ZnC18H16(NO)3 crystallizes in the orthorhombic Ibca space group. The structure consists of a ZnC18H16(NO)3 framework. Zn(1) is bonded in a tetrahedral geometry to one N(2), one N(3), one O(1), and one O(3) atom. The Zn(1)-N(2) bond length is 2.00 Å. The Zn(1)-N(3) bond length is 1.97 Å. The Zn(1)-O(1) bond length is 1.95 Å. The Zn(1)-O(3) bond length is 1.99 Å. There are twenty inequivalent C sites. In the first C site, C(15) is bonded in a trigonal planar geometry to one C(16) and two equivalent C(13) atoms. The C(15)-C(16) bond length is 1.46 Å. Both C(15)-C(13) bond lengths are 1.41 Å. In the second C site, C(16) is bonded in a trigonal planar geometry to one C(15) and two equivalent C(17) atoms. Both C(16)-C(17) bond lengths are 1.41 Å. In the third C site, C(17) is bonded in a distorted trigonal planar geometry to one C(16), one C(18), and one H(15) atom. The C(17)-C(18) bond length is 1.39 Å. The C(17)-H(15) bond length is 1.09 Å. In the fourth C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(2), one O(1), and one O(2) atom. The C(1)-C(2) bond length is 1.50 Å. The C(1)-O(1) bond length is 1.30 Å. The C(1)-O(2) bond length is 1.26 Å. In the fifth C site, C(18) is bonded in a distorted trigonal planar geometry to one C(17), one C(19), and one H(16) atom. The C(18)-C(19) bond length is 1.40 Å. The C(18)-H(16) bond length is 1.09 Å. In the sixth C site, C(2) is bonded in a trigonal planar geometry to one C(1), one C(3), and one C(7) atom. The C(2)-C(3) bond length is 1.40 Å. The C(2)-C(7) bond length is 1.40 Å. In the seventh C site, C(19) is bonded in a trigonal planar geometry to one C(20) and two equivalent C(18) atoms. The C(19)-C(20) bond length is 1.48 Å. In the eighth C site, C(20) is bonded in a distorted bent 120 degrees geometry to one C(19) and two equivalent O(3) atoms. Both C(20)-O(3) bond lengths are 1.28 Å. In the ninth C site, C(3) is bonded in a distorted trigonal planar geometry to one C(2), one C(4), and one H(2) atom. The C(3)-C(4) bond length is 1.39 Å. The C(3)-H(2) bond length is 1.09 Å. In the tenth C site, C(4) is bonded in a distorted trigonal planar geometry to one C(3), one C(5), and one H(3) atom. The C(4)-C(5) bond length is 1.41 Å. The C(4)-H(3) bond length is 1.09 Å. In the eleventh C site, C(5) is bonded in a trigonal planar geometry to one C(4), one C(6), and one C(8) atom. The C(5)-C(6) bond length is 1.41 Å. The C(5)-C(8) bond length is 1.47 Å. In the twelfth C site, C(6) is bonded in a distorted single-bond geometry to one C(5) and one H(4) atom. The C(6)-H(4) bond length is 1.09 Å. In the thirteenth C site, C(7) is bonded in a distorted single-bond geometry to one C(2) and one H(5) atom. The C(7)-H(5) bond length is 1.09 Å. In the fourteenth C site, C(8) is bonded in a trigonal planar geometry to one C(10), one C(5), and one C(9) atom. The C(8)-C(10) bond length is 1.41 Å. The C(8)-C(9) bond length is 1.40 Å. In the fifteenth C site, C(9) is bonded in a distorted single-bond geometry to one C(11), one C(8), and one N(1) atom. The C(9)-C(11) bond length is 1.49 Å. The C(9)-N(1) bond length is 1.35 Å. In the sixteenth C site, C(10) is bonded in a distorted single-bond geometry to one C(12), one C(8), and one N(2) atom. The C(10)-C(12) bond length is 1.49 Å. The C(10)-N(2) bond length is 1.35 Å. In the seventeenth C site, C(11) is bonded in a distorted