K2FeC18H13(N2O5)2(CH)5C3NH6 crystallizes in the monoclinic P2_1/c space group. The structure consists of twenty 02329_fluka molecules and four trimethylamine molecules inside a K2FeC18H13(N2O5)2 framework. In the K2FeC18H13(N2O5)2 framework, there are two inequivalent K sites. In the first K site, K(1) is bonded to one O(3), one O(5), one O(6), one O(8), and one O(9) atom to form KO5 trigonal bipyramids that share  an edgeedge with one Fe(1)O6 pentagonal pyramid and  an edgeedge with one K(2)O5 trigonal bipyramid. The K(1)-O(3) bond length is 2.91 Å. The K(1)-O(5) bond length is 2.78 Å. The K(1)-O(6) bond length is 2.65 Å. The K(1)-O(8) bond length is 2.76 Å. The K(1)-O(9) bond length is 2.70 Å. In the second K site, K(2) is bonded to one O(2), one O(3), one O(5), and two equivalent O(10) atoms to form distorted KO5 trigonal bipyramids that share  an edgeedge with one Fe(1)O6 pentagonal pyramid,  an edgeedge with one K(1)O5 trigonal bipyramid, and  an edgeedge with one K(2)O5 trigonal bipyramid. The K(2)-O(2) bond length is 2.73 Å. The K(2)-O(3) bond length is 2.67 Å. The K(2)-O(5) bond length is 2.71 Å. There is one shorter (2.67 Å) and one longer (2.72 Å) K(2)-O(10) bond length. Fe(1) is bonded to one O(1), one O(2), one O(4), one O(5), one O(7), and one O(8) atom to form distorted FeO6 pentagonal pyramids that share  an edgeedge with one K(1)O5 trigonal bipyramid and  an edgeedge with one K(2)O5 trigonal bipyramid. The Fe(1)-O(1) bond length is 2.01 Å. The Fe(1)-O(2) bond length is 1.98 Å. The Fe(1)-O(4) bond length is 1.99 Å. The Fe(1)-O(5) bond length is 2.01 Å. The Fe(1)-O(7) bond length is 2.06 Å. The Fe(1)-O(8) bond length is 2.09 Å. There are eighteen inequivalent C sites. In the first C site, C(21) is bonded in a distorted trigonal planar geometry to one C(22), one C(25), and one N(5) atom. The C(21)-C(22) bond length is 1.37 Å. The C(21)-C(25) bond length is 1.51 Å. The C(21)-N(5) bond length is 1.36 Å. In the second C site, C(22) is bonded in a distorted single-bond geometry to one C(21) and one H(22) atom. The C(22)-H(22) bond length is 0.95 Å. In the third C site, C(24) is bonded in a distorted single-bond geometry to one C(26) and one H(24) atom. The C(24)-C(26) bond length is 1.41 Å. The C(24)-H(24) bond length is 0.95 Å. In the fourth C site, C(25) is bonded in a distorted bent 120 degrees geometry to one C(21), one N(4), and one O(9) atom. The C(25)-N(4) bond length is 1.33 Å. The C(25)-O(9) bond length is 1.23 Å. In the fifth C site, C(26) is bonded in a distorted trigonal planar geometry to one C(24), one N(5), and one O(8) atom. The C(26)-N(5) bond length is 1.38 Å. The C(26)-O(8) bond length is 1.28 Å. In the sixth C site, C(2) is bonded in a 3-coordinate geometry to one N(2) and two equivalent H(6,7) atoms. The C(2)-N(2) bond length is 1.45 Å. Both C(2)-H(6,7) bond lengths are 0.99 Å. In the seventh C site, C(3) is bonded in a distorted bent 120 degrees geometry to one C(4), one N(2), and one O(3) atom. The C(3)-C(4) bond length is 1.47 Å. The C(3)-N(2) bond length is 1.35 Å. The C(3)-O(3) bond length is 1.25 Å. In the eighth C site, C(4) is bonded in a trigonal planar geometry to one C(3), one C(5), and one C(9) atom. The C(4)-C(5) bond length is 1.40 Å. The C(4)-C(9) bond length is 1.41 Å. In the ninth C site, C(5) is bonded in a single-bond geometry to one C(4) and one H(8) atom. The C(5)-H(8) bond length is 0.95 Å. In the tenth C site, C(8) is bonded in a distorted single-bond geometry to one O(2) atom. The C(8)-O(2) bond length is 1.34 Å. In the eleventh C site, C(9) is bonded in a distorted single-bond geometry to one C(4) and one O(1) atom. The C(9)-O(1) bond length is 1.32 Å. In the twelfth C site, C(11) is bonded in a 3-coordinate geometry to one N(3), one H(13), and one H(14) atom. The C(11)-N(3) bond length is 1.46 Å. The C(11)-H(13) bond length is 0.99 Å. The C(11)-H(14) bond length is 0.99 Å. In the thirteenth C site, C(12) is bonded in a distorted bent 120 degrees geometry