Cd5C8H18Br4(N10O)2 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent Cd sites. In the first Cd site, Cd(1) is bonded to two equivalent N(10), two equivalent N(7), and two equivalent Br(2) atoms to form corner-sharing CdBr2N4 octahedra. The corner-sharing octahedral tilt angles are 95°. Both Cd(1)-N(10) bond lengths are 2.37 Å. Both Cd(1)-N(7) bond lengths are 2.37 Å. Both Cd(1)-Br(2) bond lengths are 2.86 Å. In the second Cd site, Cd(2) is bonded to one N(3), one N(5), one N(8), one O(1), one Br(1), and one Br(2) atom to form distorted CdBr2N3O octahedra that share  a cornercorner with one Cd(1)Br2N4 octahedra,  a cornercorner with one Cd(3)BrN3O2 octahedra, and  an edgeedge with one Cd(3)BrN3O2 octahedra. The corner-sharing octahedral tilt angles range from 57-95°. The Cd(2)-N(3) bond length is 2.31 Å. The Cd(2)-N(5) bond length is 2.51 Å. The Cd(2)-N(8) bond length is 2.31 Å. The Cd(2)-O(1) bond length is 2.31 Å. The Cd(2)-Br(1) bond length is 2.87 Å. The Cd(2)-Br(2) bond length is 2.79 Å. In the third Cd site, Cd(3) is bonded to one N(1), one N(4), one N(9), two equivalent O(1), and one Br(1) atom to form distorted CdBrN3O2 octahedra that share  a cornercorner with one Cd(2)Br2N3O octahedra,  an edgeedge with one Cd(2)Br2N3O octahedra, and  an edgeedge with one Cd(3)BrN3O2 octahedra. The corner-sharing octahedral tilt angles are 57°. The Cd(3)-N(1) bond length is 2.32 Å. The Cd(3)-N(4) bond length is 2.34 Å. The Cd(3)-N(9) bond length is 2.74 Å. There is one shorter (2.31 Å) and one longer (2.34 Å) Cd(3)-O(1) bond length. The Cd(3)-Br(1) bond length is 2.74 Å. There are four inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one N(1), one N(10), and one N(2) atom. The C(1)-N(1) bond length is 1.37 Å. The C(1)-N(10) bond length is 1.34 Å. The C(1)-N(2) bond length is 1.37 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one N(3), one N(4), and one N(5) atom. The C(2)-N(3) bond length is 1.32 Å. The C(2)-N(4) bond length is 1.36 Å. The C(2)-N(5) bond length is 1.39 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one N(4), one N(6), and one N(7) atom. The C(3)-N(4) bond length is 1.37 Å. The C(3)-N(6) bond length is 1.38 Å. The C(3)-N(7) bond length is 1.34 Å. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one N(1), one N(8), and one N(9) atom. The C(4)-N(1) bond length is 1.37 Å. The C(4)-N(8) bond length is 1.33 Å. The C(4)-N(9) bond length is 1.40 Å. There are ten inequivalent N sites. In the first N site, N(1) is bonded in a distorted trigonal planar geometry to one Cd(3), one C(1), and one C(4) atom. In the second N site, N(2) is bonded in a distorted trigonal non-coplanar geometry to one C(1), one H(1), and one H(2) atom. The N(2)-H(1) bond length is 1.02 Å. The N(2)-H(2) bond length is 1.02 Å. In the third N site, N(3) is bonded in a 3-coordinate geometry to one Cd(2), one C(2), and one N(7) atom. The N(3)-N(7) bond length is 1.40 Å. In the fourth N site, N(4) is bonded in a distorted trigonal planar geometry to one Cd(3), one C(2), and one C(3) atom. In the fifth N site, N(5) is bonded in a 3-coordinate geometry to one Cd(2), one C(2), one H(8), and one H(9) atom. The N(5)-H(8) bond length is 1.03 Å. The N(5)-H(9) bond length is 1.02 Å. In the sixth N site, N(6) is bonded in a trigonal non-coplanar geometry to one C(3), one H(4), and one H(5) atom. The N(6)-H(4) bond length is 1.02 Å. The N(6)-H(5) bond length is 1.02 Å. In the seventh N site, N(7) is bonded in a 3-coordinate geometry to one Cd(1), one C(3), and one N(3) atom. In the eighth N site, N(8) is bonded in a 3-coordinate geometry to one Cd(2), one C(4), and one N(10) atom. The N(8)-N(10) bond length is 1.39 Å. In the ninth N site, N(9) is bonded in a distorted trigonal non-coplanar geometry to one Cd(3), one C(4), one H(6), and one H(7) atom. The N(9)-H(6) bond length is 1.03 Å. The N(9)-H(7) bond length is 1.02 Å. In the tenth N site, N(10) is bonded in a distorted trigonal planar geometry to one Cd(1), one C(1), and one N(8) atom. There are nine 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 N(2) atom. In the third H site, H(3) is bonded in a single-bond geometry to one O(1) atom. The H(3)-O(1) bond length is 0.98 Å. In the fourth H site, H(4) is bonded in a single-bond geometry to one N(6) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one N(6) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one N(9) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one N(9) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one N(5) atom. In the ninth H site, H(9) is bonded in a single-bond geometry to one N(5) atom. O(1) is bonded in a distorted single-bond geometry to one Cd(2), two equivalent Cd(3), and one H(3) atom. There are two inequivalent Br sites. In the first Br site, Br(1) is bonded in a 2-coordinate geometry to one Cd(2) and one Cd(3) 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: 6 NC1=NC(N)=N[N]1 ,1 NC1=[N]=C(N=N1)N ,1 NC1=NN=C(N)[N]1. Metal clusters: 10 [Cd]. The MOF has largest included sphere 2.47 A, density 3.21 g/cm3, surface area 2306.80 m2/g, accessible volume 0.06 cm3/g