CuC11N4H9O crystallizes in the monoclinic Cc space group. Cu(1) is bonded in a rectangular see-saw-like geometry to one N(1), one N(2), one N(3), and one N(4) atom. The Cu(1)-N(1) bond length is 2.00 Å. The Cu(1)-N(2) bond length is 2.39 Å. The Cu(1)-N(3) bond length is 1.96 Å. The Cu(1)-N(4) bond length is 1.99 Å. There are eleven inequivalent C sites. In the first C site, C(1) is bonded in a 2-coordinate geometry to one N(1) and one H(1) atom. The C(1)-N(1) bond length is 1.32 Å. The C(1)-H(1) bond length is 0.95 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one N(2) and one H(2) atom. The C(2)-N(2) bond length is 1.33 Å. The C(2)-H(2) bond length is 0.95 Å. In the third C site, C(3) is bonded in a distorted bent 120 degrees geometry to one C(4), one N(2), and one H(3) atom. The C(3)-C(4) bond length is 1.39 Å. The C(3)-N(2) bond length is 1.36 Å. The C(3)-H(3) bond length is 0.95 Å. In the fourth C site, C(4) is bonded in a distorted trigonal planar geometry to one C(3), one C(5), and one N(1) atom. The C(4)-C(5) bond length is 1.50 Å. The C(4)-N(1) bond length is 1.35 Å. In the fifth C site, C(5) is bonded in a distorted bent 120 degrees geometry to one C(4), one N(3), and one O(1) atom. The C(5)-N(3) bond length is 1.33 Å. The C(5)-O(1) bond length is 1.27 Å. In the sixth C site, C(6) is bonded in a 3-coordinate geometry to one C(7); one N(3); and two equivalent H(4,5) atoms. The C(6)-C(7) bond length is 1.52 Å. The C(6)-N(3) bond length is 1.45 Å. Both C(6)-H(4,5) bond lengths are 0.99 Å. In the seventh C site, C(7) is bonded in a trigonal planar geometry to one C(11), one C(6), and one C(8) atom. The C(7)-C(11) bond length is 1.38 Å. The C(7)-C(8) bond length is 1.38 Å. In the eighth C site, C(8) is bonded in a distorted single-bond geometry to one C(7) and one H(6) atom. The C(8)-H(6) bond length is 0.95 Å. In the ninth C site, C(9) is bonded in a distorted bent 120 degrees geometry to one N(4) and one H(7) atom. The C(9)-N(4) bond length is 1.34 Å. The C(9)-H(7) bond length is 0.95 Å. In the tenth C site, C(10) is bonded in a distorted trigonal planar geometry to one C(11), one N(4), and one H(8) atom. The C(10)-C(11) bond length is 1.38 Å. The C(10)-N(4) bond length is 1.34 Å. The C(10)-H(8) bond length is 0.95 Å. In the eleventh C site, C(11) is bonded in a distorted single-bond geometry to one C(10), one C(7), and one H(9) atom. The C(11)-H(9) bond length is 0.95 Å. There are four inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one Cu(1), one C(1), and one C(4) atom. In the second N site, N(2) is bonded in a trigonal planar geometry to one Cu(1), one C(2), and one C(3) atom. In the third N site, N(3) is bonded in a trigonal planar geometry to one Cu(1), one C(5), and one C(6) atom. In the fourth N site, N(4) is bonded in a trigonal planar geometry to one Cu(1), one C(10), and one C(9) atom. There are eight 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(3) atom. In the fourth H site, H(4,5) is bonded in a single-bond geometry to one C(6) atom. In the fifth H site, H(6) is bonded in a single-bond geometry to one C(8) atom. In the sixth H site, H(7) is bonded in a single-bond geometry to one C(9) 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) is bonded in a single-bond geometry to one C(11) atom. O(1) is bonded in a single-bond geometry to one C(5) atom. Linkers: 4 O=C([N]Cc1ccncc1)c1cnccn1. Metal clusters: 4 [Cu]. The MOF has largest included sphere 4.15 A, density 1.24 g/cm3, surface area 4131.11 m2/g, accessible volume 0.35 cm3/g