U2C16N2H12O9 crystallizes in the triclinic P-1 space group. There are two inequivalent U sites. In the first U site, U(1) is bonded in a distorted pentagonal planar geometry to one O(1), one O(2), one O(3), one O(4), and one O(8) atom. The U(1)-O(1) bond length is 2.46 Å. The U(1)-O(2) bond length is 2.44 Å. The U(1)-O(3) bond length is 2.34 Å. The U(1)-O(4) bond length is 2.31 Å. The U(1)-O(8) bond length is 2.33 Å. In the second U site, U(2) is bonded in a 5-coordinate geometry to one O(5), one O(6), one O(7), and two equivalent O(9) atoms. The U(2)-O(5) bond length is 2.47 Å. The U(2)-O(6) bond length is 2.44 Å. The U(2)-O(7) bond length is 2.33 Å. Both U(2)-O(9) bond lengths are 2.32 Å. There are sixteen 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 1.49 Å. The C(1)-O(1) bond length is 1.24 Å. The C(1)-O(2) bond length is 1.28 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one C(1), one C(3), and one C(7) atom. The C(2)-C(3) bond length is 1.38 Å. The C(2)-C(7) bond length is 1.41 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 1.38 Å. The C(3)-H(1) bond length is 0.93 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 N(1) atom. The C(4)-C(5) bond length is 1.40 Å. The C(4)-N(1) bond length is 1.38 Å. In the fifth C site, C(5) is bonded in a distorted single-bond geometry to one C(4), one C(6), and one H(2) atom. The C(5)-C(6) bond length is 1.39 Å. The C(5)-H(2) bond length is 0.93 Å. In the sixth C site, C(6) is bonded in a trigonal planar geometry to one C(5), one C(7), and one C(8) atom. The C(6)-C(7) bond length is 1.38 Å. The C(6)-C(8) bond length is 1.56 Å. In the seventh C site, C(7) is bonded in a distorted single-bond geometry to one C(2), one C(6), and one H(3) atom. The C(7)-H(3) bond length is 0.93 Å. In the eighth C site, C(8) is bonded in a distorted bent 120 degrees geometry to one C(6), one O(3), and one O(4) atom. The C(8)-O(3) bond length is 1.21 Å. The C(8)-O(4) bond length is 1.23 Å. In the ninth C site, C(9) is bonded in a distorted bent 120 degrees geometry to one C(10), one O(5), and one O(6) atom. The C(9)-C(10) bond length is 1.48 Å. The C(9)-O(5) bond length is 1.26 Å. The C(9)-O(6) bond length is 1.25 Å. In the tenth C site, C(10) is bonded in a trigonal planar geometry to one C(11), one C(15), and one C(9) atom. The C(10)-C(11) bond length is 1.35 Å. The C(10)-C(15) bond length is 1.38 Å. In the eleventh C site, C(11) is bonded in a distorted single-bond geometry to one C(10), one C(12), and one H(6) atom. The C(11)-C(12) bond length is 1.43 Å. The C(11)-H(6) bond length is 0.93 Å. In the twelfth C site, C(12) is bonded in a distorted trigonal planar geometry to one C(11), one C(13), and one N(2) atom. The C(12)-C(13) bond length is 1.39 Å. The C(12)-N(2) bond length is 1.37 Å. In the thirteenth C site, C(13) is bonded in a distorted single-bond geometry to one C(12), one C(14), and one H(7) atom. The C(13)-C(14) bond length is 1.40 Å. The C(13)-H(7) bond length is 0.93 Å. In the fourteenth C site, C(14) is bonded in a trigonal planar geometry to one C(13), one C(15), and one C(16) atom. The C(14)-C(15) bond length is 1.38 Å. The C(14)-C(16) bond length is 1.51 Å. In the fifteenth C site, C(15) is bonded in a distorted single-bond geometry to one C(10), one C(14), and one H(8) atom. The C(15)-H(8) bond length is 0.93 Å. In the sixteenth C site, C(16) is bonded in a bent 120 degrees geometry to one C(14), one O(7), and one O(8) atom. The C(16)-O(7) bond length is 1.22 Å. The C(16)-O(8) bond length is 1.25 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 H(4), and one H(5) atom. The N(1)-H(4) bond length is 0.86 Å. The N(1)-H(5) bond length is 0.86 Å. In the second N site, N(2) is bonded in a trigonal planar geometry to one C(12) and two equivalent H(9,10) atoms. Both N(2)-H(9,10) bond lengths are 0.86 Å. There are eleven 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(5) 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 N(1) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one N(1) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(11) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(13) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one C(15) atom. In the ninth H site, H(9,10) is bonded in a single-bond geometry to one N(2) atom. In the tenth H site, H(11) is bonded in a single-bond geometry to one O(9) atom. The H(11)-O(9) bond length is 0.79 Å. In the eleventh H site, H(12) is bonded in a single-bond geometry to one O(9) atom. The H(12)-O(9) bond length is 0.80 Å. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one U(1) and one C(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one U(1) and one C(1) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one U(1) and one C(8) atom. In the fourth O site, O(4) is bonded in a distorted linear geometry to one U(1) and one C(8) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one U(2) and one C(9) atom. In the sixth O site, O(6) is bonded in a distorted L-shaped geometry to one U(2) and one C(9) atom. In the seventh O site, O(7) is bonded in a bent 150 degrees geometry to one U(2) and one C(16) atom. In the eighth O site, O(8) is bonded in a distorted linear geometry to one U(1) and one C(16) atom. In the ninth O site, O(9) is bonded in a distorted L-shaped geometry to two equivalent U(2), one H(11), and one H(12) atom. Linkers: 4 Nc1cc(C([O])=O)cc(C([O])=O)c1. Metal clusters: 4 [U]. The MOF has largest included sphere 5.85 A, density 1.91 g/cm3, surface area 2511.33 m2/g, accessible volume 0.25 cm3/g