BaC10N2H18SO9 crystallizes in the triclinic P-1 space group. Ba(1) is bonded in a 8-coordinate geometry to one N(2), one O(3), one O(4), one O(5), one O(6), one O(7), one O(8), and one O(9) atom. The Ba(1)-N(2) bond length is 3.09 Å. The Ba(1)-O(3) bond length is 2.72 Å. The Ba(1)-O(4) bond length is 2.92 Å. The Ba(1)-O(5) bond length is 2.69 Å. The Ba(1)-O(6) bond length is 2.78 Å. The Ba(1)-O(7) bond length is 2.79 Å. The Ba(1)-O(8) bond length is 2.91 Å. The Ba(1)-O(9) bond length is 2.89 Å. There are ten 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 S(1) atom. The C(1)-C(2) bond length is 1.41 Å. The C(1)-C(6) bond length is 1.39 Å. The C(1)-S(1) bond length is 1.76 Å. In the second C site, C(2) is bonded in a distorted trigonal planar geometry to one C(1), one C(3), and one H(1) atom. The C(2)-C(3) bond length is 1.38 Å. The C(2)-H(1) bond length is 1.09 Å. In the third C site, C(3) is bonded in a distorted trigonal planar geometry to one C(2), one C(4), and one H(2) atom. The C(3)-C(4) bond length is 1.42 Å. The C(3)-H(2) bond length is 1.09 Å. In the fourth C site, C(4) is bonded in a distorted single-bond geometry to one C(3), one C(5), and one O(4) atom. The C(4)-C(5) bond length is 1.44 Å. The C(4)-O(4) bond length is 1.32 Å. In the fifth C site, C(5) is bonded in a trigonal planar geometry to one C(4), one C(6), and one C(7) atom. The C(5)-C(6) bond length is 1.40 Å. The C(5)-C(7) bond length is 1.48 Å. In the sixth C site, C(6) is bonded in a distorted trigonal planar geometry to one C(1), one C(5), and one H(3) atom. The C(6)-H(3) bond length is 1.09 Å. In the seventh C site, C(7) is bonded in a distorted bent 120 degrees geometry to one C(5), one N(1), and one O(5) atom. The C(7)-N(1) bond length is 1.36 Å. The C(7)-O(5) bond length is 1.26 Å. In the eighth C site, C(8) is bonded in a distorted trigonal planar geometry to one C(10), one C(9), and one N(2) atom. The C(8)-C(10) bond length is 1.49 Å. The C(8)-C(9) bond length is 1.50 Å. The C(8)-N(2) bond length is 1.30 Å. In the ninth C site, C(9) is bonded in a distorted trigonal non-coplanar geometry to one C(8), one H(4), one H(5), and one H(6) atom. The C(9)-H(4) bond length is 1.10 Å. The C(9)-H(5) bond length is 1.10 Å. The C(9)-H(6) bond length is 1.10 Å. In the tenth C site, C(10) is bonded in a distorted trigonal non-coplanar geometry to one C(8), one H(7), one H(8), and one H(9) atom. The C(10)-H(7) bond length is 1.09 Å. The C(10)-H(8) bond length is 1.10 Å. The C(10)-H(9) bond length is 1.10 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a 2-coordinate geometry to one C(7) and one H(10) atom. The N(1)-H(10) bond length is 1.05 Å. In the second N site, N(2) is bonded in a distorted single-bond geometry to one Ba(1) and one C(8) atom. There are eighteen 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(6) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(9) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(9) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(9) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(10) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one C(10) atom. In the ninth H site, H(9) is bonded in a single-bond geometry to one C(10) atom. In the tenth H site, H(10) is bonded in a distorted single-bond geometry to one N(1) and one O(4) atom. The H(10)-O(4) bond length is 1.71 Å. In the eleventh H site, H(11) is bonded in a single-bond geometry to one O(6) atom. The H(11)-O(6) bond length is 1.00 Å. In the twelfth H site, H(12) is bonded in a distorted single-bond geometry to one O(4) and one O(6) atom. The H(12)-O(4) bond length is 1.66 Å. The H(12)-O(6) bond length is 1.00 Å. In the thirteenth H site, H(13) is bonded in a single-bond geometry to one O(7) atom. The H(13)-O(7) bond length is 0.99 Å. In the fourteenth H site, H(14) is bonded in a single-bond geometry to one O(7) atom. The H(14)-O(7) bond length is 0.98 Å. In the fifteenth H site, H(15) is bonded in a single-bond geometry to one O(1) and one O(8) atom. The H(15)-O(1) bond length is 1.70 Å. The H(15)-O(8) bond length is 0.99 Å. In the sixteenth H site, H(16) is bonded in a single-bond geometry to one O(8) atom. The H(16)-O(8) bond length is 0.99 Å. In the seventeenth H site, H(17) is bonded in a single-bond geometry to one O(9) atom. The H(17)-O(9) bond length is 1.00 Å. In the eighteenth H site, H(18) is bonded in a single-bond geometry to one O(9) atom. The H(18)-O(9) bond length is 0.97 Å. S(1) is bonded in a distorted trigonal non-coplanar geometry to one C(1), one O(1), one O(2), and one O(3) atom. The S(1)-O(1) bond length is 1.48 Å. The S(1)-O(2) bond length is 1.48 Å. The S(1)-O(3) bond length is 1.46 Å. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one H(15) and one S(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one S(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Ba(1) and one S(1) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Ba(1), one C(4), one H(10), and one H(12) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one Ba(1) and one C(7) atom. In the sixth O site, O(6) is bonded in a water-like geometry to one Ba(1), one H(11), and one H(12) atom. In the seventh O site, O(7) is bonded in a water-like geometry to one Ba(1), one H(13), and one H(14) atom. In the eighth O site, O(8) is bonded in a water-like geometry to one Ba(1), one H(15), and one H(16) atom. In the ninth O site, O(9) is bonded in a water-like geometry to one Ba(1), one H(17), and one H(18) atom. Linkers: 2 CC(C)=NNC(=O)c1cc(S([O])([O])[O])ccc1[O]. Metal clusters: 2 [Ba]. The MOF has largest included sphere 2.57 A, density 1.84 g/cm3, surface area 3586.27 m2/g, accessible volume 0.15 cm3/g