UC5H4(NO2)2 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent U sites. In the first U site, U(1) is bonded in a 4-coordinate geometry to one O(1), one O(4), one O(5), and one O(8) atom. The U(1)-O(1) bond length is 2.40 Å. The U(1)-O(4) bond length is 2.35 Å. The U(1)-O(5) bond length is 2.37 Å. The U(1)-O(8) bond length is 2.40 Å. In the second U site, U(2) is bonded in a 3-coordinate geometry to one O(11), one O(6), and one O(7) atom. The U(2)-O(11) bond length is 2.34 Å. The U(2)-O(6) bond length is 2.40 Å. The U(2)-O(7) bond length is 2.36 Å. In the third U site, U(3) is bonded in a 5-coordinate geometry to one O(10), one O(12), one O(2), one O(3), and one O(9) atom. The U(3)-O(10) bond length is 2.50 Å. The U(3)-O(12) bond length is 2.34 Å. The U(3)-O(2) bond length is 2.31 Å. The U(3)-O(3) bond length is 2.35 Å. The U(3)-O(9) bond length is 2.46 Å. There are fifteen inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one O(1) and one O(2) atom. The C(1)-O(1) bond length is 1.25 Å. The C(1)-O(2) bond length is 1.26 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one O(3) and one O(4) atom. The C(2)-O(3) bond length is 1.25 Å. The C(2)-O(4) bond length is 1.25 Å. In the third C site, C(3) is bonded in a distorted bent 120 degrees geometry to one O(5) and one O(6) atom. The C(3)-O(5) bond length is 1.26 Å. The C(3)-O(6) bond length is 1.25 Å. In the fourth C site, C(4) is bonded in a distorted trigonal planar geometry to one C(10), one O(7), and one O(8) atom. The C(4)-C(10) bond length is 1.47 Å. The C(4)-O(7) bond length is 1.28 Å. The C(4)-O(8) bond length is 1.29 Å. In the fifth C site, C(5) is bonded in a distorted trigonal planar geometry to one C(11), one O(10), and one O(9) atom. The C(5)-C(11) bond length is 1.53 Å. The C(5)-O(10) bond length is 1.26 Å. The C(5)-O(9) bond length is 1.26 Å. In the sixth C site, C(6) is bonded in a distorted trigonal planar geometry to one C(12), one O(11), and one O(12) atom. The C(6)-C(12) bond length is 1.54 Å. The C(6)-O(11) bond length is 1.24 Å. The C(6)-O(12) bond length is 1.22 Å. In the seventh C site, C(7) is bonded in a 3-coordinate geometry to one N(4), one H(1), and one H(2) atom. The C(7)-N(4) bond length is 1.45 Å. The C(7)-H(1) bond length is 0.97 Å. The C(7)-H(2) bond length is 0.97 Å. In the eighth C site, C(8) is bonded in a 3-coordinate geometry to one N(4) and two equivalent H(3,4) atoms. The C(8)-N(4) bond length is 1.46 Å. Both C(8)-H(3,4) bond lengths are 0.97 Å. In the ninth C site, C(9) is bonded in a 3-coordinate geometry to one N(6), one H(5), and one H(6) atom. The C(9)-N(6) bond length is 1.43 Å. The C(9)-H(5) bond length is 0.97 Å. The C(9)-H(6) bond length is 0.97 Å. In the tenth C site, C(10) is bonded in a 3-coordinate geometry to one C(4), one N(6), one H(7), and one H(8) atom. The C(10)-N(6) bond length is 1.46 Å. The C(10)-H(7) bond length is 0.97 Å. The C(10)-H(8) bond length is 0.97 Å. In the eleventh C site, C(11) is bonded in a 3-coordinate geometry to one C(5); one N(5); and two equivalent H(9,10) atoms. The C(11)-N(5) bond length is 1.46 Å. Both C(11)-H(9,10) bond lengths are 0.97 Å. In the twelfth C site, C(12) is bonded in a distorted trigonal non-coplanar geometry to one C(6); one N(5); and two equivalent H(11,12) atoms. The C(12)-N(5) bond length is 1.42 Å. Both C(12)-H(11,12) bond lengths are 0.97 Å. In the thirteenth C site, C(13) is bonded in a trigonal planar geometry to one N(1), one N(3), and one N(5) atom. The C(13)-N(1) bond length is 1.35 Å. The C(13)-N(3) bond length is 1.36 Å. The C(13)-N(5) bond length is 1.35 Å. In the fourteenth C site, C(14) is bonded in a trigonal planar geometry to one N(2), one N(3), and one N(4) atom. The C(14)-N(2) bond length is 1.34 Å. The C(14)-N(3) bond length is 1.33 Å. The C(14)-N(4) bond length is 1.37 Å. In the fifteenth C site, C(15) is bonded in a trigonal planar geometry to one N(1), one N(2), and one N(6) atom. The C(15)-N(1) bond length is 1.32 Å. The C(15)-N(2) bond length is 1.34 Å. The C(15)-N(6) bond length is 1.40 Å. There are six inequivalent N sites. In the first N site, N(1) is bonded in a bent 120 degrees geometry to one C(13) and one C(15) atom. In the second N site, N(2) is bonded in a bent 120 degrees geometry to one C(14) and one C(15) atom. In the third N site, N(3) is bonded in a bent 120 degrees geometry to one C(13) and one C(14) atom. In the fourth N site, N(4) is bonded in a trigonal planar geometry to one C(14), one C(7), and one C(8) atom. In the fifth N site, N(5) is bonded in a trigonal planar geometry to one C(11), one C(12), and one C(13) atom. In the sixth N site, N(6) is bonded in a trigonal planar geometry to one C(10), one C(15), and one C(9) atom. There are nine inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(7) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(7) atom. In the third H site, H(3,4) is bonded in a single-bond geometry to one C(8) atom. In the fourth H site, H(5) is bonded in a single-bond geometry to one C(9) atom. In the fifth H site, H(6) is bonded in a single-bond geometry to one C(9) atom. In the sixth H site, H(7) is bonded in a single-bond geometry to one C(10) atom. In the seventh H site, H(8) is bonded in a single-bond geometry to one C(10) atom. In the eighth H site, H(9,10) is bonded in a single-bond geometry to one C(11) atom. In the ninth H site, H(11,12) is bonded in a single-bond geometry to one C(12) atom. There are twelve 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 bent 150 degrees geometry to one U(3) and one C(1) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one U(3) and one C(2) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one U(1) and one C(2) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one U(1) and one C(3) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 degrees geometry to one U(2) and one C(3) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one U(2) and one C(4) atom. In the eighth O site, O(8) is bonded in a distorted bent 120 degrees geometry to one U(1) and one C(4) atom. In the ninth O site, O(9) is bonded in a distorted single-bond geometry to one U(3) and one C(5) atom. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to one U(3) and one C(5) atom. In the eleventh O site, O(11) is bonded in a distorted bent 150 degrees geometry to one U(2) and one C(6) atom. In the twelfth O site, O(12) is bonded in a bent 150 degrees geometry to one U(3) and one C(6) atom. Linkers: 4 [O]C(=O)CN(C1=NC(=[N]=C([N]1)N(CC(=O)[O])CC(=O)[O])N(CC(=O)[O])CC(=O)[O])CC(=O)[O]. Metal clusters: 12 [U]. The MOF has largest included sphere 4.72 A, density 2.45 g/cm3, surface area 2137.89 m2/g, accessible volume 0.21 cm3/g