CuC8N4H8(O4Cl)2 is Indium-like structured and crystallizes in the monoclinic C2/c space group. The structure is zero-dimensional and consists of four CuC8N4H8(O4Cl)2 clusters. Cu(1) is bonded to two equivalent N(1), two equivalent N(2), and two equivalent O(1) atoms to form CuN4O2 octahedra that share corners with two equivalent Cl(1)O4 tetrahedra. Both Cu(1)-N(1) bond lengths are 2.06 Å. Both Cu(1)-N(2) bond lengths are 2.06 Å. Both Cu(1)-O(1) bond lengths are 2.43 Å. There are four inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one N(1) and one H(1) atom. The C(1)-N(1) bond length is 1.34 Å. The C(1)-H(1) bond length is 1.09 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one N(1) and one H(2) atom. The C(2)-N(1) bond length is 1.34 Å. The C(2)-H(2) bond length is 1.09 Å. In the third C site, C(3) is bonded in a distorted bent 120 degrees geometry to one N(2) and one H(3,4) atom. The C(3)-N(2) bond length is 1.34 Å. The C(3)-H(3,4) bond length is 1.09 Å. In the fourth C site, C(4) is bonded in a distorted bent 120 degrees geometry to one N(2) and one H(3,4) atom. The C(4)-N(2) bond length is 1.34 Å. The C(4)-H(3,4) bond length is 1.09 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one Cu(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 Cu(1), one C(3), and one C(4) 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(3,4) is bonded in a single-bond geometry to one C(3) atom. There are four inequivalent O sites. In the first O site, O(2) is bonded in a single-bond geometry to one Cl(1) atom. The O(2)-Cl(1) bond length is 1.46 Å. In the second O site, O(3) is bonded in a single-bond geometry to one Cl(1) atom. The O(3)-Cl(1) bond length is 1.46 Å. In the third O site, O(4) is bonded in a single-bond geometry to one Cl(1) atom. The O(4)-Cl(1) bond length is 1.45 Å. In the fourth O site, O(1) is bonded in a bent 150 degrees geometry to one Cu(1) and one Cl(1) atom. The O(1)-Cl(1) bond length is 1.48 Å. Cl(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form ClO4 tetrahedra that share  a cornercorner with one Cu(1)N4O2 octahedra. The corner-sharing octahedral tilt angles are 26°. Linkers: 4 c1cnccn1. Metal clusters: 2 [Cu].[O].[O].[O].[O].[O].[O].[O]Cl.[O]Cl. The MOF has largest included sphere 2.61 A, density 2.13 g/cm3, surface area 3002.97 m2/g, accessible volume 0.09 cm3/g