ZnC18H12(N7O)2 crystallizes in the orthorhombic Fddd space group. Zn(1) is bonded in an octahedral geometry to four equivalent N(1) and two equivalent O(1) atoms. All Zn(1)-N(1) bond lengths are 2.14 Å. Both Zn(1)-O(1) bond lengths are 2.16 Å. There are five inequivalent C sites. In the first C site, C(4) is bonded in a trigonal planar geometry to one N(2), one N(3), and one N(4) atom. The C(4)-N(2) bond length is 1.42 Å. The C(4)-N(3) bond length is 1.34 Å. The C(4)-N(4) bond length is 1.32 Å. In the second C site, C(1) is bonded in a trigonal planar geometry to one N(1), one N(2), and one H(1) atom. The C(1)-N(1) bond length is 1.32 Å. The C(1)-N(2) bond length is 1.37 Å. The C(1)-H(1) bond length is 1.09 Å. In the third C site, C(5) is bonded in a trigonal planar geometry to two equivalent N(4) and one O(1) atom. Both C(5)-N(4) bond lengths are 1.39 Å. The C(5)-O(1) bond length is 1.26 Å. In the fourth C site, C(2) is bonded in a distorted bent 120 degrees geometry to one C(3), one N(1), and one H(2) atom. The C(2)-C(3) bond length is 1.36 Å. The C(2)-N(1) bond length is 1.39 Å. The C(2)-H(2) bond length is 1.08 Å. In the fifth C site, C(3) is bonded in a distorted trigonal planar geometry to one C(2), one N(2), and one H(3) atom. The C(3)-N(2) bond length is 1.39 Å. The C(3)-H(3) bond length is 1.08 Å. There are four 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(2) atom. In the second N site, N(2) is bonded in a trigonal planar geometry to one C(1), one C(3), and one C(4) atom. In the third N site, N(3) is bonded in a water-like geometry to two equivalent C(4) atoms. In the fourth N site, N(4) is bonded in a bent 120 degrees geometry to one C(4) and one C(5) atom. There are three 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(3) is bonded in a single-bond geometry to one C(3) atom. O(1) is bonded in a linear geometry to one Zn(1) and one C(5) atom. Linkers: 3 O=C1[N]C(=[N]=C([N]1)n1cncc1)n1cncc1 ,1 O=C1N=C(n2ccnc2)[N]C(n2ccnc2)=N1. Metal clusters: 2 [O][Zn][O]. The MOF has largest included sphere 8.51 A, density 0.77 g/cm3, surface area 4403.43 m2/g, accessible volume 0.83 cm3/g