Cu3C4N8H6Cl crystallizes in the tetragonal I4_1/a space group. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a distorted T-shaped geometry to two equivalent N(2) and one Cl(1) atom. Both Cu(1)-N(2) bond lengths are 1.89 Å. The Cu(1)-Cl(1) bond length is 2.32 Å. In the second Cu site, Cu(2) is bonded to one N(1), one N(3), one N(4), and one Cl(1) atom to form distorted corner-sharing CuN3Cl trigonal pyramids. The Cu(2)-N(1) bond length is 2.01 Å. The Cu(2)-N(3) bond length is 1.94 Å. The Cu(2)-N(4) bond length is 1.95 Å. The Cu(2)-Cl(1) bond length is 2.70 Å. There are two inequivalent C sites. In the first C site, C(1) is bonded in a distorted trigonal non-coplanar geometry to one C(2), one H(1), one H(2), and one H(3) atom. The C(1)-C(2) bond length is 1.48 Å. The C(1)-H(1) bond length is 1.09 Å. The C(1)-H(2) bond length is 1.10 Å. The C(1)-H(3) bond length is 1.10 Å. In the second C site, C(2) is bonded in a distorted trigonal planar geometry to one C(1), one N(1), and one N(4) atom. The C(2)-N(1) bond length is 1.34 Å. The C(2)-N(4) bond length is 1.35 Å. There are four inequivalent N sites. In the first N site, N(4) is bonded in a distorted trigonal planar geometry to one Cu(2), one C(2), and one N(3) atom. The N(4)-N(3) bond length is 1.35 Å. In the second N site, N(1) is bonded in a distorted trigonal planar geometry to one Cu(2), one C(2), and one N(2) atom. The N(1)-N(2) bond length is 1.35 Å. In the third N site, N(2) is bonded in a distorted trigonal planar geometry to one Cu(1), one N(1), and one N(3) atom. The N(2)-N(3) bond length is 1.33 Å. In the fourth N site, N(3) is bonded in a distorted trigonal planar geometry to one Cu(2), one N(2), and one N(4) atom. There are three inequivalent H sites. In the first H site, H(2) is bonded in a single-bond geometry to one C(1) atom. In the second H site, H(3) is bonded in a single-bond geometry to one C(1) atom. In the third H site, H(1) is bonded in a single-bond geometry to one C(1) atom. Cl(1) is bonded in a T-shaped geometry to one Cu(1) and two equivalent Cu(2) atoms. Linkers: 8 CC1=NN=N[N]1. Metal clusters: 12 [Cu]. The MOF has largest included sphere 2.04 A, density 2.67 g/cm3, surface area 2889.77 m2/g, accessible volume 0.08 cm3/g