CuC15N6H18Cl is Indium-like structured and crystallizes in the trigonal R-3 space group. The structure is zero-dimensional and consists of six CuC15N6H18Cl clusters. Cu(1) is bonded in a distorted tetrahedral geometry to three equivalent N(1) and one Cl(1) atom. All Cu(1)-N(1) bond lengths are 2.02 Å. The Cu(1)-Cl(1) bond length is 2.59 Å. There are five inequivalent C sites. In the first C site, C(4) is bonded in a distorted bent 120 degrees geometry to one C(3), one N(1), and one H(2) atom. The C(4)-C(3) bond length is 1.38 Å. The C(4)-N(1) bond length is 1.38 Å. The C(4)-H(2) bond length is 1.08 Å. In the second C site, C(5) is bonded in a tetrahedral geometry to one N(2), one H(3), one H(4), and one H(5) atom. The C(5)-N(2) bond length is 1.46 Å. The C(5)-H(3) bond length is 1.10 Å. The C(5)-H(4) bond length is 1.09 Å. The C(5)-H(5) bond length is 1.10 Å. In the third C site, C(1) is bonded in a distorted single-bond geometry to one C(2) and one H(6) atom. The C(1)-C(2) bond length is 1.43 Å. The C(1)-H(6) bond length is 1.09 Å. In the fourth C site, C(2) is bonded in a distorted water-like geometry to one C(1), one N(1), and one N(2) atom. The C(2)-N(1) bond length is 1.35 Å. The C(2)-N(2) bond length is 1.38 Å. In the fifth C site, C(3) is bonded in a distorted bent 120 degrees geometry to one C(4), one N(2), and one H(1) atom. The C(3)-N(2) bond length is 1.38 Å. The C(3)-H(1) bond length is 1.09 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a distorted trigonal planar geometry to one Cu(1), one C(2), and one C(4) atom. In the second N site, N(2) is bonded in a trigonal planar geometry to one C(2), one C(3), and one C(5) atom. There are six inequivalent H sites. In the first H site, H(6) is bonded in a single-bond geometry to one C(1) atom. In the second H site, H(1) is bonded in a single-bond geometry to one C(3) atom. In the third H site, H(2) is bonded in a single-bond geometry to one C(4) atom. In the fourth H site, H(3) is bonded in a single-bond geometry to one C(5) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(5) atom. In the sixth H site, H(4) is bonded in a single-bond geometry to one C(5) atom. Cl(1) is bonded in a single-bond geometry to one Cu(1) atom. Linkers: 3 Cn1ccnc1/C=C/c1nccn1C ,6 [CH2]n1ccnc1/C=C/c1nccn1C. Metal clusters: 2 Cl[Cu]. The MOF has largest included sphere 3.37 A, density 1.65 g/cm3, surface area 4376.63 m2/g, accessible volume 0.13 cm3/g