CuC10N4H14Br crystallizes in the orthorhombic Ima2 space group. Cu(1) is bonded to two equivalent N(1) and two equivalent Br(1) atoms to form distorted corner-sharing CuBr2N2 tetrahedra. Both Cu(1)-N(1) bond lengths are 1.99 Å. There is one shorter (2.50 Å) and one longer (2.78 Å) Cu(1)-Br(1) bond length. There are five inequivalent C sites. In the first C site, C(5) is bonded in a trigonal non-coplanar geometry to one C(2); one H(7); and two equivalent H(5,6) atoms. The C(5)-C(2) bond length is 1.47 Å. The C(5)-H(7) bond length is 0.96 Å. Both C(5)-H(5,6) bond lengths are 0.96 Å. In the second C site, C(1) is bonded in a trigonal planar geometry to one C(1), one C(2), and one C(3) atom. The C(1)-C(1) bond length is 1.48 Å. The C(1)-C(2) bond length is 1.38 Å. The C(1)-C(3) bond length is 1.41 Å. In the third C site, C(2) is bonded in a distorted trigonal planar geometry to one C(1), one C(5), and one N(2) atom. The C(2)-N(2) bond length is 1.34 Å. In the fourth C site, C(3) is bonded in a distorted trigonal planar geometry to one C(1), one C(4), and one N(1) atom. The C(3)-C(4) bond length is 1.48 Å. The C(3)-N(1) bond length is 1.33 Å. In the fifth C site, C(4) is bonded in a trigonal non-coplanar geometry to one C(3); one H(2); and two equivalent H(3,4) atoms. The C(4)-H(2) bond length is 0.96 Å. Both C(4)-H(3,4) bond lengths are 0.96 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a 3-coordinate geometry to one Cu(1), one C(3), and one N(2) atom. The N(1)-N(2) bond length is 1.35 Å. In the second N site, N(2) is bonded in a 2-coordinate geometry to one C(2), one N(1), and one H(1) atom. The N(2)-H(1) bond length is 0.86 Å. There are five inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one N(2) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(4) atom. In the third H site, H(3,4) is bonded in a single-bond geometry to one C(4) atom. In the fourth H site, H(5,6) is bonded in a single-bond geometry to one C(5) atom. In the fifth H site, H(7) is bonded in a single-bond geometry to one C(5) atom. Br(1) is bonded in a bent 120 degrees geometry to two equivalent Cu(1) atoms. Linkers: 2 Cc1n[nH]c(C)c1-c1c(C)n[nH]c1C. Metal clusters: 2 [Cu]. The MOF has largest included sphere 5.26 A, density 1.41 g/cm3, surface area 4321.68 m2/g, accessible volume 0.34 cm3/g