PbC6N2H7O3Br crystallizes in the monoclinic P2_1/c space group. Pb(1) is bonded in a 7-coordinate geometry to one N(1), one O(2), one O(3), two equivalent O(1), and two equivalent Br(1) atoms. The Pb(1)-N(1) bond length is 2.72 Å. The Pb(1)-O(2) bond length is 2.84 Å. The Pb(1)-O(3) bond length is 2.58 Å. There is one shorter (2.55 Å) and one longer (2.59 Å) Pb(1)-O(1) bond length. There is one shorter (2.98 Å) and one longer (3.12 Å) Pb(1)-Br(1) bond length. There are six inequivalent C sites. In the first 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 1.39 Å. The C(1)-C(5) bond length is 1.51 Å. The C(1)-N(1) bond length is 1.35 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one C(1), one N(2), and one H(3) atom. The C(2)-N(2) bond length is 1.34 Å. The C(2)-H(3) bond length is 1.09 Å. In the third C site, C(3) is bonded in a distorted trigonal planar geometry to one C(4), one C(6), and one N(2) atom. The C(3)-C(4) bond length is 1.41 Å. The C(3)-C(6) bond length is 1.49 Å. The C(3)-N(2) bond length is 1.35 Å. In the fourth C site, C(4) is bonded in a distorted trigonal planar geometry to one C(3), one N(1), and one H(4) atom. The C(4)-N(1) bond length is 1.33 Å. The C(4)-H(4) bond length is 1.09 Å. In the fifth 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)-O(1) bond length is 1.29 Å. The C(5)-O(2) bond length is 1.26 Å. In the sixth C site, C(6) is bonded in a distorted trigonal non-coplanar geometry to one C(3), one H(5), one H(6), and one H(7) atom. The C(6)-H(5) bond length is 1.10 Å. The C(6)-H(6) bond length is 1.10 Å. The C(6)-H(7) bond length is 1.10 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a 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(2), one C(3), and one H(1) atom. The N(2)-H(1) bond length is 1.73 Å. There are seven inequivalent H sites. In the first H site, H(1) is bonded in a distorted single-bond geometry to one N(2) and one O(3) atom. The H(1)-O(3) bond length is 1.01 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(3) and one Br(1) atom. The H(2)-O(3) bond length is 0.99 Å. The H(2)-Br(1) bond length is 2.31 Å. In the third H site, H(3) is bonded in a single-bond geometry to one C(2) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(4) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(6) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(6) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(6) atom. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent Pb(1) and one C(5) atom. In the second O site, O(2) is bonded in a single-bond geometry to one Pb(1) and one C(5) atom. In the third O site, O(3) is bonded in a distorted water-like geometry to one Pb(1), one H(1), and one H(2) atom. Br(1) is bonded in a 3-coordinate geometry to two equivalent Pb(1) and one H(2) atom. Linkers: 4 Cc1cnc(C([O])=O)cn1. Metal clusters: 4 [Pb]. The MOF has largest included sphere 1.90 A, density 3.08 g/cm3, surface area 2456.79 m2/g, accessible volume 0.04 cm3/g