SrC9NH9SO5 crystallizes in the monoclinic P2_1/c space group. Sr(1) is bonded in a 8-coordinate geometry to one O(4), one O(5), two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. The Sr(1)-O(4) bond length is 2.50 Å. The Sr(1)-O(5) bond length is 2.57 Å. There is one shorter (2.44 Å) and one longer (2.80 Å) Sr(1)-O(1) bond length. There is one shorter (2.60 Å) and one longer (2.73 Å) Sr(1)-O(2) bond length. There is one shorter (2.61 Å) and one longer (2.77 Å) Sr(1)-O(3) bond length. There are nine 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 1.48 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 trigonal planar geometry to one C(1), one C(3), and one S(1) atom. The C(2)-C(3) bond length is 1.39 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), one C(4), and one H(1) atom. The C(3)-C(4) bond length is 1.41 Å. The C(3)-H(1) bond length is 1.09 Å. In the fourth C site, C(4) is bonded in a distorted trigonal planar geometry to one C(3), one C(5), and one H(2) atom. The C(4)-C(5) bond length is 1.39 Å. The C(4)-H(2) bond length is 1.09 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 1.49 Å. The C(5)-S(1) bond length is 1.72 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 1.27 Å. The C(6)-O(4) bond length is 1.27 Å. In the seventh C site, C(7) is bonded in a trigonal planar geometry to one N(1), one H(3), and one O(5) atom. The C(7)-N(1) bond length is 1.34 Å. The C(7)-H(3) bond length is 1.11 Å. The C(7)-O(5) bond length is 1.25 Å. In the eighth C site, C(8) is bonded to one N(1), one H(4), one H(5), and one H(6) atom to form corner-sharing CH3N tetrahedra. The C(8)-N(1) bond length is 1.45 Å. The C(8)-H(4) bond length is 1.10 Å. The C(8)-H(5) bond length is 1.09 Å. The C(8)-H(6) bond length is 1.10 Å. In the ninth C site, C(9) is bonded to one N(1), one H(7), one H(8), and one H(9) atom to form corner-sharing CH3N tetrahedra. The C(9)-N(1) bond length is 1.45 Å. The C(9)-H(7) bond length is 1.10 Å. The C(9)-H(8) bond length is 1.10 Å. The C(9)-H(9) bond length is 1.10 Å. N(1) is bonded in a trigonal planar geometry to one C(7), one C(8), and one C(9) atom. There are nine 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(7) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(8) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(8) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(8) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(9) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one C(9) atom. In the ninth H site, H(9) is bonded in a single-bond geometry to one C(9) atom. S(1) is bonded in an L-shaped geometry to one C(2) and one C(5) atom. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 1-coordinate geometry to two equivalent Sr(1) and one C(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to two equivalent Sr(1) and one C(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to two equivalent Sr(1) and one C(6) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Sr(1) and one C(6) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Sr(1) and one C(7) atom. Linkers: 4 [O]C(=O)c1ccc(C([O])=O)s1. Metal clusters: 4 [Sr]. The MOF has largest included sphere 2.07 A, density 1.89 g/cm3, surface area 3908.74 m2/g, accessible volume 0.13 cm3/g