YC7H2(NO3)2 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent Y sites. In the first Y site, Y(1) is bonded in a 7-coordinate geometry to one N(1), one N(4), one O(1), one O(11), one O(2), one O(3), and one O(5) atom. The Y(1)-N(1) bond length is 2.59 Å. The Y(1)-N(4) bond length is 2.61 Å. The Y(1)-O(1) bond length is 2.35 Å. The Y(1)-O(11) bond length is 2.41 Å. The Y(1)-O(2) bond length is 2.35 Å. The Y(1)-O(3) bond length is 2.38 Å. The Y(1)-O(5) bond length is 2.42 Å. In the second Y site, Y(2) is bonded in a 7-coordinate geometry to one N(3), one N(6), one O(12), one O(17), one O(7), one O(8), and one O(9) atom. The Y(2)-N(3) bond length is 2.56 Å. The Y(2)-N(6) bond length is 2.61 Å. The Y(2)-O(12) bond length is 2.38 Å. The Y(2)-O(17) bond length is 2.40 Å. The Y(2)-O(7) bond length is 2.35 Å. The Y(2)-O(8) bond length is 2.34 Å. The Y(2)-O(9) bond length is 2.39 Å. In the third Y site, Y(3) is bonded in a 7-coordinate geometry to one N(2), one N(5), one O(10), one O(13), one O(15), one O(16), and one O(4) atom. The Y(3)-N(2) bond length is 2.62 Å. The Y(3)-N(5) bond length is 2.57 Å. The Y(3)-O(10) bond length is 2.42 Å. The Y(3)-O(13) bond length is 2.38 Å. The Y(3)-O(15) bond length is 2.35 Å. The Y(3)-O(16) bond length is 2.33 Å. The Y(3)-O(4) bond length is 2.43 Å. There are twenty-one inequivalent C sites. In the first C site, C(1) is bonded in a distorted trigonal planar geometry to one C(3), one C(5), and one N(1) atom. The C(1)-C(3) bond length is 1.39 Å. The C(1)-C(5) bond length is 1.49 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(4), one O(2), and one O(4) atom. The C(2)-C(4) bond length is 1.51 Å. The C(2)-O(2) bond length is 1.25 Å. The C(2)-O(4) bond length is 1.24 Å. In the third C site, C(3) is bonded in a single-bond geometry to one C(1), 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(2), one C(3), and one N(2) atom. The C(4)-N(2) bond length is 1.36 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(6) atom. The C(5)-O(1) bond length is 1.26 Å. The C(5)-O(6) bond length is 1.25 Å. In the sixth C site, C(6) is bonded in a trigonal planar geometry to one N(1), one N(2), and one H(2) atom. The C(6)-N(1) bond length is 1.35 Å. The C(6)-N(2) bond length is 1.33 Å. The C(6)-H(2) bond length is 0.92 Å. In the seventh C site, C(7) is bonded in a distorted bent 120 degrees geometry to one O(3) and one O(5) atom. The C(7)-O(3) bond length is 1.24 Å. The C(7)-O(5) bond length is 1.25 Å. In the eighth C site, C(8) is bonded in a distorted trigonal planar geometry to one C(10), one C(12), and one N(3) atom. The C(8)-C(10) bond length is 1.39 Å. The C(8)-C(12) bond length is 1.52 Å. The C(8)-N(3) bond length is 1.34 Å. In the ninth C site, C(9) is bonded in a distorted bent 120 degrees geometry to one C(11), one O(11), and one O(8) atom. The C(9)-C(11) bond length is 1.53 Å. The C(9)-O(11) bond length is 1.24 Å. The C(9)-O(8) bond length is 1.25 Å. In the tenth C site, C(10) is bonded in a distorted single-bond geometry to one C(11), one C(8), and one H(3) atom. The C(10)-C(11) bond length is 1.35 Å. The C(10)-H(3) bond length is 0.87 Å. In the eleventh C site, C(11) is bonded in a distorted trigonal planar geometry to one C(10), one C(9), and one N(4) atom. The C(11)-N(4) bond length is 1.35 Å. In the twelfth C site, C(12) is bonded in a distorted bent 120 degrees geometry to one C(8), one O(14), and one O(7) atom. The C(12)-O(14) bond length is 1.23 Å. The C(12)-O(7) bond length is 1.28 Å. In the thirteenth C site, C(13) is bonded in a trigonal planar geometry to one N(3), one N(4), and one H(4) atom. The C(13)-N(3) bond length is 1.33 Å. The C(13)-N(4) bond length is 1.32 Å. The C(13)-H(4) bond length is 0.87 Å. In the fourteenth C site, C(14) is bonded in a distorted bent 120 degrees geometry to one O(13) and one O(9) atom. The C(14)-O(13) bond length is 1.24 Å. The C(14)-O(9) bond length is 1.27 Å. In the fifteenth C site, C(15) is bonded in a distorted bent 120 degrees geometry to one O(10) and one O(12) atom. The C(15)-O(10) bond length is 1.24 Å. The C(15)-O(12) bond length is 1.26 Å. In the sixteenth C site, C(16) is bonded in a distorted trigonal planar geometry to one C(18), one