one N(1), and one H(5) atom. The C(6)-N(1) bond length is 1.33 Å. The C(6)-H(5) bond length is 0.93 Å. In the sixth C site, C(7) is bonded in a distorted trigonal planar geometry to one C(1), one C(9), and one N(2) atom. The C(7)-C(9) bond length is 1.39 Å. The C(7)-N(2) bond length is 1.44 Å. In the seventh C site, C(8) is bonded in a distorted bent 120 degrees geometry to one N(1) and one H(6) atom. The C(8)-N(1) bond length is 1.33 Å. The C(8)-H(6) bond length is 0.93 Å. In the eighth C site, C(9) is bonded in a distorted single-bond geometry to one C(7) and one H(7) atom. The C(9)-H(7) bond length is 0.93 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one Ni(1), one C(6), and one C(8) atom. In the second N site, N(2) is bonded in a distorted bent 120 degrees geometry to one C(7) and one N(2) atom. The N(2)-N(2) bond length is 1.24 Å. There are five inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(2) atom. In the third H site, H(5) is bonded in a single-bond geometry to one C(6) atom. In the fourth H site, H(6) is bonded in a single-bond geometry to one C(8) atom. In the fifth H site, H(7) is bonded in a single-bond geometry to one C(9) atom. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Ni(1) and one C(4) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Ni(1) and one C(5) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Ni(1) and one C(5) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Ni(1) and one C(4) atom. In the fifth O site, O(5) is bonded in a water-like geometry to one Ni(1) and one C(2) atom. Linkers: 3 c1cc([N][N]c2ccncc2)ccn1 ,4 [O]C(=O)C[C@H]([O])C([O])=O ,2 [c]1cc([N][N]c2ccncc2)ccn1. Metal clusters: 4 [Ni]. RCSR code: hcb. The MOF has largest included sphere 5.39 A, density 1.40 g/cm3, surface area 3851.02 m2/g, accessible volume 0.30 cm3/g