ZnC18N(OCl)4 crystallizes in the tetragonal P4/mbm space group. Zn(1) is bonded in a distorted square pyramidal geometry to one N(1), two equivalent O(1), and two equivalent O(2) atoms. The Zn(1)-N(1) bond length is 2.10 Å. Both Zn(1)-O(1) bond lengths are 2.06 Å. Both Zn(1)-O(2) bond lengths are 1.94 Å. There are eleven inequivalent C sites. In the first C site, C(1) is bonded in a 4-coordinate geometry to one C(1), one C(11), one C(2), and one C(3) atom. The C(1)-C(1) bond length is 1.95 Å. The C(1)-C(11) bond length is 1.60 Å. The C(1)-C(2) bond length is 1.79 Å. The C(1)-C(3) bond length is 1.20 Å. In the second C site, C(2) is bonded in a 3-coordinate geometry to one C(1), one C(11), one C(4), and one Cl(1) atom. The C(2)-C(11) bond length is 1.49 Å. The C(2)-C(4) bond length is 1.26 Å. The C(2)-Cl(1) bond length is 1.87 Å. In the third C site, C(3) is bonded in a 3-coordinate geometry to one C(1), one C(10), and one C(4) atom. The C(3)-C(10) bond length is 1.60 Å. The C(3)-C(4) bond length is 1.70 Å. In the fourth C site, C(4) is bonded in a 5-coordinate geometry to one C(10), one C(2), one C(3), one C(4), and one Cl(2) atom. The C(4)-C(10) bond length is 1.37 Å. The C(4)-C(4) bond length is 1.40 Å. The C(4)-Cl(2) bond length is 1.67 Å. In the fifth C site, C(5) is bonded in a distorted single-bond geometry to one C(6) and one N(1) atom. The C(5)-C(6) bond length is 1.29 Å. The C(5)-N(1) bond length is 1.41 Å. In the sixth C site, C(6) is bonded in a 4-coordinate geometry to one C(5), two equivalent C(6), and one N(1) atom. There is one shorter (1.44 Å) and one longer (1.61 Å) C(6)-C(6) bond length. The C(6)-N(1) bond length is 1.84 Å. In the seventh C site, C(7) is bonded in a single-bond geometry to one N(1) atom. The C(7)-N(1) bond length is 1.60 Å. In the eighth C site, C(8) is bonded in a distorted trigonal planar geometry to one C(11) and two equivalent O(2) atoms. The C(8)-C(11) bond length is 1.36 Å. Both C(8)-O(2) bond lengths are 1.35 Å. In the ninth C site, C(9) is bonded in a distorted bent 120 degrees geometry to one C(10) and two equivalent O(1) atoms. The C(9)-C(10) bond length is 1.35 Å. Both C(9)-O(1) bond lengths are 1.26 Å. In the tenth C site, C(10) is bonded in a 5-coordinate geometry to one C(9), two equivalent C(3), and two equivalent C(4) atoms. In the eleventh C site, C(11) is bonded in a 5-coordinate geometry to one C(8), two equivalent C(1), and two equivalent C(2) atoms. N(1) is bonded in a 5-coordinate geometry to one Zn(1), two equivalent C(5), two equivalent C(6), and two equivalent C(7) atoms. There are two 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(9) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Zn(1) and one C(8) atom. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a single-bond geometry to one C(2) atom. In the second Cl site, Cl(2) is bonded in a single-bond geometry to one C(4) atom. Linkers: 2 [C][C]1[C@]23[C][C@]4(C([O])=O)[C@@]5(Cl)[C@]4(Cl)[C@@]14[C@]2(C([O])=O)[C@]354.[Cl].[Cl] ,2 [C][C@@]12[C]3[C][C@]4(C([O])=O)[C@@]5(Cl)[C@]4(Cl)[C@]14[C@@]35[C@]24C([O])=O.[Cl].[Cl] ,3 [C]12[C]3[C]4[C]1[C@@]15[C@@]62[N@]27[C@@]83[C@@]34[N@]41[C@@]15[C@@]62[C@]78[C@@]341 ,1 [C]12[C]3[C]4[C]1[C@@]15[C@@]62[N@]27[C@@]83[C@@]34[N@@]41[C@@]15[C@@]62[C@]78[C@@]341 ,4 [C][C@@]12[C]3[C][C@]4(C([O])=O)[C@@]5(Cl)[C@]4(Cl)[C@@]34[C@]1(C([O])=O)[C@]254.[Cl].[Cl]. Metal clusters: 4 [C]1O[Zn]23O[C]O[Zn](O1)(O[C]O2)O[C]O3. The MOF has largest included sphere 8.68 A, density 1.44 g/cm3, surface area 2911.42 m2/g, accessible volume 0.37 cm3/g