Cd2C11N3H9O8 crystallizes in the orthorhombic P2_12_12_1 space group. There are two inequivalent Cd sites. In the first Cd site, Cd(1) is bonded to one N(2), one N(3), one O(1), one O(4), one O(7), and one O(8) atom to form corner-sharing CdN2O4 octahedra. The Cd(1)-N(2) bond length is 2.35 Å. The Cd(1)-N(3) bond length is 2.26 Å. The Cd(1)-O(1) bond length is 2.39 Å. The Cd(1)-O(4) bond length is 2.27 Å. The Cd(1)-O(7) bond length is 2.51 Å. The Cd(1)-O(8) bond length is 2.33 Å. In the second Cd site, Cd(2) is bonded to one N(1), one O(1), one O(2), one O(3), one O(5), and one O(6) atom to form distorted corner-sharing CdNO5 pentagonal pyramids. The corner-sharing octahedral tilt angles are 80°. The Cd(2)-N(1) bond length is 2.27 Å. The Cd(2)-O(1) bond length is 2.43 Å. The Cd(2)-O(2) bond length is 2.40 Å. The Cd(2)-O(3) bond length is 2.23 Å. The Cd(2)-O(5) bond length is 2.52 Å. The Cd(2)-O(6) bond length is 2.29 Å. There are eleven inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one N(2), one N(3), and one H(5) atom. The C(1)-N(2) bond length is 1.34 Å. The C(1)-N(3) bond length is 1.36 Å. The C(1)-H(5) bond length is 1.09 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one N(1), one N(3), and one H(6) atom. The C(2)-N(1) bond length is 1.33 Å. The C(2)-N(3) bond length is 1.35 Å. The C(2)-H(6) bond length is 1.09 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one C(4), one C(8), and one C(9) atom. The C(3)-C(4) bond length is 1.41 Å. The C(3)-C(8) bond length is 1.40 Å. The C(3)-C(9) bond length is 1.50 Å. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one C(10), one C(3), and one C(5) atom. The C(4)-C(10) bond length is 1.50 Å. The C(4)-C(5) bond length is 1.39 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(7) atom. The C(5)-C(6) bond length is 1.39 Å. The C(5)-H(7) bond length is 1.09 Å. In the sixth C site, C(6) is bonded in a trigonal planar geometry to one C(11), one C(5), and one C(7) atom. The C(6)-C(11) bond length is 1.49 Å. The C(6)-C(7) bond length is 1.40 Å. In the seventh C site, C(7) is bonded in a distorted single-bond geometry to one C(6) and one H(8) atom. The C(7)-H(8) bond length is 1.09 Å. In the eighth C site, C(8) is bonded in a distorted single-bond geometry to one C(3) and one H(9) atom. The C(8)-H(9) bond length is 1.09 Å. In the ninth C site, C(9) is bonded in a distorted bent 120 degrees geometry to one C(3), one O(1), and one O(2) atom. The C(9)-O(1) bond length is 1.27 Å. The C(9)-O(2) bond length is 1.28 Å. In the tenth C site, C(10) is bonded in a distorted bent 120 degrees geometry to one C(4), one O(3), and one O(4) atom. The C(10)-O(3) bond length is 1.28 Å. The C(10)-O(4) bond length is 1.27 Å. In the eleventh C site, C(11) is bonded in a distorted bent 120 degrees geometry to one C(6), one O(5), and one O(6) atom. The C(11)-O(5) bond length is 1.26 Å. The C(11)-O(6) bond length is 1.30 Å. There are three inequivalent N sites. In the first N site, N(1) is bonded in a distorted trigonal planar geometry to one Cd(2), one C(2), and one N(2) atom. The N(1)-N(2) bond length is 1.37 Å. In the second N site, N(2) is bonded in a 3-coordinate geometry to one Cd(1), one C(1), and one N(1) atom. In the third N site, N(3) is bonded in a distorted trigonal planar geometry to one Cd(1), one C(1), and one C(2) atom. There are nine inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(7) atom. The H(1)-O(7) bond length is 0.97 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(7) atom. The H(2)-O(7) bond length is 0.99 Å. In the third H site, H(3) is bonded in a single-bond geometry to one O(8) atom. The H(3)-O(8) bond length is 0.98 Å. In the fourth H site, H(4) is bonded in a distorted linear geometry to one O(6) and one O(8) atom. The H(4)-O(6) bond length is 1.64 Å. The H(4)-O(8) bond length is 1.00 Å. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(1) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(2) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(5) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one C(7) atom. In the ninth H site, H(9) is bonded in a single-bond geometry to one C(8) atom. There are eight inequivalent O sites. In the first O site, O(8) is bonded in a distorted water-like geometry to one Cd(1), one H(3), and one H(4) atom. In the second O site, O(1) is bonded in a distorted single-bond geometry to one Cd(1), one Cd(2), and one C(9) atom. In the third O site, O(2) is bonded in a distorted single-bond geometry to one Cd(2) and one C(9) atom. In the fourth O site, O(3) is bonded in a bent 120 degrees geometry to one Cd(2) and one C(10) atom. In the fifth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Cd(1) and one C(10) atom. In the sixth O site, O(5) is bonded in a distorted single-bond geometry to one Cd(2) and one C(11) atom. In the seventh O site, O(6) is bonded in a 3-coordinate geometry to one Cd(2), one C(11), and one H(4) atom. In the eighth O site, O(7) is bonded in a water-like geometry to one Cd(1), one H(1), and one H(2) atom. Linkers: 4 [O]C(=O)c1ccc(C([O])=O)c(C([O])=O)c1 ,1 C1=NC=N[N]1 ,3 C1=NN=C[N]1. Metal clusters: 8 [Cd]. The MOF has largest included sphere 2.71 A, density 2.24 g/cm3, surface area 3063.85 m2/g, accessible volume 0.12 cm3/g