PbC7N2H4SO3 crystallizes in the monoclinic P2_1/c space group. Pb(1) is bonded in a 6-coordinate geometry to one N(2), one O(1), two equivalent O(2), and two equivalent O(3) atoms. The Pb(1)-N(2) bond length is 2.48 Å. The Pb(1)-O(1) bond length is 2.61 Å. There is one shorter (2.58 Å) and one longer (2.75 Å) Pb(1)-O(2) bond length. There is one shorter (2.71 Å) and one longer (2.74 Å) Pb(1)-O(3) bond length. There are seven inequivalent C sites. In the first C site, C(4) is bonded in a distorted trigonal planar geometry to one C(3), one N(1), and one H(2) atom. The C(4)-C(3) bond length is 1.38 Å. The C(4)-N(1) bond length is 1.36 Å. The C(4)-H(2) bond length is 1.09 Å. In the second C site, C(5) is bonded in a distorted trigonal planar geometry to one C(6), one N(1), and one H(3) atom. The C(5)-C(6) bond length is 1.38 Å. The C(5)-N(1) bond length is 1.36 Å. The C(5)-H(3) bond length is 1.09 Å. In the third C site, C(6) is bonded in a distorted trigonal planar geometry to one C(2), one C(5), and one H(4) atom. The C(6)-C(2) bond length is 1.40 Å. The C(6)-H(4) bond length is 1.09 Å. In the fourth C site, C(7) is bonded in a distorted single-bond geometry to one N(2) and one S(1) atom. The C(7)-N(2) bond length is 1.19 Å. The C(7)-S(1) bond length is 1.62 Å. In the fifth 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 1.50 Å. The C(1)-O(1) bond length is 1.27 Å. The C(1)-O(2) bond length is 1.29 Å. In the sixth C site, C(2) is bonded in a trigonal planar geometry to one C(1), one C(3), and one C(6) atom. The C(2)-C(3) bond length is 1.40 Å. In the seventh 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)-H(1) bond length is 1.09 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one C(4), one C(5), and one O(3) atom. The N(1)-O(3) bond length is 1.32 Å. In the second N site, N(2) is bonded in a distorted single-bond geometry to one Pb(1) and one C(7) atom. There are four 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(5) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(6) atom. S(1) is bonded in a single-bond geometry to one C(7) atom. There are three inequivalent O sites. In the first O site, O(2) is bonded in a single-bond geometry to two equivalent Pb(1) and one C(1) atom. In the second O site, O(3) is bonded in a distorted single-bond geometry to two equivalent Pb(1) and one N(1) atom. In the third O site, O(1) is bonded in a single-bond geometry to one Pb(1) and one C(1) atom. Linkers: 4 [O]C(=O)c1cc[n+]([O-])cc1. Metal clusters: 4 [Pb]. RCSR code: sra. The MOF has largest included sphere 1.65 A, density 2.98 g/cm3, surface area 2266.45 m2/g, accessible volume 0.04 cm3/g