Mg2C14H10S2O9 crystallizes in the triclinic P-1 space group. There are three inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to one O(2), one O(4), one O(5), one O(7), one O(8), and one O(9) atom to form corner-sharing MgO6 octahedra. The corner-sharing octahedral tilt angles are 69°. The Mg(1)-O(2) bond length is 2.07 Å. The Mg(1)-O(4) bond length is 2.02 Å. The Mg(1)-O(5) bond length is 2.00 Å. The Mg(1)-O(7) bond length is 2.11 Å. The Mg(1)-O(8) bond length is 2.18 Å. The Mg(1)-O(9) bond length is 2.09 Å. In the second Mg site, Mg(2) is bonded to two equivalent O(1), two equivalent O(6), and two equivalent O(8) atoms to form corner-sharing MgO6 octahedra. The corner-sharing octahedral tilt angles are 69°. Both Mg(2)-O(1) bond lengths are 2.09 Å. Both Mg(2)-O(6) bond lengths are 2.06 Å. Both Mg(2)-O(8) bond lengths are 2.13 Å. In the third Mg site, Mg(3) is bonded in a linear geometry to two equivalent O(3) atoms. Both Mg(3)-O(3) bond lengths are 2.01 Å. There are fourteen inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(2), one O(1), and one O(2) atom. The C(1)-C(2) bond length is 1.49 Å. The C(1)-O(1) bond length is 1.26 Å. The C(1)-O(2) bond length is 1.26 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one C(1), one C(3), and one S(1) atom. The C(2)-C(3) bond length is 1.37 Å. The C(2)-S(1) bond length is 1.72 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one C(2) and one H(1) atom. The C(3)-H(1) bond length is 0.93 Å. In the fourth C site, C(4) is bonded in a distorted single-bond geometry to one C(5) and one H(2) atom. The C(4)-C(5) bond length is 1.36 Å. The C(4)-H(2) bond length is 0.93 Å. In the fifth C site, C(5) is bonded in a trigonal planar geometry to one C(4), one C(6), and one S(1) atom. The C(5)-C(6) bond length is 1.48 Å. The C(5)-S(1) bond length is 1.71 Å. In the sixth C site, C(6) is bonded in a distorted bent 120 degrees geometry to one C(5), one O(3), and one O(4) atom. The C(6)-O(3) bond length is 1.25 Å. The C(6)-O(4) bond length is 1.26 Å. In the seventh C site, C(7) is bonded in a distorted bent 120 degrees geometry to one C(8), one O(5), and one O(6) atom. The C(7)-C(8) bond length is 1.49 Å. The C(7)-O(5) bond length is 1.26 Å. The C(7)-O(6) bond length is 1.25 Å. In the eighth C site, C(8) is bonded in a trigonal planar geometry to one C(7), one C(9), and one S(2) atom. The C(8)-C(9) bond length is 1.37 Å. The C(8)-S(2) bond length is 1.71 Å. In the ninth C site, C(9) is bonded in a distorted single-bond geometry to one C(8) and one H(3) atom. The C(9)-H(3) bond length is 0.93 Å. In the tenth C site, C(10) is bonded in a distorted single-bond geometry to one C(11) and one H(4) atom. The C(10)-C(11) bond length is 1.36 Å. The C(10)-H(4) bond length is 0.93 Å. In the eleventh C site, C(11) is bonded in a trigonal planar geometry to one C(10), one C(12), and one S(2) atom. The C(11)-C(12) bond length is 1.48 Å. The C(11)-S(2) bond length is 1.72 Å. In the twelfth C site, C(12) is bonded in a bent 120 degrees geometry to one C(11), one O(7), and one O(8) atom. The C(12)-O(7) bond length is 1.25 Å. The C(12)-O(8) bond length is 1.27 Å. In the thirteenth C site, C(13) is bonded in a 5-coordinate geometry to two equivalent C(14), one H(6), one H(7), and one O(9) atom. There is one shorter (0.85 Å) and one longer (1.16 Å) C(13)-C(14) bond length. The C(13)-H(6) bond length is 0.97 Å. The C(13)-H(7) bond length is 0.97 Å. The C(13)-O(9) bond length is 1.44 Å. In the fourteenth C site, C(14) is bonded in a 3-coordinate geometry to two equivalent C(13), one H(10), one H(9), and one O(9) atom. The C(14)-H(10) bond length is 0.97 Å. The C(14)-H(9) bond length is 0.97 Å. The C(14)-O(9) bond length is 1.43 Å. There are ten 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(4) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(9) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(10) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one O(9) atom. The H(5)-O(9) bond length is 0.82 Å. In the sixth H site, H(6) is bonded in a distorted single-bond geometry to one C(13) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(13) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one O(9) atom. The H(8)-O(9) bond length is 0.83 Å. In the ninth H site, H(9) is bonded in a distorted single-bond geometry to one C(14) atom. In the tenth H site, H(10) is bonded in a single-bond geometry to one C(14) atom. There are two inequivalent S sites. In the first S site, S(1) is bonded in an L-shaped geometry to one C(2) and one C(5) atom. In the second S site, S(2) is bonded in an L-shaped geometry to one C(11) and one C(8) atom. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Mg(2) and one C(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Mg(1) and one C(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Mg(3) and one C(6) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one Mg(1) and one C(6) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Mg(1) and one C(7) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Mg(2) and one C(7) atom. In the seventh O site, O(7) is bonded in an L-shaped geometry to one Mg(1) and one C(12) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Mg(1), one Mg(2), and one C(12) atom. In the ninth O site, O(9) is bonded in a 5-coordinate geometry to one Mg(1), one C(13), one C(14), one H(5), and one H(8) atom. Linkers: 4 [O]C(=O)c1ccc(C([O])=O)s1 ,1 C1CCC1.O.O. Metal clusters: 4 [Mg]. The MOF has largest included sphere 4.56 A, density 1.23 g/cm3, surface area 3762.61 m2/g, accessible volume 0.29 cm3/g