Cu2C10H3O9 crystallizes in the triclinic P-1 space group. There are four inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(13), one O(3), one O(6), and two equivalent O(18) atoms to form edge-sharing CuO5 square pyramids. The Cu(1)-O(13) bond length is 2.29 Å. The Cu(1)-O(3) bond length is 1.93 Å. The Cu(1)-O(6) bond length is 1.93 Å. There is one shorter (1.94 Å) and one longer (1.97 Å) Cu(1)-O(18) bond length. In the second Cu site, Cu(2) is bonded to one O(1), one O(11), one O(7), and two equivalent O(17) atoms to form edge-sharing CuO5 square pyramids. The Cu(2)-O(1) bond length is 1.91 Å. The Cu(2)-O(11) bond length is 2.32 Å. The Cu(2)-O(7) bond length is 1.95 Å. There is one shorter (1.94 Å) and one longer (1.97 Å) Cu(2)-O(17) bond length. In the third Cu site, Cu(3) is bonded in a distorted hexagonal planar geometry to one O(14), one O(18), one O(4), one O(5), and one O(9) atom. The Cu(3)-O(14) bond length is 2.21 Å. The Cu(3)-O(18) bond length is 1.93 Å. The Cu(3)-O(4) bond length is 2.03 Å. The Cu(3)-O(5) bond length is 2.04 Å. The Cu(3)-O(9) bond length is 1.94 Å. In the fourth Cu site, Cu(4) is bonded in a distorted hexagonal planar geometry to one H(5), one O(12), one O(15), one O(17), one O(2), and one O(8) atom. The Cu(4)-H(5) bond length is 1.89 Å. The Cu(4)-O(12) bond length is 2.21 Å. The Cu(4)-O(15) bond length is 1.92 Å. The Cu(4)-O(17) bond length is 1.92 Å. The Cu(4)-O(2) bond length is 2.04 Å. The Cu(4)-O(8) bond length is 2.09 Å. There are twenty inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one C(2), one C(6), and one C(7) atom. The C(1)-C(2) bond length is 1.40 Å. The C(1)-C(6) bond length is 1.39 Å. The C(1)-C(7) bond length is 1.51 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(8) atom. The C(2)-C(3) bond length is 1.40 Å. The C(2)-C(8) bond length is 1.51 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 1.39 Å. The C(3)-H(1) bond length is 0.93 Å. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one C(3), one C(5), and one C(9) atom. The C(4)-C(5) bond length is 1.40 Å. The C(4)-C(9) bond length is 1.50 Å. In the fifth C site, C(5) is bonded in a trigonal planar geometry to one C(10), one C(4), and one C(6) atom. The C(5)-C(10) bond length is 1.51 Å. The C(5)-C(6) bond length is 1.39 Å. In the sixth C site, C(6) is bonded in a distorted single-bond geometry to one C(1), one C(5), and one H(2) atom. The C(6)-H(2) bond length is 0.93 Å. In the seventh C site, C(7) is bonded in a distorted bent 120 degrees geometry to one C(1), one O(1), and one O(2) atom. The C(7)-O(1) bond length is 1.25 Å. The C(7)-O(2) bond length is 1.26 Å. In the eighth C site, C(8) is bonded in a distorted bent 120 degrees geometry to one C(2), one O(3), and one O(4) atom. The C(8)-O(3) bond length is 1.27 Å. The C(8)-O(4) bond length is 1.24 Å. In the ninth C site, C(9) is bonded in a distorted bent 120 degrees geometry to one C(4), one O(5), and one O(6) atom. The C(9)-O(5) bond length is 1.25 Å. The C(9)-O(6) bond length is 1.26 Å. In the tenth C site, C(10) is bonded in a distorted bent 120 degrees geometry to one C(5), one O(7), and one O(8) atom. The C(10)-O(7) bond length is 1.27 Å. The C(10)-O(8) bond length is 1.24 Å. In the eleventh C site, C(11) is bonded in a trigonal planar geometry to one C(12), one C(13), and one C(14) atom. The C(11)-C(12) bond length is 1.41 Å. The C(11)-C(13) bond length is 1.39 Å. The C(11)-C(14) bond length is 1.51 Å. In the twelfth C site, C(12) is bonded in a trigonal planar geometry to one C(11), one C(13), and one C(15) atom. The C(12)-C(13) bond length is 1.39 Å. The C(12)-C(15) bond length is 1.50 Å. In the thirteenth C site, C(13) is bonded in a distorted single-bond geometry to one C(11), one C(12), and one H(3) atom. The C(13)-H(3) bond length is 0.93 Å. In the fourteenth C site, C(14) is bonded in a