Zn2C10N3H4O4 crystallizes in the triclinic P-1 space group. There are four inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one N(2), one N(5), one O(4), and two equivalent O(5) atoms to form edge-sharing ZnN2O3 trigonal bipyramids. The Zn(1)-N(2) bond length is 2.03 Å. The Zn(1)-N(5) bond length is 2.01 Å. The Zn(1)-O(4) bond length is 2.03 Å. There is one shorter (2.03 Å) and one longer (2.19 Å) Zn(1)-O(5) bond length. In the second Zn site, Zn(2) is bonded in a rectangular see-saw-like geometry to one O(1), one O(3), one O(6), and one O(7) atom. The Zn(2)-O(1) bond length is 2.04 Å. The Zn(2)-O(3) bond length is 2.03 Å. The Zn(2)-O(6) bond length is 2.02 Å. The Zn(2)-O(7) bond length is 2.08 Å. In the third Zn site, Zn(3) is bonded in a distorted rectangular see-saw-like geometry to one N(4), one N(6), and two equivalent O(8) atoms. The Zn(3)-N(4) bond length is 2.08 Å. The Zn(3)-N(6) bond length is 2.10 Å. There is one shorter (2.10 Å) and one longer (2.22 Å) Zn(3)-O(8) bond length. In the fourth Zn site, Zn(4) is bonded in a distorted rectangular see-saw-like geometry to one N(1), one N(3), and two equivalent O(2) atoms. The Zn(4)-N(1) bond length is 2.10 Å. The Zn(4)-N(3) bond length is 2.10 Å. There is one shorter (2.07 Å) and one longer (2.23 Å) Zn(4)-O(2) bond length. There are twenty inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(2), one O(1), and one O(2) atom. The C(1)-C(2) bond length is 1.49 Å. The C(1)-O(1) bond length is 1.24 Å. The C(1)-O(2) bond length is 1.29 Å. In the second C site, C(2) is bonded in a distorted trigonal planar geometry to one C(1), one C(3), and one N(1) atom. The C(2)-C(3) bond length is 1.38 Å. The C(2)-N(1) bond length is 1.37 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one C(2), one C(4), and one N(2) atom. The C(3)-C(4) bond length is 1.52 Å. The C(3)-N(2) bond length is 1.36 Å. In the fourth C site, C(4) is bonded in a distorted bent 120 degrees geometry to one C(3), one O(3), and one O(4) atom. The C(4)-O(3) bond length is 1.24 Å. The C(4)-O(4) bond length is 1.27 Å. In the fifth C site, C(5) is bonded in a distorted trigonal planar geometry to one C(6), one N(1), and one N(2) atom. The C(5)-C(6) bond length is 1.47 Å. The C(5)-N(1) bond length is 1.35 Å. The C(5)-N(2) bond length is 1.34 Å. In the sixth C site, C(6) is bonded in a trigonal planar geometry to one C(10), one C(5), and one C(7) atom. The C(6)-C(10) bond length is 1.39 Å. The C(6)-C(7) bond length is 1.38 Å. In the seventh C site, C(7) is bonded in a distorted single-bond geometry to one C(6) and one H(1) atom. The C(7)-H(1) bond length is 0.95 Å. In the eighth C site, C(8) is bonded in a distorted bent 120 degrees geometry to one N(3) and one H(2) atom. The C(8)-N(3) bond length is 1.33 Å. The C(8)-H(2) bond length is 0.95 Å. In the ninth C site, C(9) is bonded in a distorted bent 120 degrees geometry to one N(3) and one H(3) atom. The C(9)-N(3) bond length is 1.35 Å. The C(9)-H(3) bond length is 0.95 Å. In the tenth C site, C(10) is bonded in a distorted single-bond geometry to one C(6) and one H(4) atom. The C(10)-H(4) bond length is 0.95 Å. In the eleventh C site, C(11) is bonded in a bent 120 degrees geometry to one C(12), one O(5), and one O(6) atom. The C(11)-C(12) bond length is 1.48 Å. The C(11)-O(5) bond length is 1.29 Å. The C(11)-O(6) bond length is 1.24 Å. In the twelfth C site, C(12) is bonded in a distorted single-bond geometry to one C(11), one C(13), and one N(5) atom. The C(12)-C(13) bond length is 1.36 Å. The C(12)-N(5) bond length is 1.37 Å. In the thirteenth C site, C(13) is bonded in a 3-coordinate geometry to one C(12), one C(14), and one N(4) atom. The C(13)-C(14) bond length is 1.50 Å. The C(13)-N(4) bond length is 1.38 Å. In the fourteenth C site, C(14) is bonded in a distorted bent 120 degrees geometry to one C(13), one O(7), and one O(8) atom. The C(14)-O(7) bond length is 1.24 Å. The C(14)-O(8) bond length is 1.28 Å. In the fifteenth C site, C(15) is bonded in a distorted trigonal planar geometry to one C(16), one N(4), and one N(5) atom. The C(15)-C(16) bond length is 1.48 Å. The C(15)-N(4) bond length is 1.34 Å. The C(15)-N(5) bond length is 1.34 Å. In the sixteenth C site, C(16) is bonded in a trigonal planar geometry to one C(15), one C(17), and one C(20) atom. The C(16)-C(17) bond length is 1.39 Å. The C(16)-C(20) bond length is 1.41 Å. In the seventeenth C site, C(17) is bonded in a distorted single-bond geometry to one C(16), one C(18), and one H(5) atom. The C(17)-C(18) bond length is 1.39 Å. The C(17)-H(5) bond length is 0.95 Å. In the eighteenth C site, C(18) is bonded in a distorted trigonal planar geometry to one C(17), one N(6), and one H(6) atom. The C(18)-N(6) bond length is 1.34 Å. The C(18)-H(6) bond length is 0.95 Å. In the nineteenth C site, C(19) is bonded in a distorted bent 120 degrees geometry to one N(6) and one H(7) atom. The C(19)-N(6) bond length is 1.34 Å. The C(19)-H(7) bond length is 0.95 Å. In the twentieth C site, C(20) is bonded in a distorted single-bond geometry to one C(16) and one H(8) atom. The C(20)-H(8) bond length is 0.95 Å. There are six inequivalent N sites. In the first N site, N(1) is bonded in a distorted trigonal planar geometry to one Zn(4), one C(2), 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(3), and one C(5) atom. In the third N site, N(3) is bonded in a trigonal planar geometry to one Zn(4), one C(8), and one C(9) atom. In the fourth N site, N(4) is bonded in a distorted trigonal planar geometry to one Zn(3), one C(13), and one C(15) atom. In the fifth N site, N(5) is bonded in a distorted trigonal planar geometry to one Zn(1), one C(12), and one C(15) atom. In the sixth N site, N(6) is bonded in a trigonal planar geometry to one Zn(3), one C(18), and one C(19) atom. There are eight inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(7) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(8) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(9) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(10) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(17) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(18) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(19) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one C(20) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Zn(2) and one C(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent Zn(4) and one C(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Zn(2) and one C(4) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Zn(1) and one C(4) atom. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Zn(1) and one C(11) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Zn(2) and one C(11) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Zn(2) and one C(14) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to two equivalent Zn(3) and one C(14) atom. Linkers: 3 [O]C(=O)C1=C(C([O])=O)N=C(c2ccncc2)[N]1 ,1 [O]C(=O)[C]1N=C(c2ccncc2)N=C1C([O])=O. Metal clusters: 8 [Zn]. The MOF has largest included sphere 5.70 A, density 1.53 g/cm3, surface area 3025.91 m2/g, accessible volume 0.32 cm3/g