PbC20H12(N3O4)2 crystallizes in the triclinic P-1 space group. Pb(1) is bonded in a 6-coordinate geometry to one N(1), one N(2), one O(1), one O(2), one O(7), and one O(8) atom. The Pb(1)-N(1) bond length is 2.74 Å. The Pb(1)-N(2) bond length is 2.74 Å. The Pb(1)-O(1) bond length is 2.56 Å. The Pb(1)-O(2) bond length is 2.56 Å. The Pb(1)-O(7) bond length is 2.61 Å. The Pb(1)-O(8) bond length is 2.61 Å. There are seventeen inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(3), one O(1), and one O(3) atom. The C(1)-C(3) bond length is 1.47 Å. The C(1)-O(1) bond length is 1.29 Å. The C(1)-O(3) bond length is 1.28 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one C(4), one O(2), and one O(4) atom. The C(2)-C(4) bond length is 1.47 Å. The C(2)-O(2) bond length is 1.29 Å. The C(2)-O(4) bond length is 1.28 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one C(1), one C(5), and one N(1) atom. The C(3)-C(5) bond length is 1.43 Å. The C(3)-N(1) bond length is 1.36 Å. In the fourth C site, C(4) is bonded in a distorted single-bond geometry to one C(2), one C(6), and one N(2) atom. The C(4)-C(6) bond length is 1.43 Å. The C(4)-N(2) bond length is 1.36 Å. In the fifth C site, C(5) is bonded in a distorted single-bond geometry to one C(3), one C(7), and one N(3) atom. The C(5)-C(7) bond length is 1.47 Å. The C(5)-N(3) bond length is 1.36 Å. In the sixth C site, C(6) is bonded in a distorted single-bond geometry to one C(4), one C(8), and one N(4) atom. The C(6)-C(8) bond length is 1.47 Å. The C(6)-N(4) bond length is 1.36 Å. In the seventh C site, C(7) is bonded in a distorted bent 120 degrees geometry to one C(5), one O(5), and one O(7) atom. The C(7)-O(5) bond length is 1.32 Å. The C(7)-O(7) bond length is 1.25 Å. In the eighth C site, C(8) is bonded in a distorted bent 120 degrees geometry to one C(6), one O(6), and one O(8) atom. The C(8)-O(6) bond length is 1.32 Å. The C(8)-O(8) bond length is 1.25 Å. In the ninth C site, C(9,10) is bonded in a distorted trigonal planar geometry to one C(11), one N(1), and one N(3) atom. The C(9,10)-C(11) bond length is 1.45 Å. The C(9,10)-N(1) bond length is 1.37 Å. The C(9,10)-N(3) bond length is 1.35 Å. In the tenth C site, C(11) is bonded in a trigonal planar geometry to one C(13,14); one C(19,20); and one C(9,10) atom. The C(11)-C(13,14) bond length is 1.41 Å. The C(11)-C(19,20) bond length is 1.41 Å. In the eleventh C site, C(12) is bonded in a trigonal planar geometry to one C(13,14); one C(19,20); and one C(9,10) atom. The C(12)-C(13,14) bond length is 1.41 Å. The C(12)-C(19,20) bond length is 1.41 Å. The C(12)-C(9,10) bond length is 1.45 Å. In the twelfth C site, C(13,14) is bonded in a distorted single-bond geometry to one C(11), one C(15), and one H(5) atom. The C(13,14)-C(15) bond length is 1.38 Å. The C(13,14)-H(5) bond length is 1.09 Å. In the thirteenth C site, C(15) is bonded in a distorted trigonal planar geometry to one C(13,14); one N(5); and one H(7,8) atom. The C(15)-N(5) bond length is 1.35 Å. The C(15)-H(7,8) bond length is 1.09 Å. In the fourteenth C site, C(16) is bonded in a distorted trigonal planar geometry to one C(13,14); one N(6); and one H(7,8) atom. The C(16)-C(13,14) bond length is 1.38 Å. The C(16)-N(6) bond length is 1.35 Å. The C(16)-H(7,8) bond length is 1.09 Å. In the fifteenth C site, C(17) is bonded in a distorted trigonal planar