bent 120 degrees geometry to one C(11), one O(10), and one O(9) atom. The C(14)-O(10) bond length is 1.22 Å. The C(14)-O(9) bond length is 1.29 Å. In the fifteenth C site, C(15) is bonded in a distorted bent 120 degrees geometry to one C(12), one O(11), and one O(12) atom. The C(15)-O(11) bond length is 1.24 Å. The C(15)-O(12) bond length is 1.28 Å. In the sixteenth C site, C(16) is bonded in a trigonal planar geometry to one C(17), one C(18), and one C(19) atom. The C(16)-C(17) bond length is 1.41 Å. The C(16)-C(18) bond length is 1.39 Å. The C(16)-C(19) bond length is 1.51 Å. In the seventeenth C site, C(17) is bonded in a trigonal planar geometry to one C(16), one C(18), and one C(20) atom. The C(17)-C(18) bond length is 1.39 Å. The C(17)-C(20) bond length is 1.49 Å. In the eighteenth C site, C(18) is bonded in a distorted single-bond geometry to one C(16), one C(17), and one H(4) atom. The C(18)-H(4) bond length is 0.93 Å. In the nineteenth C site, C(19) is bonded in a distorted bent 120 degrees geometry to one C(16), one O(13), and one O(14) atom. The C(19)-O(13) bond length is 1.24 Å. The C(19)-O(14) bond length is 1.27 Å. In the twentieth C site, C(20) is bonded in a bent 120 degrees geometry to one C(17), one O(15), and one O(16) atom. The C(20)-O(15) bond length is 1.29 Å. The C(20)-O(16) bond length is 1.22 Å. There are six 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(6) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(13) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(18) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one Cu(4) and one O(17) atom. The H(5)-O(17) bond length is 0.90 Å. In the sixth H site, H(6) is bonded in a single-bond geometry to one O(18) atom. The H(6)-O(18) bond length is 0.90 Å. There are eighteen inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Cu(2) and one C(7) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Cu(4) and one C(7) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Cu(1) and one C(8) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Cu(3) and one C(8) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Cu(3) and one C(9) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Cu(1) and one C(9) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Cu(2) and one C(10) atom. In the eighth O site, O(8) is bonded in a distorted bent 120 degrees geometry to one Cu(4) and one C(10) atom. In the ninth O site, O(9) is bonded in a bent 120 degrees geometry to one Cu(3) and one C(14) atom. In the tenth O site, O(10) is bonded in a single-bond geometry to one C(14) atom. In the eleventh O site, O(11) is bonded in a bent 120 degrees geometry to one Cu(2) and one C(15) atom. In the twelfth O site, O(12) is bonded in a bent 120 degrees geometry to one Cu(4) and one C(15) atom. In the thirteenth O site, O(13) is bonded in a distorted bent 120 degrees geometry to one Cu(1) and one C(19) atom. In the fourteenth O site, O(14) is bonded in a bent 120 degrees geometry to one Cu(3) and one C(19) atom. In the fifteenth O site, O(15) is bonded in a bent 120 degrees geometry to one Cu(4) and one C(20) atom. In the sixteenth O site, O(16) is bonded in a single-bond geometry to one C(20) atom. In the seventeenth O site, O(17) is bonded in a distorted single-bond geometry to one Cu(4), two equivalent Cu(2), and one H(5) atom. In the eighteenth O site, O(18) is bonded in a distorted single-bond geometry to one Cu(3), two equivalent Cu(1), and one H(6) atom. Linkers: 4 [O]C(=O)c1cc(C([O])=O)c(C([O])=O)cc1C([O])=O. Metal clusters: 1 O=[C]O[Cu](O[C]=O)O[C]=O.O=[C]O[Cu](O[C]=O)O[C]=O.O=[C]O[Cu]O.O=[C]O[Cu]O ,1 O=[C]O[Cu](O)(O[C]=O)O[C]=O.O=[C]O[Cu](O)(O[C]=O)O[C]=O.[Cu].[Cu].[O][C]=O.[O][C]=O. RCSR code: scu. The MOF has largest included sphere 7.37 A, density 1.41 g/cm3, surface area 2887.09 m2/g, accessible volume 0.47 cm3/g