C(20), and one N(5) atom. The C(16)-C(18) bond length is 1.40 Å. The C(16)-C(20) bond length is 1.49 Å. The C(16)-N(5) bond length is 1.33 Å. In the seventeenth C site, C(17) is bonded in a distorted bent 120 degrees geometry to one C(19), one O(16), and one O(17) atom. The C(17)-C(19) bond length is 1.52 Å. The C(17)-O(16) bond length is 1.26 Å. The C(17)-O(17) bond length is 1.24 Å. In the eighteenth C site, C(18) is bonded in a distorted single-bond geometry to one C(16), one C(19), and one H(5) atom. The C(18)-C(19) bond length is 1.37 Å. The C(18)-H(5) bond length is 1.05 Å. In the nineteenth C site, C(19) is bonded in a distorted trigonal planar geometry to one C(17), one C(18), and one N(6) atom. The C(19)-N(6) bond length is 1.35 Å. In the twentieth C site, C(20) is bonded in a distorted bent 120 degrees geometry to one C(16), one O(15), and one O(18) atom. The C(20)-O(15) bond length is 1.27 Å. The C(20)-O(18) bond length is 1.26 Å. In the twenty-first C site, C(21) is bonded in a trigonal planar geometry to one N(5), one N(6), and one H(6) atom. The C(21)-N(5) bond length is 1.34 Å. The C(21)-N(6) bond length is 1.31 Å. The C(21)-H(6) bond length is 0.94 Å. There are six inequivalent N sites. In the first N site, N(1) is bonded in a distorted trigonal planar geometry to one Y(1), one C(1), and one C(6) atom. In the second N site, N(2) is bonded in a distorted trigonal planar geometry to one Y(3), one C(4), and one C(6) atom. In the third N site, N(3) is bonded in a distorted trigonal planar geometry to one Y(2), one C(13), and one C(8) atom. In the fourth N site, N(4) is bonded in a distorted trigonal planar geometry to one Y(1), one C(11), and one C(13) atom. In the fifth N site, N(5) is bonded in a distorted trigonal planar geometry to one Y(3), one C(16), and one C(21) atom. In the sixth N site, N(6) is bonded in a distorted trigonal planar geometry to one Y(2), one C(19), and one C(21) atom. There are six 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(6) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(10) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(13) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(18) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(21) atom. There are eighteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Y(1) and one C(5) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Y(1) and one C(2) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Y(1) and one C(7) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Y(3) and one C(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Y(1) and one C(7) atom. In the sixth O site, O(6) is bonded in a single-bond geometry to one C(5) atom. In the seventh O site, O(7) is bonded in a distorted bent 120 degrees geometry to one Y(2) and one C(12) atom. In the eighth O site, O(8) is bonded in a bent 150 degrees geometry to one Y(2) and one C(9) atom. In the ninth O site, O(9) is bonded in a distorted bent 120 degrees geometry to one Y(2) and one C(14) atom. In the tenth O site, O(10) is bonded in a distorted bent 120 degrees geometry to one Y(3) and one C(15) atom. In the eleventh O site, O(11) is bonded in a bent 120 degrees geometry to one Y(1) and one C(9) atom. In the twelfth O site, O(12) is bonded in a distorted bent 120 degrees geometry to one Y(2) and one C(15) atom. In the thirteenth O site, O(13) is bonded in a distorted bent 120 degrees geometry to one Y(3) and one C(14) atom. In the fourteenth O site, O(14) is bonded in a single-bond geometry to one C(12) atom. In the fifteenth O site, O(15) is bonded in a distorted bent 120 degrees geometry to one Y(3) and one C(20) atom. In the sixteenth O site, O(16) is bonded in a bent 150 degrees geometry to one Y(3) and one C(17) atom. In the seventeenth O site, O(17) is bonded in a distorted bent 120 degrees geometry to one Y(2) and one C(17) atom. In the eighteenth O site, O(18) is bonded in a single-bond geometry to one C(20) atom. Linkers: 4 [O]C(=O)[C]1[CH]C(C([O])=O)=NC=N1 ,8 [O]C(=O)c1cc(C([O])=O)ncn1 ,5 [O]C(=O)C([O])=O. Metal clusters: 12 [Y]. The MOF has largest included sphere 4.10 A, density 1.66 g/cm3, surface area 2945.33 m2/g, accessible volume 0.24 cm3/g