Cu3C5N3H4Cl2 crystallizes in the monoclinic P2_1/m space group. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a distorted rectangular see-saw-like geometry to one C(1), one N(2), and two equivalent Cl(1) atoms. The Cu(1)-C(1) bond length is 1.92 Å. The Cu(1)-N(2) bond length is 2.05 Å. There is one shorter (2.41 Å) and one longer (2.42 Å) Cu(1)-Cl(1) bond length. In the second Cu site, Cu(2) is bonded in a distorted trigonal planar geometry to one N(1) and two equivalent Cl(1) atoms. The Cu(2)-N(1) bond length is 1.85 Å. Both Cu(2)-Cl(1) bond lengths are 2.28 Å. There are three inequivalent C sites. In the first C site, C(1) is bonded in a 3-coordinate geometry to two equivalent Cu(1) and one N(1) atom. The C(1)-N(1) bond length is 1.19 Å. In the second C site, C(2) is bonded in a distorted trigonal planar geometry to one C(3), one N(2), and one H(1) atom. The C(2)-C(3) bond length is 1.39 Å. The C(2)-N(2) bond length is 1.35 Å. The C(2)-H(1) bond length is 1.09 Å. In the third C site, C(3) is bonded in a distorted trigonal planar geometry to one C(2), one N(2), and one H(2) atom. The C(3)-N(2) bond length is 1.35 Å. The C(3)-H(2) bond length is 1.09 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a bent 150 degrees geometry to one Cu(2) and one C(1) atom. In the second N site, N(2) is bonded in a trigonal planar geometry to one Cu(1), one C(2), and one C(3) atom. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(2) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(3) atom. Cl(1) is bonded in a distorted trigonal non-coplanar geometry to one Cu(2) and two equivalent Cu(1) atoms. Linkers: 2 c1cnccn1. Metal clusters: 6 [Cu]. The MOF has largest included sphere 1.42 A, density 2.95 g/cm3, surface area 2651.41 m2/g, accessible volume 0.07 cm3/g