geometry to one C(19,20); one N(5); and one H(9,10) atom. The C(17)-C(19,20) bond length is 1.38 Å. The C(17)-N(5) bond length is 1.35 Å. The C(17)-H(9,10) bond length is 1.09 Å. In the sixteenth C site, C(18) is bonded in a distorted trigonal planar geometry to one C(19,20); one N(6); and one H(9,10) atom. The C(18)-C(19,20) bond length is 1.38 Å. The C(18)-N(6) bond length is 1.35 Å. The C(18)-H(9,10) bond length is 1.09 Å. In the seventeenth C site, C(19,20) is bonded in a distorted single-bond geometry to one C(11); one C(17); and one H(11,12) atom. The C(19,20)-H(11,12) bond length is 1.08 Å. There are six inequivalent N sites. In the first N site, N(1) is bonded in a water-like geometry to one Pb(1); one C(3); and one C(9,10) atom. In the second N site, N(2) is bonded in a water-like geometry to one Pb(1); one C(4); and one C(9,10) atom. The N(2)-C(9,10) bond length is 1.37 Å. In the third N site, N(3) is bonded in a water-like geometry to one C(5) and one C(9,10) atom. In the fourth N site, N(4) is bonded in a water-like geometry to one C(6) and one C(9,10) atom. The N(4)-C(9,10) bond length is 1.35 Å. In the fifth N site, N(5) is bonded in a trigonal planar geometry to one C(15), one C(17), and one H(3) atom. The N(5)-H(3) bond length is 1.06 Å. In the sixth N site, N(6) is bonded in a trigonal planar geometry to one C(16), one C(18), and one H(4) atom. The N(6)-H(4) bond length is 1.06 Å. There are eight inequivalent H sites. In the first H site, H(1,2) is bonded in a linear geometry to one O(3) and one O(5) atom. The H(1,2)-O(3) bond length is 1.38 Å. The H(1,2)-O(5) bond length is 1.08 Å. In the second H site, H(3) is bonded in a distorted linear geometry to one N(5) and one O(2) atom. The H(3)-O(2) bond length is 1.67 Å. In the third H site, H(4) is bonded in a distorted linear geometry to one N(6) and one O(1) atom. The H(4)-O(1) bond length is 1.67 Å. In the fourth H site, H(5) is bonded in a single-bond geometry to one C(13,14) atom. In the fifth H site, H(6) is bonded in a single-bond geometry to one C(13,14) atom. The H(6)-C(13,14) bond length is 1.09 Å. In the sixth H site, H(7,8) is bonded in a single-bond geometry to one C(15) atom. In the seventh H site, H(9,10) is bonded in a single-bond geometry to one C(17) atom. In the eighth H site, H(11,12) is bonded in a single-bond geometry to one C(19,20) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 1-coordinate geometry to one Pb(1), one C(1), and one H(4) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Pb(1), one C(2), and one H(3) atom. In the third O site, O(3) is bonded in a water-like geometry to one C(1) and one H(1,2) atom. In the fourth O site, O(4) is bonded in a water-like geometry to one C(2) and one H(1,2) atom. The O(4)-H(1,2) bond length is 1.38 Å. In the fifth O site, O(5) is bonded in a water-like geometry to one C(7) and one H(1,2) atom. In the sixth O site, O(6) is bonded in a water-like geometry to one C(8) and one H(1,2) atom. The O(6)-H(1,2) bond length is 1.08 Å. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one Pb(1) and one C(7) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one Pb(1) and one C(8) atom. Linkers: 2 [O]C(=O)[C]1N=C(C2=C[CH]NC=C2)N=C1C(=O)O. Metal clusters: 2 [Pb]. The MOF has largest included sphere 2.29 A, density 2.18 g/cm3, surface area 3080.62 m2/g, accessible volume 0.12 cm3/g