ZnC9H3(NO)4 crystallizes in the monoclinic P2_1/c space group. Zn(1) is bonded in a 4-coordinate geometry to one N(1), one N(4), one O(1), and one O(4) atom. The Zn(1)-N(1) bond length is 2.00 Å. The Zn(1)-N(4) bond length is 2.00 Å. The Zn(1)-O(1) bond length is 2.00 Å. The Zn(1)-O(4) bond length is 2.01 Å. There are nine inequivalent C sites. In the first C site, C(1) is bonded in a bent 120 degrees geometry to one C(4), one O(1), and one O(2) atom. The C(1)-C(4) bond length is 1.52 Å. The C(1)-O(1) bond length is 1.27 Å. The C(1)-O(2) bond length is 1.23 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one C(6), one O(3), and one O(4) atom. The C(2)-C(6) bond length is 1.52 Å. The C(2)-O(3) bond length is 1.23 Å. The C(2)-O(4) bond length is 1.28 Å. In the third C site, C(3) is bonded in a distorted trigonal planar geometry to one C(8), one N(1), and one N(4) atom. The C(3)-C(8) bond length is 1.48 Å. The C(3)-N(1) bond length is 1.31 Å. The C(3)-N(4) bond length is 1.33 Å. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one C(1), one C(5), and one C(9) atom. The C(4)-C(5) bond length is 1.39 Å. The C(4)-C(9) bond length is 1.39 Å. In the fifth C site, C(5) is bonded in a distorted single-bond geometry to one C(4), one C(6), and one H(1) atom. The C(5)-C(6) bond length is 1.39 Å. The C(5)-H(1) bond length is 0.93 Å. In the sixth C site, C(6) is bonded in a trigonal planar geometry to one C(2), one C(5), and one C(7) atom. The C(6)-C(7) bond length is 1.40 Å. In the seventh C site, C(7) is bonded in a distorted single-bond geometry to one C(6), one C(8), and one H(2) atom. The C(7)-C(8) bond length is 1.41 Å. The C(7)-H(2) bond length is 0.93 Å. In the eighth C site, C(8) is bonded in a trigonal planar geometry to one C(3), one C(7), and one C(9) atom. The C(8)-C(9) bond length is 1.40 Å. In the ninth C site, C(9) is bonded in a distorted single-bond geometry to one C(4), one C(8), and one H(3) atom. The C(9)-H(3) bond length is 0.93 Å. There are four inequivalent N sites. In the first N site, N(1) is bonded in a 3-coordinate geometry to one Zn(1), one C(3), and one N(2) atom. The N(1)-N(2) bond length is 1.36 Å. In the second N site, N(2) is bonded in a water-like geometry to 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 water-like geometry to one N(2) and one N(4) atom. The N(3)-N(4) bond length is 1.33 Å. In the fourth N site, N(4) is bonded in a 3-coordinate geometry to one Zn(1), one C(3), and one N(3) atom. There are three inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(5) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(7) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(9) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a water-like geometry to one Zn(1) and one C(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to one C(1) atom. In the third O site, O(3) is bonded in a single-bond geometry to one C(2) atom. In the fourth O site, O(4) is bonded in a water-like geometry to one Zn(1) and one C(2) atom. Linkers: 4 [O]C(=O)c1cc(C([O])=O)cc(C2=NN=N[N]2)c1. Metal clusters: 4 O=[C]O[Zn]O[C]=O. The MOF has largest included sphere 4.04 A, density 1.43 g/cm3, surface area 4000.24 m2/g, accessible volume 0.29 cm3/g