ZnC8NH9O7 crystallizes in the monoclinic P2_1/c space group. Zn(1) is bonded to one O(3), one O(5), one O(6), one O(7), and two equivalent O(1) atoms to form edge-sharing ZnO6 octahedra. The Zn(1)-O(3) bond length is 2.04 Å. The Zn(1)-O(5) bond length is 2.31 Å. The Zn(1)-O(6) bond length is 2.06 Å. The Zn(1)-O(7) bond length is 2.13 Å. There is one shorter (2.04 Å) and one longer (2.31 Å) Zn(1)-O(1) bond length. There are eight inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(2), one N(1), and one H(5) atom. The C(1)-C(2) bond length is 1.39 Å. The C(1)-N(1) bond length is 1.35 Å. The C(1)-H(5) bond length is 1.09 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 1.39 Å. The C(2)-C(6) bond length is 1.52 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one C(2) and one H(6) atom. The C(3)-H(6) bond length is 1.09 Å. In the fourth C site, C(4) is bonded in a distorted single-bond geometry to one C(5) and one O(1) atom. The C(4)-C(5) bond length is 1.41 Å. The C(4)-O(1) bond length is 1.31 Å. In the fifth C site, C(5) is bonded in a distorted trigonal planar geometry to one C(4), one N(1), and one H(7) atom. The C(5)-N(1) bond length is 1.35 Å. The C(5)-H(7) bond length is 1.09 Å. In the sixth C site, C(6) is bonded in a distorted bent 120 degrees geometry to one C(2), one O(2), and one O(3) atom. The C(6)-O(2) bond length is 1.26 Å. The C(6)-O(3) bond length is 1.28 Å. In the seventh C site, C(7) is bonded in a distorted trigonal non-coplanar geometry to one N(1) and two equivalent H(8,9) atoms. The C(7)-N(1) bond length is 1.47 Å. Both C(7)-H(8,9) bond lengths are 1.10 Å. In the eighth C site, C(8) is bonded in a distorted bent 120 degrees geometry to one O(4) and one O(5) atom. The C(8)-O(4) bond length is 1.27 Å. The C(8)-O(5) bond length is 1.27 Å. N(1) is bonded in a trigonal planar geometry to one C(1), one C(5), and one C(7) atom. There are eight inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(6) atom. The H(1)-O(6) bond length is 1.00 Å. In the second H site, H(2) is bonded in a distorted single-bond geometry to one O(2) and one O(6) atom. The H(2)-O(2) bond length is 1.69 Å. The H(2)-O(6) bond length is 1.00 Å. In the third H site, H(3) is bonded in a single-bond geometry to one O(7) atom. The H(3)-O(7) bond length is 0.99 Å. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(7) atom. The H(4)-O(7) bond length is 1.00 Å. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(1) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(3) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(5) atom. In the eighth H site, H(8,9) is bonded in a single-bond geometry to one C(7) atom. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Zn(1) and one C(4) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one C(6) and one H(2) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Zn(1) and one C(6) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one C(8) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one Zn(1) and one C(8) atom. In the sixth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one Zn(1), one H(1), and one H(2) atom. In the seventh O site, O(7) is bonded in a distorted water-like geometry to one Zn(1), one H(3), and one H(4) atom. Linkers: 3 [O]C(=O)CN1[CH]C(C([O])=O)=CC([O])=C1 ,1 [O]C(=O)CN1[CH]C([O])=CC(C([O])=O)=C1. Metal clusters: 2 O.O.O.O.O=[C]O[Zn]1(O[C]=O)O[Zn](O[C]=O)(O[C]=O)O1. RCSR code: rtl. The MOF has largest included sphere 2.07 A, density 2.04 g/cm3, surface area 3240.89 m2/g, accessible volume 0.08 cm3/g