FeC18N2H11O9(CH)2 crystallizes in the triclinic P-1 space group. The structure consists of four 02329_fluka molecules inside a FeC18N2H11O9 framework. In the FeC18N2H11O9 framework, Fe(1) is bonded in an octahedral geometry to one N(1), one N(2), one O(1), one O(2), one O(4), and one O(6) atom. The Fe(1)-N(1) bond length is 1.94 Å. The Fe(1)-N(2) bond length is 1.95 Å. The Fe(1)-O(1) bond length is 1.93 Å. The Fe(1)-O(2) bond length is 1.91 Å. The Fe(1)-O(4) bond length is 1.92 Å. The Fe(1)-O(6) bond length is 1.95 Å. There are eighteen 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(2), and one O(3) atom. The C(1)-C(2) bond length is 1.50 Å. The C(1)-O(2) bond length is 1.29 Å. The C(1)-O(3) 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(4) atom. The C(2)-C(3) bond length is 1.40 Å. The C(2)-C(4) bond length is 1.41 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 H(4) atom. The C(3)-C(4) bond length is 1.40 Å. The C(3)-H(4) bond length is 1.09 Å. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one C(2), one C(3), and one C(5) atom. The C(4)-C(5) bond length is 1.51 Å. In the fifth C site, C(5) is bonded in a distorted bent 120 degrees geometry to one C(4), one O(4), and one O(5) atom. The C(5)-O(4) bond length is 1.30 Å. The C(5)-O(5) bond length is 1.26 Å. In the sixth C site, C(6) is bonded in a distorted bent 120 degrees geometry to one C(7), one O(6), and one O(7) atom. The C(6)-C(7) bond length is 1.50 Å. The C(6)-O(6) bond length is 1.29 Å. The C(6)-O(7) bond length is 1.26 Å. In the seventh C site, C(7) is bonded in a trigonal planar geometry to one C(6), one C(8), and one C(9) atom. The C(7)-C(8) bond length is 1.40 Å. The C(7)-C(9) bond length is 1.41 Å. In the eighth C site, C(8) is bonded in a distorted single-bond geometry to one C(7), one C(9), and one H(5) atom. The C(8)-C(9) bond length is 1.40 Å. The C(8)-H(5) bond length is 1.09 Å. In the ninth C site, C(9) is bonded in a trigonal planar geometry to one C(10), one C(7), and one C(8) atom. The C(9)-C(10) bond length is 1.50 Å. In the tenth C site, C(10) is bonded in a distorted bent 120 degrees geometry to one C(9), one O(8), and one O(9) atom. The C(10)-O(8) bond length is 1.23 Å. The C(10)-O(9) bond length is 1.33 Å. In the eleventh C site, C(11) is bonded in a distorted trigonal planar geometry to one C(12), one N(1), and one H(6) atom. The C(11)-C(12) bond length is 1.39 Å. The C(11)-N(1) bond length is 1.34 Å. The C(11)-H(6) bond length is 1.09 Å. In the twelfth C site, C(12) is bonded in a distorted single-bond geometry to one C(11) and one H(7) atom. The C(12)-H(7) bond length is 1.09 Å. In the thirteenth C site, C(14) is bonded in a distorted single-bond geometry to one C(15) and one H(9) atom. The C(14)-C(15) bond length is 1.39 Å. The C(14)-H(9) bond length is 1.09 Å. In the fourteenth C site, C(15) is bonded in a distorted trigonal planar geometry to one C(14), one C(16), and one N(1) atom. The C(15)-C(16) bond length is 1.46 Å. The C(15)-N(1) bond length is 1.36 Å. In the fifteenth C site, C(16) is bonded in a distorted trigonal planar geometry to one C(15), one C(17), and one N(2) atom. The C(16)-C(17) bond length is 1.40 Å. The C(16)-N(2) bond length is 1.36 Å. In the sixteenth C site, C(17) is bonded in a distorted single-bond geometry to one C(16) and one H(10) atom. The C(17)-H(10) bond length is 1.09 Å. In the seventeenth C site, C(19) is bonded in a distorted single-bond geometry to one C(20) and one H(12) atom. The C(19)-C(20) bond length is 1.39 Å. The C(19)-H(12) bond length is 1.09 Å. In the eighteenth C site, C(20) is bonded in a distorted trigonal planar geometry to one C(19), one N(2), and one H(13) atom. The C(20)-N(2) bond length is 1.35 Å. The C(20)-H(13) bond length is 1.09 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one Fe(1), one C(11), and one C(15) atom. In the second N site, N(2) is bonded in a trigonal planar geometry to one Fe(1), one C(16), and one C(20) atom. There are eleven inequivalent H sites. In the first H site, H(1) is bonded in a distorted linear geometry to one O(1) and one O(3) atom. The H(1)-O(1) bond length is 1.02 Å. The H(1)-O(3) bond length is 1.56 Å. In the second H site, H(2) is bonded in a distorted bent 150 degrees geometry to one O(1) and one O(7) atom. The H(2)-O(1) bond length is 1.03 Å. The H(2)-O(7) bond length is 1.53 Å. In the third H site, H(3) is bonded in a linear geometry to one O(5) and one O(9) atom. The H(3)-O(5) bond length is 1.59 Å. The H(3)-O(9) bond length is 1.03 Å. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(3) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(8) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(11) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(12) atom. In the eighth H site, H(9) is bonded in a single-bond geometry to one C(14) atom. In the ninth H site, H(10) is bonded in a single-bond geometry to one C(17) atom. In the tenth H site, H(12) is bonded in a single-bond geometry to one C(19) atom. In the eleventh H site, H(13) is bonded in a single-bond geometry to one C(20) atom. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Fe(1), one H(1), and one H(2) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Fe(1) and one C(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one C(1) and one H(1) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Fe(1) and one C(5) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one C(5) and one H(3) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Fe(1) and one C(6) atom. In the seventh O site, O(7) is bonded in a water-like geometry to one C(6) and one H(2) atom. In the eighth O site, O(8) is bonded in a single-bond geometry to one C(10) atom. In the ninth O site, O(9) is bonded in a bent 120 degrees geometry to one C(10) and one H(3) atom. Linkers: 1 [O]C(=O)c1cc(C(=O)O)c(C([O])=O)cc1C(=O)O ,1 [O]C(=O)c1cc(C([O])=O)c(C([O])=O)cc1C([O])=O. Metal clusters: 1 [Fe] ,1 O.O=[C]O[Fe](O[C]=O)O[C]=O. The MOF has largest included sphere 2.19 A, density 1.81 g/cm3, surface area 3670.50 m2/g, accessible volume 0.11 cm3/g