Zn2C12N11H11O6 crystallizes in the triclinic P-1 space group. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a tetrahedral geometry to one N(1), one N(3), one N(6), and one O(3) atom. The Zn(1)-N(1) bond length is 1.96 Å. The Zn(1)-N(3) bond length is 2.00 Å. The Zn(1)-N(6) bond length is 2.01 Å. The Zn(1)-O(3) bond length is 1.98 Å. In the second Zn site, Zn(2) is bonded in a tetrahedral geometry to one N(2), one N(4), one N(5), and one O(4) atom. The Zn(2)-N(2) bond length is 1.96 Å. The Zn(2)-N(4) bond length is 2.00 Å. The Zn(2)-N(5) bond length is 2.01 Å. The Zn(2)-O(4) bond length is 1.98 Å. There are eleven inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one N(3); one N(5); and one N(7,8) atom. The C(1)-N(3) bond length is 1.34 Å. The C(1)-N(5) bond length is 1.37 Å. The C(1)-N(7,8) bond length is 1.35 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one N(4); one N(6); and one N(7,8) atom. The C(2)-N(4) bond length is 1.34 Å. The C(2)-N(6) bond length is 1.37 Å. The C(2)-N(7,8) bond length is 1.35 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one N(1); one N(5); and one N(9,10) atom. The C(3)-N(1) bond length is 1.33 Å. The C(3)-N(5) bond length is 1.36 Å. The C(3)-N(9,10) bond length is 1.37 Å. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one N(2); one N(6); and one N(9,10) atom. The C(4)-N(2) bond length is 1.33 Å. The C(4)-N(6) bond length is 1.36 Å. The C(4)-N(9,10) bond length is 1.37 Å. In the fifth C site, C(5) is bonded in a trigonal planar geometry to one C(10); one C(11); and one C(7,8) atom. The C(5)-C(10) bond length is 1.40 Å. The C(5)-C(11) bond length is 1.50 Å. The C(5)-C(7,8) bond length is 1.40 Å. In the sixth C site, C(6) is bonded in a trigonal planar geometry to one C(10); one C(12); and one C(7,8) atom. The C(6)-C(10) bond length is 1.40 Å. The C(6)-C(12) bond length is 1.50 Å. The C(6)-C(7,8) bond length is 1.39 Å. In the seventh C site, C(7,8) is bonded in a distorted trigonal planar geometry to one C(5); one C(9); and one H(9,10) atom. The C(7,8)-C(9) bond length is 1.39 Å. The C(7,8)-H(9,10) bond length is 1.09 Å. In the eighth C site, C(9) is bonded in a distorted trigonal planar geometry to two equivalent C(7,8) and one N(11) atom. The C(9)-N(11) bond length is 1.46 Å. In the ninth C site, C(10) is bonded in a distorted trigonal planar geometry to one C(5), one C(6), and one H(11) atom. The C(10)-H(11) bond length is 1.09 Å. In the tenth C site, C(11) is bonded in a distorted bent 120 degrees geometry to one C(5), one O(1), and one O(3) atom. The C(11)-O(1) bond length is 1.25 Å. The C(11)-O(3) bond length is 1.30 Å. In the eleventh C site, C(12) is bonded in a distorted bent 120 degrees geometry to one C(6), one O(2), and one O(4) atom. The C(12)-O(2) bond length is 1.25 Å. The C(12)-O(4) bond length is 1.30 Å. There are nine inequivalent N sites. In the first N site, N(1) is bonded in a 3-coordinate geometry to one Zn(1), one C(3), and one N(3) atom. The N(1)-N(3) bond length is 1.40 Å. In the second N site, N(2) is bonded in a 3-coordinate geometry to one Zn(2), one C(4), and one N(4) atom. The N(2)-N(4) bond length is 1.40 Å. In the third N site, N(3) is bonded in a distorted trigonal planar geometry to one Zn(1), one C(1), and one N(1) atom. In the fourth N site, N(4) is bonded in a distorted trigonal planar geometry to one Zn(2), one C(2), and one N(2) atom. In the fifth N site, N(5) is bonded in a trigonal planar geometry to one Zn(2), one C(1), and one C(3) atom. In the sixth N site, N(6) is bonded in a trigonal planar geometry to one Zn(1), one C(2), and one C(4) atom. In the seventh N site, N(7,8) is bonded in a trigonal planar geometry to one C(1); one H(1,2); and one H(3,4) atom. The N(7,8)-H(1,2) bond length is 1.02 Å. The N(7,8)-H(3,4) bond length is 1.02 Å. In the eighth N site, N(9,10) is bonded in a distorted trigonal non-coplanar geometry to one C(3); one H(5,6); and one H(7,8) atom. The N(9,10)-H(5,6) bond length is 1.02 Å. The N(9,10)-H(7,8) bond length is 1.02 Å. In the ninth N site, N(11) is bonded in a trigonal planar geometry to one C(9) and two equivalent O(5,6) atoms. There is one shorter (1.24 Å) and one longer (1.25 Å) N(11)-O(5,6) bond length. There are six inequivalent H sites. In the first H site, H(1,2) is bonded in a single-bond geometry to one N(7,8) atom. In the second H site, H(3,4) is bonded in a single-bond geometry to one N(7,8) atom. In the third H site, H(5,6) is bonded in a single-bond geometry to one N(9,10) atom. In the fourth H site, H(7,8) is bonded in a single-bond geometry to one N(9,10) atom. In the fifth H site, H(9,10) is bonded in a single-bond geometry to one C(7,8) atom. In the sixth H site, H(11) is bonded in a single-bond geometry to one C(10) atom. There are five inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one C(11) atom. In the second O site, O(2) is bonded in a single-bond geometry to one C(12) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Zn(1) and one C(11) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Zn(2) and one C(12) atom. In the fifth O site, O(5,6) is bonded in a single-bond geometry to one N(11) atom. Linkers: 2 [O]C(=O)c1cc(C([O])=O)cc([N+](=O)[O-])c1 ,3 NC1=NN=C(N)[N]1 ,1 NC1=NC(N)=N[N]1. Metal clusters: 2 O=[C]O[Zn]1=NN=[Zn](O[C]=O)N=N1. The MOF has largest included sphere 1.84 A, density 2.03 g/cm3, surface area 3718.06 m2/g, accessible volume 0.12 cm3/g