ScC8H4O5 crystallizes in the triclinic P1 space group. There are four inequivalent Sc sites. In the first Sc site, Sc(1) is bonded to one O(1), one O(10), one O(15), one O(17), one O(19), and one O(6) atom to form corner-sharing ScO6 octahedra. The corner-sharing octahedral tilt angles are 54°. The Sc(1)-O(1) bond length is 2.11 Å. The Sc(1)-O(10) bond length is 2.12 Å. The Sc(1)-O(15) bond length is 2.11 Å. The Sc(1)-O(17) bond length is 2.05 Å. The Sc(1)-O(19) bond length is 2.05 Å. The Sc(1)-O(6) bond length is 2.12 Å. In the second Sc site, Sc(2) is bonded to one O(12), one O(13), one O(18), one O(20), one O(3), and one O(8) atom to form corner-sharing ScO6 octahedra. The corner-sharing octahedral tilt angles are 54°. The Sc(2)-O(12) bond length is 2.12 Å. The Sc(2)-O(13) bond length is 2.11 Å. The Sc(2)-O(18) bond length is 2.05 Å. The Sc(2)-O(20) bond length is 2.05 Å. The Sc(2)-O(3) bond length is 2.11 Å. The Sc(2)-O(8) bond length is 2.12 Å. In the third Sc site, Sc(3) is bonded to one O(11), one O(16), one O(18), one O(19), one O(4), and one O(5) atom to form corner-sharing ScO6 octahedra. The corner-sharing octahedral tilt angles are 54°. The Sc(3)-O(11) bond length is 2.11 Å. The Sc(3)-O(16) bond length is 2.12 Å. The Sc(3)-O(18) bond length is 2.05 Å. The Sc(3)-O(19) bond length is 2.05 Å. The Sc(3)-O(4) bond length is 2.12 Å. The Sc(3)-O(5) bond length is 2.11 Å. In the fourth Sc site, Sc(4) is bonded to one O(14), one O(17), one O(2), one O(20), one O(7), and one O(9) atom to form corner-sharing ScO6 octahedra. The corner-sharing octahedral tilt angles are 54°. The Sc(4)-O(14) bond length is 2.12 Å. The Sc(4)-O(17) bond length is 2.05 Å. The Sc(4)-O(2) bond length is 2.12 Å. The Sc(4)-O(20) bond length is 2.05 Å. The Sc(4)-O(7) bond length is 2.11 Å. The Sc(4)-O(9) bond length is 2.11 Å. There are thirty-two inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(3), one O(1), and one O(2) atom. The C(1)-C(3) bond length is 1.48 Å. The C(1)-O(1) bond length is 1.27 Å. The C(1)-O(2) bond length is 1.27 Å. In the second C site, C(2) is bonded in a distorted single-bond geometry to one C(25); one C(3); and one H(1,4) atom. The C(2)-C(25) bond length is 1.39 Å. The C(2)-C(3) bond length is 1.40 Å. The C(2)-H(1,4) bond length is 0.95 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one C(1), one C(2), and one C(26) atom. The C(3)-C(26) bond length is 1.39 Å. In the fourth C site, C(4) is bonded in a distorted bent 120 degrees geometry to one C(6), one O(3), and one O(4) atom. The C(4)-C(6) bond length is 1.48 Å. The C(4)-O(3) bond length is 1.27 Å. The C(4)-O(4) bond length is 1.27 Å. In the fifth C site, C(5) is bonded in a distorted single-bond geometry to one C(25); one C(6); and one H(2,5,6,8) atom. The C(5)-C(25) bond length is 1.39 Å. The C(5)-C(6) bond length is 1.40 Å. The C(5)-H(2,5,6,8) bond length is 0.95 Å. In the sixth C site, C(6) is bonded in a trigonal planar geometry to one C(26), one C(4), and one C(5) atom. The C(6)-C(26) bond length is 1.39 Å. In the seventh C site, C(7) is bonded in a distorted bent 120 degrees geometry to one C(9), one O(5), and one O(6) atom. The C(7)-C(9) bond length is 1.48 Å. The C(7)-O(5) bond length is 1.27 Å. The C(7)-O(6) bond length is 1.27 Å. In the eighth C site, C(8) is bonded in a distorted single-bond geometry to one C(27); one C(9); and one H(3,7) atom. The C(8)-C(27) bond length is 1.39 Å. The C(8)-C(9) bond length is 1.40 Å. The C(8)-H(3,7) bond length is 0.95 Å. In the ninth C site, C(9) is bonded in a trigonal planar geometry to one C(28), one C(7), and one C(8) atom. The C(9)-C(28) bond length is 1.39 Å. In the tenth C site, C(10) is bonded in a distorted bent 120 degrees geometry to one C(12), one O(7), and one O(8) atom. The C(10)-C(12) bond length is 1.48 Å. The