Cu2C9N6H5O7 crystallizes in the orthorhombic P2_12_12_1 space group. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a distorted octahedral geometry to one N(1), one N(2), one O(1), one O(2), one O(3), and one O(4) atom. The Cu(1)-N(1) bond length is 2.10 Å. The Cu(1)-N(2) bond length is 2.09 Å. The Cu(1)-O(1) bond length is 1.91 Å. The Cu(1)-O(2) bond length is 1.99 Å. The Cu(1)-O(3) bond length is 2.31 Å. The Cu(1)-O(4) bond length is 2.43 Å. In the second Cu site, Cu(2) is bonded in a rectangular see-saw-like geometry to one N(3), one N(4), and two equivalent O(3) atoms. The Cu(2)-N(3) bond length is 1.98 Å. The Cu(2)-N(4) bond length is 2.00 Å. There is one shorter (1.93 Å) and one longer (1.94 Å) Cu(2)-O(3) bond length. There are nine inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one C(2), one C(6), and one C(7) atom. The C(1)-C(2) bond length is 1.40 Å. The C(1)-C(6) bond length is 1.39 Å. The C(1)-C(7) bond length is 1.53 Å. In the second C site, C(2) is bonded in a distorted single-bond geometry to one C(1), one C(3), and one H(3) atom. The C(2)-C(3) bond length is 1.40 Å. The C(2)-H(3) bond length is 0.93 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one C(2), one C(4), and one C(8) atom. The C(3)-C(4) bond length is 1.41 Å. The C(3)-C(8) bond length is 1.50 Å. In the fourth C site, C(4) is bonded in a distorted single-bond geometry to one C(3), one C(5), and one H(4) atom. The C(4)-C(5) bond length is 1.38 Å. The C(4)-H(4) bond length is 0.93 Å. In the fifth C site, C(5) is bonded in a distorted trigonal planar geometry to one C(4), one C(6), and one N(6) atom. The C(5)-C(6) bond length is 1.38 Å. The C(5)-N(6) bond length is 1.49 Å. In the sixth C site, C(6) is bonded in a distorted single-bond geometry to one C(1), one C(5), and one H(5) atom. The C(6)-H(5) bond length is 0.93 Å. In the seventh C site, C(7) is bonded in a distorted bent 120 degrees geometry to one C(1), one O(1), and one O(5) atom. The C(7)-O(1) bond length is 1.26 Å. The C(7)-O(5) bond length is 1.24 Å. In the eighth C site, C(8) is bonded in a distorted bent 120 degrees geometry to one C(3), one O(2), and one O(4) atom. The C(8)-O(2) bond length is 1.29 Å. The C(8)-O(4) bond length is 1.23 Å. In the ninth C site, C(9) is bonded in a trigonal planar geometry to one N(1), one N(2), and one N(5) atom. The C(9)-N(1) bond length is 1.33 Å. The C(9)-N(2) bond length is 1.39 Å. The C(9)-N(5) bond length is 1.35 Å. There are six inequivalent N sites. In the first N site, N(1) is bonded in a 3-coordinate geometry to one Cu(1), one C(9), and one N(4) atom. The N(1)-N(4) bond length is 1.34 Å. In the second N site, N(2) is bonded in a 3-coordinate geometry to one Cu(1), one C(9), and one N(3) atom. The N(2)-N(3) bond length is 1.35 Å. In the third N site, N(3) is bonded in a distorted trigonal planar geometry to one Cu(2), one N(2), and one N(4) atom. The N(3)-N(4) bond length is 1.29 Å. In the fourth N site, N(4) is bonded in a distorted trigonal planar geometry to one Cu(2), one N(1), and one N(3) atom. In the fifth N site, N(5) is bonded in a distorted trigonal planar geometry to one C(9) and two equivalent H(1,2) atoms. Both N(5)-H(1,2) bond lengths are 0.86 Å. In the sixth N site, N(6) is bonded in a trigonal planar geometry to one C(5), one O(6), and one O(7) atom. The N(6)-O(6) bond length is 1.21 Å. The N(6)-O(7) bond length is 1.22 Å. There are four inequivalent H sites. In the first H site, H(1,2) is bonded in a single-bond geometry to one N(5) atom. In the second H site, H(3) is bonded in a single-bond geometry to one C(2) atom. In the third H site, H(4) is bonded in a single-bond geometry to one C(4) atom. In the fourth H site, H(5) is bonded in a single-bond geometry to one C(6) atom. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Cu(1) and one C(7) atom. In the second O site, O(2) is bonded in a water-like geometry to one Cu(1) and one C(8) atom. In the third O site, O(3) is bonded in a trigonal non-coplanar geometry to one Cu(1) and two equivalent Cu(2) atoms. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Cu(1) and one C(8) atom. In the fifth O site, O(5) is bonded in a single-bond geometry to one C(7) atom. In the sixth O site, O(6) is bonded in a single-bond geometry to one N(6) atom. In the seventh O site, O(7) is bonded in a single-bond geometry to one N(6) atom. Linkers: 4 NC1=NN=N[N]1 ,4 [O]C(=O)c1cc(C([O])=O)cc([N+](=O)[O-])c1. Metal clusters: 8 [Cu]. The MOF has largest included sphere 3.83 A, density 1.89 g/cm3, surface area 3234.61 m2/g, accessible volume 0.13 cm3/g