ZnC11N3H7O2 crystallizes in the trigonal R-3 space group. Zn(1) is bonded in a 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 2.07 Å. The Zn(1)-N(2) bond length is 2.01 Å. The Zn(1)-N(3) bond length is 2.02 Å. The Zn(1)-O(1) bond length is 1.96 Å. There are eleven inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one N(1) and one H(1) atom. The C(1)-N(1) bond length is 1.35 Å. The C(1)-H(1) bond length is 1.09 Å. In the second C site, C(2) is bonded in a distorted single-bond geometry to one C(3) and one H(2) atom. The C(2)-C(3) bond length is 1.41 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(2), one C(4), and one C(6) atom. The C(3)-C(4) bond length is 1.41 Å. The C(3)-C(6) bond length is 1.45 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 H(3) atom. The C(4)-C(5) bond length is 1.39 Å. The C(4)-H(3) bond length is 1.09 Å. In the fifth C site, C(5) is bonded in a distorted bent 120 degrees geometry to one C(4), one N(1), and one H(4) atom. The C(5)-N(1) bond length is 1.35 Å. The C(5)-H(4) bond length is 1.09 Å. In the sixth C site, C(6) is bonded in a trigonal planar geometry to one C(3), one C(7), and one C(8) atom. The C(6)-C(7) bond length is 1.41 Å. The C(6)-C(8) bond length is 1.41 Å. In the seventh C site, C(7) is bonded in a distorted bent 120 degrees geometry to one C(6), one N(3), and one H(5) atom. The C(7)-N(3) bond length is 1.34 Å. The C(7)-H(5) bond length is 1.09 Å. In the eighth C site, C(8) is bonded in a distorted bent 120 degrees geometry to one C(6), one N(2), and one H(6) atom. The C(8)-N(2) bond length is 1.34 Å. The C(8)-H(6) bond length is 1.09 Å. In the ninth C site, C(9) is bonded in a bent 120 degrees geometry to one C(10), one O(1), and one O(2) atom. The C(9)-C(10) bond length is 1.50 Å. The C(9)-O(1) bond length is 1.30 Å. The C(9)-O(2) bond length is 1.26 Å. In the tenth C site, C(10) is bonded in a trigonal planar geometry to one C(9) and two equivalent C(11) atoms. Both C(10)-C(11) bond lengths are 1.40 Å. In the eleventh C site, C(11) is bonded in a distorted single-bond geometry to two equivalent C(10) and one H(7) atom. The C(11)-H(7) bond length is 1.09 Å. There are three inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one Zn(1), one C(1), and one C(5) atom. In the second N site, N(2) is bonded in a distorted trigonal planar 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 third N site, N(3) is bonded in a distorted trigonal planar geometry to one Zn(1), one C(7), and one N(2) atom. There are seven 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. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(7) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(8) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(11) 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(9) atom. In the second O site, O(2) is bonded in a single-bond geometry to one C(9) atom. Linkers: 3 C1=N[N]C=C1c1ccncc1 ,3 [CH]1N=NC=C1c1ccncc1 ,2 [O]C(=O)c1cc(C([O])=O)cc(C([O])=O)c1. Metal clusters: 3 O=[C]O[Zn]1[N][N][Zn](O[C]=O)[N][N]1. The MOF has largest included sphere 9.19 A, density 0.75 g/cm3, surface area 4359.66 m2/g, accessible volume 0.88 cm3/g