Zn7C21H9(N6O7)2 crystallizes in the cubic P2_13 space group. There are three inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(1), one O(2), one O(3), and one O(6) atom to form distorted corner-sharing ZnO4 tetrahedra. The Zn(1)-O(1) bond length is 1.95 Å. The Zn(1)-O(2) bond length is 1.90 Å. The Zn(1)-O(3) bond length is 1.78 Å. The Zn(1)-O(6) bond length is 1.99 Å. In the second Zn site, Zn(2) is bonded to one N(1), one N(3), one N(4), and one O(5) atom to form corner-sharing ZnN3O tetrahedra. The Zn(2)-N(1) bond length is 2.12 Å. The Zn(2)-N(3) bond length is 2.17 Å. The Zn(2)-N(4) bond length is 1.96 Å. The Zn(2)-O(5) bond length is 1.95 Å. In the third Zn site, Zn(3) is bonded to three equivalent N(2) and one O(5) atom to form corner-sharing ZnN3O trigonal pyramids. All Zn(3)-N(2) bond lengths are 1.98 Å. The Zn(3)-O(5) bond length is 2.00 Å. There are seven inequivalent C sites. In the first C site, C(1) is bonded in a distorted trigonal planar geometry to one C(2), one N(2), and one H(1) atom. The C(1)-C(2) bond length is 1.35 Å. The C(1)-N(2) bond length is 1.40 Å. The C(1)-H(1) bond length is 0.95 Å. In the second C site, C(2) is bonded in a distorted trigonal planar geometry to one C(1), one C(3), and one C(4) atom. The C(2)-C(3) bond length is 1.47 Å. The C(2)-C(4) bond length is 1.36 Å. In the third C site, C(3) is bonded in a water-like geometry to one C(2), one O(1), and one O(2) atom. The C(3)-O(1) bond length is 1.15 Å. The C(3)-O(2) bond length is 1.18 Å. In the fourth C site, C(4) is bonded in a 3-coordinate geometry to one C(2), one N(1), and one H(2) atom. The C(4)-N(1) bond length is 1.43 Å. The C(4)-H(2) bond length is 0.95 Å. In the fifth C site, C(5) is bonded in a distorted bent 120 degrees geometry to one C(6), one N(3), and one H(3) atom. The C(5)-C(6) bond length is 1.30 Å. The C(5)-N(3) bond length is 1.07 Å. The C(5)-H(3) bond length is 0.95 Å. In the sixth C site, C(6) is bonded in a bent 120 degrees geometry to one C(5) and one C(7) atom. The C(6)-C(7) bond length is 1.59 Å. In the seventh C site, C(7) is bonded in a 2-coordinate geometry to one C(6), one O(3), and one O(4) atom. The C(7)-O(3) bond length is 0.86 Å. The C(7)-O(4) bond length is 1.41 Å. There are four inequivalent N sites. In the first N site, N(1) is bonded in a 3-coordinate geometry to one Zn(2), one C(4), and one N(2) atom. The N(1)-N(2) bond length is 1.39 Å. In the second N site, N(2) is bonded in a 3-coordinate geometry to one Zn(3), one C(1), and one N(1) atom. In the third N site, N(3) is bonded in a 2-coordinate geometry to one Zn(2) and one C(5) atom. In the fourth N site, N(4) is bonded in a distorted single-bond geometry to one Zn(2) 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(4) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(5) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Zn(1) and one C(3) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Zn(1) and one C(3) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Zn(1) and one C(7) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one C(7) atom. In the fifth O site, O(5) is bonded in a tetrahedral geometry to one Zn(3) and three equivalent Zn(2) atoms. In the sixth O site, O(6) is bonded in a trigonal non-coplanar geometry to three equivalent Zn(1) atoms. Linkers: 12 [O]C(=O)[C]1[CH][N][N][CH]1 ,12 [N][N][CH][C]C([O])=O. Metal clusters: 4 [O][C]O[Zn]1O[C]O[Zn@@]2(O[C][O])O[C]O[Zn@@](O[C][O])(O[C]O1)O2 ,4 [N]1[N][Zn]2[N][N][Zn@]34[N][N][Zn]1[N][N][Zn@]([N][N]2)(N=N3)O4. The MOF has largest included sphere 10.19 A, density 0.90 g/cm3, surface area 3362.81 m2/g, accessible volume 0.71 cm3/g