C(10)-O(7) bond length is 1.27 Å. The C(10)-O(8) bond length is 1.27 Å. In the eleventh C site, C(11) is bonded in a distorted single-bond geometry to one C(12); one C(27); and one H(1,4) atom. The C(11)-C(12) bond length is 1.40 Å. The C(11)-C(27) bond length is 1.39 Å. The C(11)-H(1,4) bond length is 0.95 Å. In the twelfth C site, C(12) is bonded in a trigonal planar geometry to one C(10), one C(11), and one C(28) atom. The C(12)-C(28) bond length is 1.39 Å. In the thirteenth C site, C(13) is bonded in a distorted bent 120 degrees geometry to one C(15), one O(10), and one O(9) atom. The C(13)-C(15) bond length is 1.48 Å. The C(13)-O(10) bond length is 1.27 Å. The C(13)-O(9) bond length is 1.27 Å. In the fourteenth C site, C(14) is bonded in a distorted single-bond geometry to one C(15); one C(29); and one H(2,5,6,8) atom. The C(14)-C(15) bond length is 1.40 Å. The C(14)-C(29) bond length is 1.39 Å. The C(14)-H(2,5,6,8) bond length is 0.95 Å. In the fifteenth C site, C(15) is bonded in a trigonal planar geometry to one C(13), one C(14), and one C(30) atom. The C(15)-C(30) bond length is 1.39 Å. In the sixteenth C site, C(16) is bonded in a distorted bent 120 degrees geometry to one C(18), one O(11), and one O(12) atom. The C(16)-C(18) bond length is 1.48 Å. The C(16)-O(11) bond length is 1.27 Å. The C(16)-O(12) bond length is 1.27 Å. In the seventeenth C site, C(17) is bonded in a distorted single-bond geometry to one C(18); one C(29); and one H(2,5,6,8) atom. The C(17)-C(18) bond length is 1.40 Å. The C(17)-C(29) bond length is 1.39 Å. The C(17)-H(2,5,6,8) bond length is 0.95 Å. In the eighteenth C site, C(18) is bonded in a trigonal planar geometry to one C(16), one C(17), and one C(30) atom. The C(18)-C(30) bond length is 1.39 Å. In the nineteenth C site, C(19) is bonded in a distorted bent 120 degrees geometry to one C(21), one O(13), and one O(14) atom. The C(19)-C(21) bond length is 1.48 Å. The C(19)-O(13) bond length is 1.27 Å. The C(19)-O(14) bond length is 1.27 Å. In the twentieth C site, C(20) is bonded in a distorted single-bond geometry to one C(21); one C(31); and one H(3,7) atom. The C(20)-C(21) bond length is 1.40 Å. The C(20)-C(31) bond length is 1.39 Å. The C(20)-H(3,7) bond length is 0.95 Å. In the twenty-first C site, C(21) is bonded in a trigonal planar geometry to one C(19), one C(20), and one C(32) atom. The C(21)-C(32) bond length is 1.39 Å. In the twenty-second C site, C(22) is bonded in a distorted bent 120 degrees geometry to one C(24), one O(15), and one O(16) atom. The C(22)-C(24) bond length is 1.48 Å. The C(22)-O(15) bond length is 1.27 Å. The C(22)-O(16) bond length is 1.27 Å. In the twenty-third C site, C(23) is bonded in a distorted single-bond geometry to one C(24); one C(31); and one H(2,5,6,8) atom. The C(23)-C(24) bond length is 1.40 Å. The C(23)-C(31) bond length is 1.39 Å. The C(23)-H(2,5,6,8) bond length is 0.95 Å. In the twenty-fourth C site, C(24) is bonded in a trigonal planar geometry to one C(22), one C(23), and one C(32) atom. The C(24)-C(32) bond length is 1.39 Å. In the twenty-fifth C site, C(25) is bonded in a trigonal planar geometry to one C(2), one C(31), and one C(5) atom. The C(25)-C(31) bond length is 1.51 Å. In the twenty-sixth C site, C(26) is bonded in a distorted single-bond geometry to one C(3), one C(6), and one H(9) atom. The C(26)-H(9) bond length is 0.95 Å. In the twenty-seventh C site, C(27) is bonded in a trigonal planar geometry to one C(11), one C(29), and one C(8) atom. The C(27)-C(29) bond length is 1.51 Å. In the twenty-eighth C site, C(28) is bonded in a distorted single-bond geometry to one C(12), one C(9), and one H(10) atom. The C(28)-H(10) bond length is 0.95 Å. In the twenty-ninth C site, C(29) is bonded in a trigonal planar geometry to one C(14), one C(17), and one