MoCuC5NH4O4 crystallizes in the triclinic P-1 space group. Mo(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form MoO4 tetrahedra that share corners with four equivalent Cu(1)NO4 square pyramids. The Mo(1)-O(1) bond length is 1.81 Å. The Mo(1)-O(2) bond length is 1.87 Å. The Mo(1)-O(3) bond length is 1.75 Å. The Mo(1)-O(4) bond length is 1.73 Å. Cu(1) is bonded to one N(1), one O(1), one O(3), and two equivalent O(2) atoms to form CuNO4 square pyramids that share corners with four equivalent Mo(1)O4 tetrahedra and  an edgeedge with one Cu(1)NO4 square pyramid. The Cu(1)-N(1) bond length is 1.96 Å. The Cu(1)-O(1) bond length is 1.94 Å. The Cu(1)-O(3) bond length is 2.21 Å. Both Cu(1)-O(2) bond lengths are 1.98 Å. There are five inequivalent C sites. In the first C site, C(1) is bonded in a distorted trigonal planar geometry to one C(3), one N(1), and one H(1) atom. The C(1)-C(3) bond length is 1.40 Å. The C(1)-N(1) bond length is 1.34 Å. The C(1)-H(1) bond length is 1.09 Å. In the second C site, C(2) is bonded in a distorted trigonal planar geometry to one C(4), one N(1), and one H(2) atom. The C(2)-C(4) bond length is 1.39 Å. The C(2)-N(1) bond length is 1.35 Å. The C(2)-H(2) bond length is 1.09 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one C(1), one C(3), and one C(5) atom. The C(3)-C(3) bond length is 1.48 Å. The C(3)-C(5) bond length is 1.41 Å. In the fourth C site, C(4) is bonded in a distorted single-bond geometry to one C(2) and one H(3) atom. The C(4)-H(3) bond length is 1.09 Å. In the fifth C site, C(5) is bonded in a distorted single-bond geometry to one C(3) and one H(4) atom. The C(5)-H(4) bond length is 1.09 Å. N(1) is bonded in a trigonal planar geometry to one Cu(1), one C(1), and one C(2) atom. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(2) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(4) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(5) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Mo(1) and one Cu(1) atom. In the second O site, O(2) is bonded in a trigonal non-coplanar geometry to one Mo(1) and two equivalent Cu(1) atoms. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Mo(1) and one Cu(1) atom. In the fourth O site, O(4) is bonded in a single-bond geometry to one Mo(1) atom. Linkers: 1 c1cncc(-c2cccnc2)c1. Metal clusters: 2 [Cu] ,2 [Mo]. The MOF has largest included sphere 1.77 A, density 2.79 g/cm3, surface area 2351.24 m2/g, accessible volume 0.06 cm3/g