Cd3C22H18Br4(N6O)2 crystallizes in the triclinic P-1 space group. There are two inequivalent Cd sites. In the first Cd site, Cd(1) is bonded to two equivalent N(2), two equivalent Br(1), and two equivalent Br(2) atoms to form edge-sharing CdBr4N2 octahedra. Both Cd(1)-N(2) bond lengths are 2.47 Å. Both Cd(1)-Br(1) bond lengths are 2.73 Å. Both Cd(1)-Br(2) bond lengths are 2.84 Å. In the second Cd site, Cd(2) is bonded to one N(1), one N(5), one N(6), one O(1), one Br(1), and one Br(2) atom to form distorted edge-sharing CdBr2N3O octahedra. The Cd(2)-N(1) bond length is 2.41 Å. The Cd(2)-N(5) bond length is 2.37 Å. The Cd(2)-N(6) bond length is 2.34 Å. The Cd(2)-O(1) bond length is 2.37 Å. The Cd(2)-Br(1) bond length is 2.89 Å. The Cd(2)-Br(2) bond length is 2.73 Å. There are eleven inequivalent C sites. In the first C site, C(1) is bonded in a distorted trigonal planar geometry to one C(2), one N(1), and one H(1) atom. The C(1)-C(2) bond length is 1.39 Å. The C(1)-N(1) bond length is 1.33 Å. The C(1)-H(1) bond length is 1.09 Å. In the second C site, C(2) is bonded in a distorted trigonal planar geometry to one C(1), one N(2), and one H(2) atom. The C(2)-N(2) 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 C(4), one N(2), and one H(3) atom. The C(3)-C(4) bond length is 1.41 Å. The C(3)-N(2) bond length is 1.34 Å. The C(3)-H(3) bond length is 1.09 Å. In the fourth C site, C(4) is bonded in a distorted trigonal planar geometry to one C(3), one C(5), and one N(1) atom. The C(4)-C(5) bond length is 1.46 Å. The C(4)-N(1) bond length is 1.35 Å. In the fifth C site, C(5) is bonded in a distorted trigonal planar geometry to one C(4), one N(3), and one N(5) atom. The C(5)-N(3) bond length is 1.35 Å. The C(5)-N(5) bond length is 1.35 Å. In the sixth C site, C(6) is bonded in a distorted trigonal planar geometry to one C(7), one N(4), and one N(5) atom. The C(6)-C(7) bond length is 1.46 Å. The C(6)-N(4) bond length is 1.35 Å. The C(6)-N(5) bond length is 1.36 Å. In the seventh C site, C(7) is bonded in a trigonal planar geometry to one C(11), one C(6), and one C(8) atom. The C(7)-C(11) bond length is 1.40 Å. The C(7)-C(8) bond length is 1.40 Å. In the eighth C site, C(8) is bonded in a distorted single-bond geometry to one C(7), one C(9), and one H(4) atom. The C(8)-C(9) bond length is 1.39 Å. The C(8)-H(4) bond length is 1.09 Å. In the ninth C site, C(9) is bonded in a distorted trigonal planar geometry to one C(8), one N(6), and one H(5) atom. The C(9)-N(6) bond length is 1.35 Å. The C(9)-H(5) bond length is 1.09 Å. In the tenth C site, C(10) is bonded in a distorted bent 120 degrees geometry to one N(6) and one H(6) atom. The C(10)-N(6) bond length is 1.34 Å. The C(10)-H(6) bond length is 1.09 Å. In the eleventh C site, C(11) is bonded in a distorted single-bond geometry to one C(7) and one H(7) atom. The C(11)-H(7) bond length is 1.09 Å. There are six inequivalent N sites. In the first N site, N(1) is bonded in a distorted trigonal planar geometry to one Cd(2), one C(1), and one C(4) atom. In the second N site, N(2) is bonded in a distorted trigonal planar geometry to one Cd(1), one C(2), and one C(3) atom. In the third N site, N(3) is bonded in a 3-coordinate geometry to one C(5), one N(4), and one H(8) atom. The N(3)-N(4) bond length is 1.36 Å. The N(3)-H(8) bond length is 1.79 Å. In the fourth N site, N(4) is bonded in a distorted trigonal planar geometry to one C(6), one N(3), and one H(9) atom. The N(4)-H(9) bond length is 1.75 Å. In the fifth N site, N(5) is bonded in a 3-coordinate geometry to one Cd(2), one C(5), and one C(6) atom. In the sixth N site, N(6) is bonded in a trigonal planar geometry to one Cd(2), one C(10), and one C(9) atom. There are nine 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) is bonded in a single-bond geometry to one C(3) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(8) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(9) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(10) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(11) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one N(3) and one O(1) atom. The H(8)-O(1) bond length is 1.00 Å. In the ninth H site, H(9) is bonded in a single-bond geometry to one N(4) and one O(1) atom. The H(9)-O(1) bond length is 1.01 Å. O(1) is bonded in a distorted water-like geometry to one Cd(2), one H(8), and one H(9) atom. There are two inequivalent Br sites. In the first Br site, Br(1) is bonded in an L-shaped geometry to one Cd(1) and one Cd(2) atom. In the second Br site, Br(2) is bonded in an L-shaped geometry to one Cd(1) and one Cd(2) atom. Linkers: 1 c1cc(C2=NN=C(c3cnccn3)[N]2)ccn1 ,1 n1ccc(cc1)C1=[N]=C(N=N1)c1cnccn1. Metal clusters: 1 Br[Cd].Br[Cd].Br[Cd]Br.O.O. The MOF has largest included sphere 1.83 A, density 2.68 g/cm3, surface area 2776.17 m2/g, accessible volume 0.07 cm3/g