C(27) atom. In the thirtieth C site, C(30) is bonded in a distorted single-bond geometry to one C(15), one C(18), and one H(11) atom. The C(30)-H(11) bond length is 0.95 Å. In the thirty-first C site, C(31) is bonded in a trigonal planar geometry to one C(20), one C(23), and one C(25) atom. In the thirty-second C site, C(32) is bonded in a distorted single-bond geometry to one C(21), one C(24), and one H(12) atom. The C(32)-H(12) bond length is 0.95 Å. There are eleven inequivalent H sites. In the first H site, H(1,4) is bonded in a single-bond geometry to one C(2) atom. In the second H site, H(2,5,6,8) is bonded in a single-bond geometry to one C(5) atom. In the third H site, H(3,7) is bonded in a single-bond geometry to one C(8) atom. In the fourth H site, H(9) is bonded in a single-bond geometry to one C(26) atom. In the fifth H site, H(10) is bonded in a single-bond geometry to one C(28) atom. In the sixth H site, H(11) is bonded in a single-bond geometry to one C(30) atom. In the seventh H site, H(12) is bonded in a single-bond geometry to one C(32) atom. In the eighth H site, H(13) is bonded in a single-bond geometry to one O(19) atom. The H(13)-O(19) bond length is 1.12 Å. In the ninth H site, H(14) is bonded in a single-bond geometry to one O(18) atom. The H(14)-O(18) bond length is 1.00 Å. In the tenth H site, H(15) is bonded in a single-bond geometry to one O(17) atom. The H(15)-O(17) bond length is 1.22 Å. In the eleventh H site, H(16) is bonded in a single-bond geometry to one O(20) atom. The H(16)-O(20) bond length is 1.00 Å. There are twenty inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Sc(1) and one C(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Sc(4) and one C(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Sc(2) and one C(4) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Sc(3) and one C(4) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one Sc(3) and one C(7) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Sc(1) and one C(7) atom. In the seventh O site, O(7) is bonded in a bent 150 degrees geometry to one Sc(4) and one C(10) atom. In the eighth O site, O(8) is bonded in a distorted bent 120 degrees geometry to one Sc(2) and one C(10) atom. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one Sc(4) and one C(13) atom. In the tenth O site, O(10) is bonded in a distorted bent 120 degrees geometry to one Sc(1) and one C(13) atom. In the eleventh O site, O(11) is bonded in a bent 150 degrees geometry to one Sc(3) and one C(16) atom. In the twelfth O site, O(12) is bonded in a distorted bent 120 degrees geometry to one Sc(2) and one C(16) atom. In the thirteenth O site, O(13) is bonded in a bent 150 degrees geometry to one Sc(2) and one C(19) atom. In the fourteenth O site, O(14) is bonded in a distorted bent 120 degrees geometry to one Sc(4) and one C(19) atom. In the fifteenth O site, O(15) is bonded in a bent 150 degrees geometry to one Sc(1) and one C(22) atom. In the sixteenth O site, O(16) is bonded in a distorted bent 120 degrees geometry to one Sc(3) and one C(22) atom. In the seventeenth O site, O(17) is bonded in a distorted trigonal planar geometry to one Sc(1), one Sc(4), and one H(15) atom. In the eighteenth O site, O(18) is bonded in a distorted trigonal non-coplanar geometry to one Sc(2), one Sc(3), and one H(14) atom. In the nineteenth O site, O(19) is bonded in a distorted trigonal planar geometry to one Sc(1), one Sc(3), and one H(13) atom. In the twentieth O site, O(20) is bonded in a distorted trigonal non-coplanar geometry to one Sc(2), one Sc(4), and one H(16) atom. Linkers: 2 [O]C(=O)c1cc(C([O])=O)cc(-c2cc(C([O])=O)cc(C([O])=O)c2)c1. Metal clusters: 4 [Sc]. The MOF has largest included sphere 7.25 A, density 1.03 g/cm3, surface area 3616.87 m2/g, accessible volume 0.55 cm3/g