trigonal non-coplanar geometry to one C(9), one H(6), one H(7), and one H(8) atom. The C(11)-H(6) bond length is 1.10 Å. The C(11)-H(7) bond length is 1.10 Å. The C(11)-H(8) bond length is 1.10 Å. In the eighteenth C site, C(14) is bonded in a distorted trigonal non-coplanar geometry to one C(13), one H(12), one H(13), and one H(14) atom. The C(14)-C(13) bond length is 1.49 Å. The C(14)-H(12) bond length is 1.10 Å. The C(14)-H(13) bond length is 1.10 Å. The C(14)-H(14) bond length is 1.10 Å. In the nineteenth C site, C(12) is bonded in a distorted trigonal non-coplanar geometry to one C(10), one H(10), one H(11), and one H(9) atom. The C(12)-H(10) bond length is 1.10 Å. The C(12)-H(11) bond length is 1.10 Å. The C(12)-H(9) bond length is 1.10 Å. In the twentieth C site, C(13) is bonded in a distorted single-bond geometry to one C(14), one C(15), and one N(3) atom. The C(13)-N(3) bond length is 1.35 Å. There are three inequivalent N sites. In the first N site, N(1) is bonded in a 2-coordinate geometry to one C(9), one N(2), and one H(1) atom. The N(1)-N(2) bond length is 1.36 Å. The N(1)-H(1) bond length is 1.06 Å. In the second N site, N(2) is bonded in a distorted trigonal planar geometry to one Zn(1), one C(10), and one N(1) atom. In the third N site, N(3) is bonded in a distorted trigonal planar geometry to one Zn(1), one C(13), and one N(3) atom. The N(3)-N(3) bond length is 1.37 Å. There are sixteen inequivalent H sites. In the first H site, H(15) is bonded in a single-bond geometry to one C(17) atom. In the second H site, H(16) is bonded in a single-bond geometry to one C(18) atom. In the third H site, H(1) is bonded in a distorted linear geometry to one N(1) and one O(2) atom. The H(1)-O(2) bond length is 1.65 Å. In the fourth H site, H(2) is bonded in a single-bond geometry to one C(3) atom. In the fifth H site, H(3) is bonded in a single-bond geometry to one C(4) atom. In the sixth H site, H(4) is bonded in a single-bond geometry to one C(6) atom. In the seventh H site, H(5) is bonded in a single-bond geometry to one C(7) atom. In the eighth H site, H(6) is bonded in a single-bond geometry to one C(11) atom. In the ninth H site, H(7) is bonded in a single-bond geometry to one C(11) atom. In the tenth H site, H(8) is bonded in a single-bond geometry to one C(11) atom. In the eleventh H site, H(9) is bonded in a single-bond geometry to one C(12) atom. In the twelfth H site, H(10) is bonded in a single-bond geometry to one C(12) atom. In the thirteenth H site, H(11) is bonded in a single-bond geometry to one C(12) atom. In the fourteenth H site, H(12) is bonded in a single-bond geometry to one C(14) atom. In the fifteenth H site, H(13) is bonded in a single-bond geometry to one C(14) atom. In the sixteenth H site, H(14) is bonded in a single-bond geometry to one C(14) atom. There are three inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Zn(1) and one C(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one C(1) and one H(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Zn(1) and one C(20) atom. Linkers: 8 Cc1n[nH]c(C)c1-c1ccc(C([O])=O)cc1 ,3 CC1=N[N]C(C)=C1c1ccc(C([O])=O)cc1 ,1 C[C]1N=NC(C)=C1c1ccc(C([O])=O)cc1. Metal clusters: 4 O=[C]O[Zn]1N=N[Zn](O[C]=O)O[C]O1. The MOF has largest included sphere 4.53 A, density 1.15 g/cm3, surface area 5127.14 m2/g, accessible volume 0.43 cm3/g