ZnC7N3H4O2CHC3N2H6O crystallizes in the orthorhombic Pnma space group. The structure consists of eight 02329_fluka molecules and eight 2-imidazolidone molecules inside a ZnC7N3H4O2 framework. In the ZnC7N3H4O2 framework, Zn(1) is bonded in a distorted tetrahedral geometry to one N(1), one N(2), one N(3), and one O(1) atom. The Zn(1)-N(1) bond length is 2.00 Å. The Zn(1)-N(2) bond length is 2.00 Å. The Zn(1)-N(3) bond length is 2.01 Å. The Zn(1)-O(1) bond length is 2.04 Å. There are seven inequivalent C sites. In the first C site, C(1) is bonded in a bent 120 degrees geometry to one C(2), one O(1), and one O(2) atom. The C(1)-C(2) bond length is 1.50 Å. The C(1)-O(1) bond length is 1.30 Å. The C(1)-O(2) bond length is 1.26 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one C(1), one C(3), and one C(6) atom. The C(2)-C(3) bond length is 1.43 Å. The C(2)-C(6) bond length is 1.39 Å. In the third C site, C(6) is bonded in a distorted single-bond geometry to one C(2) and one H(3) atom. The C(6)-H(3) bond length is 1.09 Å. In the fourth C site, C(3) is bonded in a trigonal planar geometry to one C(2), one C(3), and one C(4) atom. The C(3)-C(3) bond length is 1.45 Å. The C(3)-C(4) bond length is 1.42 Å. In the fifth C site, C(7) is bonded in a trigonal planar geometry to one N(1), one N(3), and one H(4) atom. The C(7)-N(1) bond length is 1.35 Å. The C(7)-N(3) bond length is 1.33 Å. The C(7)-H(4) bond length is 1.09 Å. In the sixth C site, C(4) is bonded in a distorted single-bond geometry to one C(3) and one H(1) atom. The C(4)-H(1) bond length is 1.09 Å. In the seventh C site, C(8) is bonded in a trigonal planar geometry to one N(1), one N(2), and one H(5) atom. The C(8)-N(1) bond length is 1.35 Å. The C(8)-N(2) bond length is 1.33 Å. The C(8)-H(5) bond length is 1.08 Å. There are three inequivalent N sites. In the first N site, N(2) is bonded in a 3-coordinate geometry to one Zn(1), one C(8), and one N(3) atom. The N(2)-N(3) bond length is 1.37 Å. In the second N site, N(3) is bonded in a 3-coordinate geometry to one Zn(1), one C(7), and one N(2) atom. In the third N site, N(1) is bonded in a trigonal planar geometry to one Zn(1), one C(7), and one C(8) atom. There are four inequivalent H sites. In the first H site, H(4) is bonded in a single-bond geometry to one C(7) atom. In the second H site, H(1) is bonded in a single-bond geometry to one C(4) atom. In the third H site, H(5) is bonded in a single-bond geometry to one C(8) atom. In the fourth H site, H(3) is bonded in a single-bond geometry to one C(6) atom. There are two inequivalent O sites. In the first O site, O(1) is bonded in a water-like geometry to one Zn(1) and one C(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to one C(1) atom. Linkers: 4 [O]C(=O)c1ccc(C([O])=O)c2ccccc12 ,5 C1=NN=C[N]1 ,3 [N]1=CN=NC=1. Metal clusters: 4 O=[C]O[Zn]1=NN=[Zn](O[C]=O)N=N1. The MOF has largest included sphere 2.84 A, density 1.66 g/cm3, surface area 4371.50 m2/g, accessible volume 0.22 cm3/g