ZnC5H4(NO2)2 crystallizes in the monoclinic P2_1/c space group. Zn(1) is bonded to one N(1), one O(1), one O(3), one O(4), and two equivalent O(2) atoms to form corner-sharing ZnNO5 octahedra. The corner-sharing octahedral tilt angles are 56°. The Zn(1)-N(1) bond length is 2.02 Å. The Zn(1)-O(1) bond length is 2.07 Å. The Zn(1)-O(3) bond length is 2.10 Å. The Zn(1)-O(4) bond length is 2.10 Å. There is one shorter (2.33 Å) and one longer (2.35 Å) Zn(1)-O(2) bond length. There are five inequivalent C sites. In the first C site, C(4) is bonded in a distorted bent 120 degrees geometry to one O(1) and one O(2) atom. The C(4)-O(1) bond length is 1.27 Å. The C(4)-O(2) bond length is 1.27 Å. In the second C site, C(5) is bonded in a distorted bent 120 degrees geometry to one O(3) and one O(4) atom. The C(5)-O(3) bond length is 1.26 Å. The C(5)-O(4) bond length is 1.27 Å. In the third C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(2), one N(1), and one H(2) atom. The C(1)-C(2) bond length is 1.37 Å. The C(1)-N(1) bond length is 1.38 Å. The C(1)-H(2) bond length is 1.08 Å. In the fourth C site, C(2) is bonded in a distorted bent 120 degrees geometry to one C(1), one N(2), and one H(3) atom. The C(2)-N(2) bond length is 1.38 Å. The C(2)-H(3) bond length is 1.08 Å. In the fifth C site, C(3) is bonded in a trigonal planar geometry to one N(1), one N(2), and one H(4) atom. The C(3)-N(1) bond length is 1.34 Å. The C(3)-N(2) bond length is 1.35 Å. The C(3)-H(4) bond length is 1.08 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one Zn(1), one C(1), and one C(3) atom. In the second N site, N(2) is bonded in a trigonal planar geometry to one C(2), one C(3), and one H(1) atom. The N(2)-H(1) bond length is 1.04 Å. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one N(2) and one O(4) atom. The H(1)-O(4) bond length is 1.75 Å. In the second H site, H(2) is bonded in a single-bond geometry to one C(1) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(2) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(3) atom. There are four inequivalent O sites. In the first O site, O(4) is bonded in a 3-coordinate geometry to one Zn(1), one C(5), and one H(1) atom. In the second O site, O(1) is bonded in a bent 120 degrees geometry to one Zn(1) and one C(4) atom. In the third O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent Zn(1) and one C(4) atom. In the fourth O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Zn(1) and one C(5) atom. Linkers: 3 [O]C(=O)C([O])=O. Metal clusters: 4 [Zn]. The MOF has largest included sphere 2.01 A, density 2.25 g/cm3, surface area 3088.94 m2/g, accessible volume 0.06 cm3/g