PbC5N2H4O5 crystallizes in the monoclinic P2_1/c space group. Pb(1) is bonded in a 6-coordinate geometry to one N(1), one O(1), one O(4), one O(5), and two equivalent O(3) atoms. The Pb(1)-N(1) bond length is 2.50 Å. The Pb(1)-O(1) bond length is 2.59 Å. The Pb(1)-O(4) bond length is 2.65 Å. The Pb(1)-O(5) bond length is 2.52 Å. There is one shorter (2.79 Å) and one longer (2.82 Å) Pb(1)-O(3) bond length. There are five inequivalent C sites. In the first C site, C(4) is bonded in a trigonal planar geometry to one N(1), one N(2), and one O(4) atom. The C(4)-N(1) bond length is 1.36 Å. The C(4)-N(2) bond length is 1.39 Å. The C(4)-O(4) bond length is 1.26 Å. In the second C site, C(5) is bonded in a distorted bent 120 degrees geometry to one C(1), one O(1), and one O(2) atom. The C(5)-C(1) bond length is 1.52 Å. The C(5)-O(1) bond length is 1.29 Å. The C(5)-O(2) bond length is 1.26 Å. In the third C site, C(1) is bonded in a distorted trigonal planar geometry to one C(2), one C(5), and one N(1) atom. The C(1)-C(2) bond length is 1.38 Å. The C(1)-N(1) bond length is 1.35 Å. In the fourth C site, C(2) is bonded in a distorted single-bond geometry to one C(1) and one H(4) atom. The C(2)-H(4) bond length is 1.09 Å. In the fifth C site, C(3) is bonded in a distorted bent 120 degrees geometry to one N(2) and one O(3) atom. The C(3)-N(2) bond length is 1.38 Å. The C(3)-O(3) bond length is 1.27 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a distorted bent 120 degrees geometry to one Pb(1), one C(1), and one C(4) atom. In the second N site, N(2) is bonded in a trigonal planar geometry to one C(3), one C(4), and one H(1) atom. The N(2)-H(1) bond length is 1.05 Å. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one N(2) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(5) atom. The H(2)-O(5) bond length is 0.98 Å. In the third H site, H(3) is bonded in a single-bond geometry to one O(5) atom. The H(3)-O(5) bond length is 1.00 Å. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(2) atom. There are five inequivalent O sites. In the first O site, O(5) is bonded in a water-like geometry to one Pb(1), one H(2), and one H(3) atom. In the second O site, O(4) is bonded in a single-bond geometry to one Pb(1) and one C(4) atom. In the third O site, O(1) is bonded in a distorted single-bond geometry to one Pb(1) and one C(5) atom. In the fourth O site, O(2) is bonded in a single-bond geometry to one C(5) atom. In the fifth O site, O(3) is bonded in a single-bond geometry to two equivalent Pb(1) and one C(3) atom. Linkers: 4 [O]C(=O)C1=NC(=O)NC(=O)[CH]1. Metal clusters: 4 [Pb]. The MOF has largest included sphere 1.35 A, density 3.56 g/cm3, surface area 1732.69 m2/g, accessible volume 0.02 cm3/g