CuC10H3(SO2)2 crystallizes in the trigonal P-3m1 space group. Cu(1) is bonded in a distorted square co-planar geometry to two equivalent O(1) and two equivalent O(2) atoms. Both Cu(1)-O(1) bond lengths are 1.95 Å. Both Cu(1)-O(2) bond lengths are 1.96 Å. There are seven inequivalent C sites. In the first C site, C(1) is bonded in a bent 120 degrees geometry to one C(2), one O(1), and one O(2) atom. The C(1)-C(2) bond length is 1.50 Å. The C(1)-O(1) bond length is 1.25 Å. The C(1)-O(2) bond length is 1.27 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one C(1), one C(3), and one C(5) atom. The C(2)-C(3) bond length is 1.39 Å. The C(2)-C(5) bond length is 1.39 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one C(2), one C(4), and one H(1) atom. The C(3)-C(4) bond length is 1.38 Å. The C(3)-H(1) bond length is 0.95 Å. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one C(7) and two equivalent C(3) atoms. The C(4)-C(7) bond length is 1.55 Å. In the fifth C site, C(5) is bonded in a distorted single-bond geometry to two equivalent C(2) and one H(2) atom. The C(5)-H(2) bond length is 0.95 Å. In the sixth C site, C(6) is bonded in a 2-coordinate geometry to two equivalent S(1) atoms. Both C(6)-S(1) bond lengths are 1.94 Å. In the seventh C site, C(7) is bonded in a distorted trigonal non-coplanar geometry to one C(4) and two equivalent S(1) atoms. Both C(7)-S(1) bond lengths are 1.77 Å. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(3) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(5) atom. S(1) is bonded in a 4-coordinate geometry to one C(6), one C(7), and two equivalent S(1) atoms. There is one shorter (2.05 Å) and one longer (2.17 Å) S(1)-S(1) bond length. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Cu(1) and one C(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Cu(1) and one C(1) atom. Linkers: 2 [O]C(=O)c1cc(C([O])=O)cc([C]2[S@]34[C][S@]23[S@]23[C][S@]2([C]3c2cc(C([O])=O)cc(C([O])=O)c2)[S@@]23[C][S@@]2([C]3c2cc(C([O])=O)cc(C([O])=O)c2)[S@]23[C][S@]2([C]3c2cc(C([O])=O)cc(C([O])=O)c2)[S@@]23[C][S@@]2([C]3c2cc(C([O])=O)cc(C([O])=O)c2)[S@]23[C][S@]42[C]3c2cc(C([O])=O)cc(C([O])=O)c2)c1. Metal clusters: 3 [C]1O[Cu]234O[C]O[Cu]2(O1)(O[C]O3)O[C]O4. RCSR code: shp. The MOF has largest included sphere 8.34 A, density 0.96 g/cm3, surface area 3486.01 m2/g, accessible volume 0.62 cm3/g