CoIn2C18H6(O7Br)2 crystallizes in the monoclinic P2_1/c space group. Co(1) is bonded to two equivalent O(2), two equivalent O(6), and two equivalent O(7) atoms to form CoO6 octahedra that share corners with two equivalent In(1)BrO5 octahedra. The corner-sharing octahedral tilt angles are 67°. Both Co(1)-O(2) bond lengths are 2.14 Å. Both Co(1)-O(6) bond lengths are 2.15 Å. Both Co(1)-O(7) bond lengths are 2.00 Å. In(1) is bonded to one O(1), one O(3), one O(4), one O(5), one O(7), and one Br(1) atom to form distorted InBrO5 octahedra that share  a cornercorner with one Co(1)O6 octahedra. The corner-sharing octahedral tilt angles are 67°. The In(1)-O(1) bond length is 2.25 Å. The In(1)-O(3) bond length is 2.18 Å. The In(1)-O(4) bond length is 2.27 Å. The In(1)-O(5) bond length is 2.12 Å. The In(1)-O(7) bond length is 2.07 Å. The In(1)-Br(1) bond length is 2.60 Å. There are nine inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(6), one O(3), and one O(6) atom. The C(1)-C(6) bond length is 1.51 Å. The C(1)-O(3) bond length is 1.26 Å. The C(1)-O(6) bond length is 1.24 Å. In the second C site, C(2) is bonded in a distorted single-bond geometry to one C(6), one C(7), and one H(1) atom. The C(2)-C(6) bond length is 1.40 Å. The C(2)-C(7) bond length is 1.39 Å. The C(2)-H(1) bond length is 0.93 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one C(6), one C(9), and one H(2) atom. The C(3)-C(6) bond length is 1.39 Å. The C(3)-C(9) bond length is 1.38 Å. The C(3)-H(2) bond length is 0.93 Å. In the fourth C site, C(4) is bonded in a bent 120 degrees geometry to one C(9), one O(1), and one O(4) atom. The C(4)-C(9) bond length is 1.50 Å. The C(4)-O(1) bond length is 1.26 Å. The C(4)-O(4) bond length is 1.27 Å. In the fifth C site, C(5) is bonded in a distorted bent 120 degrees geometry to one C(7), one O(2), and one O(5) atom. The C(5)-C(7) bond length is 1.50 Å. The C(5)-O(2) bond length is 1.25 Å. The C(5)-O(5) bond length is 1.27 Å. In the sixth C site, C(6) is bonded in a trigonal planar geometry to one C(1), one C(2), and one C(3) atom. In the seventh C site, C(7) is bonded in a trigonal planar geometry to one C(2), one C(5), and one C(8) atom. 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(3) atom. The C(8)-C(9) bond length is 1.38 Å. The C(8)-H(3) bond length is 0.93 Å. In the ninth C site, C(9) is bonded in a trigonal planar geometry to one C(3), one C(4), and one C(8) atom. There are three inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(2) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(3) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(8) atom. There are seven inequivalent O sites. In the first O site, O(1) is bonded in an L-shaped geometry to one In(1) and one C(4) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Co(1) and one C(5) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one In(1) and one C(1) atom. In the fourth O site, O(4) is bonded in an L-shaped geometry to one In(1) and one C(4) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one In(1) and one C(5) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 degrees geometry to one Co(1) and one C(1) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Co(1) and one In(1) atom. Br(1) is bonded in a single-bond geometry to one In(1) atom. Linkers: 4 [O]C(=O)c1cc(C([O])=O)cc(C([O])=O)c1. Metal clusters: 2 [Br].[Br].[C]1O[In]2O[C]O[Co]34(O1)(O[C]O[In](O[C]O3)O4)O2.[O][C]=O.[O][C]=O. RCSR code: rtl. The MOF has largest included sphere 4.72 A, density 1.58 g/cm3, surface area 2834.24 m2/g, accessible volume 0.28 cm3/g