to one C(13), one N(3), and one O(6) atom. The C(12)-C(13) bond length is 1.48 Å. The C(12)-N(3) bond length is 1.35 Å. The C(12)-O(6) bond length is 1.25 Å. In the fourteenth C site, C(13) is bonded in a trigonal planar geometry to one C(12), one C(14), and one C(18) atom. The C(13)-C(14) bond length is 1.40 Å. The C(13)-C(18) bond length is 1.40 Å. In the fifteenth C site, C(14) is bonded in a distorted single-bond geometry to one C(13) and one H(15) atom. The C(14)-H(15) bond length is 0.95 Å. In the sixteenth C site, C(17) is bonded in a distorted single-bond geometry to one O(5) atom. The C(17)-O(5) bond length is 1.34 Å. In the seventeenth C site, C(18) is bonded in a distorted single-bond geometry to one C(13) and one O(4) atom. The C(18)-O(4) bond length is 1.33 Å. In the eighteenth C site, C(20) is bonded in a 3-coordinate geometry to one N(4) and two equivalent H(20,21) atoms. The C(20)-N(4) bond length is 1.46 Å. Both C(20)-H(20,21) bond lengths are 0.99 Å. There are four inequivalent N sites. In the first N site, N(2) is bonded in a trigonal planar geometry to one C(2), one C(3), and one H(1) atom. The N(2)-H(1) bond length is 0.88 Å. In the second N site, N(3) is bonded in a trigonal planar geometry to one C(11), one C(12), and one H(2) atom. The N(3)-H(2) bond length is 0.88 Å. In the third N site, N(4) is bonded in a trigonal planar geometry to one C(20), one C(25), and one H(3) atom. The N(4)-H(3) bond length is 0.88 Å. In the fourth N site, N(5) is bonded in a trigonal planar geometry to one C(21), one C(26), and one O(7) atom. The N(5)-O(7) bond length is 1.35 Å. There are eleven inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one N(2) atom. In the second H site, H(2) is bonded in a single-bond geometry to one N(3) atom. In the third H site, H(3) is bonded in a single-bond geometry to one N(4) atom. In the fourth H site, H(6,7) is bonded in a single-bond geometry to one C(2) atom. In the fifth H site, H(8) is bonded in a single-bond geometry to one C(5) atom. In the sixth H site, H(13) is bonded in a single-bond geometry to one C(11) atom. In the seventh H site, H(14) is bonded in a single-bond geometry to one C(11) atom. In the eighth H site, H(15) is bonded in a single-bond geometry to one C(14) atom. In the ninth H site, H(20,21) is bonded in a single-bond geometry to one C(20) atom. In the tenth H site, H(22) is bonded in a single-bond geometry to one C(22) atom. In the eleventh H site, H(24) is bonded in a single-bond geometry to one C(24) atom. There are ten inequivalent O sites. In the first O site, O(9) is bonded in a distorted bent 150 degrees geometry to one K(1) and one C(25) atom. In the second O site, O(1) is bonded in a bent 120 degrees geometry to one Fe(1) and one C(9) atom. In the third O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one K(2), one Fe(1), and one C(8) atom. In the fourth O site, O(3) is bonded in a distorted single-bond geometry to one K(1), one K(2), and one C(3) atom. In the fifth O site, O(4) is bonded in a bent 120 degrees geometry to one Fe(1) and one C(18) atom. In the sixth O site, O(5) is bonded in a distorted tetrahedral geometry to one K(1), one K(2), one Fe(1), and one C(17) atom. In the seventh O site, O(6) is bonded in a bent 150 degrees geometry to one K(1) and one C(12) atom. In the eighth O site, O(7) is bonded in a bent 120 degrees geometry to one Fe(1) and one N(5) atom. In the ninth O site, O(8) is bonded in a 3-coordinate geometry to one K(1), one Fe(1), and one C(26) atom. In the tenth O site, O(10) is bonded in an L-shaped geometry to two equivalent K(2) atoms. Linkers: 4 [O]c1cccc(C(=O)NCCN(CCNC(=O)C2=CC=CC(=O)[N+]2[O-])CCNC(=O)c2cccc([O])c2[O])c1[O]. Metal clusters: 2 [C]1[N]O[Fe]23(O1)(O[C]=[C]O2)O[C]=[C]O3.[C]1[N]O[Fe]23(O1)(O[C]=[C]O2)O[C]=[C]O3.[O].[O].[O].[O].[O][K].[O][K].[O][K].[O][K]. RCSR code: flu. The MOF has largest included sphere 5.31 A, density 1.18 g/cm3, surface area 3886.15 m2/g, accessible volume 0.31 cm3/g