ZnC7N4H4O crystallizes in the monoclinic P2_1/c space group. Zn(1) is bonded to one N(2), one N(3), one N(4), and two equivalent O(1) atoms to form edge-sharing ZnN3O2 trigonal bipyramids. The Zn(1)-N(2) bond length is 2.09 Å. The Zn(1)-N(3) bond length is 1.99 Å. The Zn(1)-N(4) bond length is 2.03 Å. There is one shorter (2.01 Å) and one longer (2.20 Å) Zn(1)-O(1) bond length. There are seven inequivalent C sites. In the first C site, C(4) is bonded in a distorted single-bond geometry to one C(3), one C(5), and one H(2) atom. The C(4)-C(3) bond length is 1.39 Å. The C(4)-C(5) bond length is 1.39 Å. The C(4)-H(2) bond length is 1.09 Å. In the second C site, C(5) is bonded in a distorted single-bond geometry to one C(4) and one H(3) atom. The C(5)-H(3) bond length is 1.09 Å. In the third C site, C(6) is bonded in a distorted single-bond geometry to one C(7) and one O(1) atom. The C(6)-C(7) bond length is 1.41 Å. The C(6)-O(1) bond length is 1.33 Å. In the fourth C site, C(7) is bonded in a distorted trigonal planar geometry to one C(6), one N(4), and one H(4) atom. The C(7)-N(4) bond length is 1.34 Å. The C(7)-H(4) bond length is 1.09 Å. In the fifth C site, C(1) is bonded in a linear geometry to one N(1) and one N(2) atom. The C(1)-N(1) bond length is 1.29 Å. The C(1)-N(2) bond length is 1.18 Å. In the sixth C site, C(2) is bonded in a linear geometry to one N(1) and one N(3) atom. The C(2)-N(1) bond length is 1.28 Å. The C(2)-N(3) bond length is 1.18 Å. In the seventh C site, C(3) is bonded in a distorted bent 120 degrees geometry to one C(4), one N(4), and one H(1) atom. The C(3)-N(4) bond length is 1.35 Å. The C(3)-H(1) bond length is 1.09 Å. There are four inequivalent N sites. In the first N site, N(4) is bonded in a trigonal planar geometry to one Zn(1), one C(3), and one C(7) atom. In the second N site, N(1) is bonded in a bent 120 degrees geometry to one C(1) and one C(2) atom. In the third N site, N(2) is bonded in a bent 150 degrees geometry to one Zn(1) and one C(1) atom. In the fourth N site, N(3) is bonded in a bent 150 degrees geometry to one Zn(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(3) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(4) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(5) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(7) atom. O(1) is bonded in a distorted trigonal planar geometry to two equivalent Zn(1) and one C(6) atom. Linkers: 4 [O]c1cccnc1 ,4 N#C[N]C#N. Metal clusters: 4 [Zn]. The MOF has largest included sphere 2.21 A, density 1.82 g/cm3, surface area 4393.69 m2/g, accessible volume 0.14 cm3/g