CuC18NH8O4(CH)2 crystallizes in the cubic F23 space group. The structure consists of ninety-six 02329_fluka molecules inside a CuC18NH8O4 framework. In the CuC18NH8O4 framework, there are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a rectangular see-saw-like geometry to two equivalent O(1) and two equivalent O(4) atoms. Both Cu(1)-O(1) bond lengths are 1.84 Å. Both Cu(1)-O(4) bond lengths are 1.80 Å. In the second Cu site, Cu(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent O(2) and two equivalent O(3) atoms. Both Cu(2)-O(2) bond lengths are 1.85 Å. Both Cu(2)-O(3) bond lengths are 1.82 Å. There are eighteen inequivalent C sites. In the first C site, C(1) is bonded in a distorted trigonal planar geometry to one C(2), one C(20), and one H(1) atom. The C(1)-C(2) bond length is 1.40 Å. The C(1)-C(20) bond length is 1.41 Å. The C(1)-H(1) bond length is 1.08 Å. In the second C site, C(2) is bonded in a distorted trigonal planar geometry to one C(1), one C(17), and one H(2) atom. The C(2)-C(17) bond length is 1.40 Å. The C(2)-H(2) bond length is 1.08 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one C(8) and one H(3) atom. The C(3)-C(8) bond length is 1.42 Å. The C(3)-H(3) bond length is 1.08 Å. In the fourth C site, C(5) is bonded in a distorted single-bond geometry to one C(6) and one N(1) atom. The C(5)-C(6) bond length is 1.38 Å. The C(5)-N(1) bond length is 1.35 Å. In the fifth C site, C(6) is bonded in a distorted trigonal planar geometry to one C(13), one C(5), and one C(7) atom. The C(6)-C(13) bond length is 1.38 Å. The C(6)-C(7) bond length is 1.39 Å. In the sixth C site, C(7) is bonded in a distorted single-bond geometry to one C(6), one C(8), and one H(5) atom. The C(7)-C(8) bond length is 1.42 Å. The C(7)-H(5) bond length is 1.08 Å. In the seventh C site, C(8) is bonded in a trigonal planar geometry to one C(3), one C(7), and one C(9) atom. The C(8)-C(9) bond length is 1.45 Å. In the eighth C site, C(9) is bonded in a bent 120 degrees geometry to one C(8), one O(1), and one O(2) atom. The C(9)-O(1) bond length is 1.27 Å. The C(9)-O(2) bond length is 1.27 Å. In the ninth C site, C(10) is bonded in a bent 120 degrees geometry to one C(11), one O(3), and one O(4) atom. The C(10)-C(11) bond length is 1.45 Å. The C(10)-O(3) bond length is 1.27 Å. The C(10)-O(4) bond length is 1.27 Å. In the tenth C site, C(11) is bonded in a trigonal planar geometry to one C(10), one C(12), and one C(16) atom. The C(11)-C(12) bond length is 1.42 Å. The C(11)-C(16) bond length is 1.42 Å. In the eleventh C site, C(12) is bonded in a distorted single-bond geometry to one C(11), one C(13), and one H(6) atom. The C(12)-C(13) bond length is 1.39 Å. The C(12)-H(6) bond length is 1.08 Å. In the twelfth C site, C(13) is bonded in a distorted trigonal planar geometry to one C(12), one C(14), and one C(6) atom. The C(13)-C(14) bond length is 1.38 Å. In the thirteenth C site, C(14) is bonded in a distorted single-bond geometry to one C(13) and one N(1) atom. The C(14)-N(1) bond length is 1.35 Å. In the fourteenth C site, C(16) is bonded in a distorted single-bond geometry to one C(11) and one H(8) atom. The C(16)-H(8) bond length is 1.08 Å. In the fifteenth C site, C(17) is bonded in a distorted trigonal planar geometry to one C(18), one C(2), and one N(1) atom. The C(17)-C(18) bond length is 1.37 Å. The C(17)-N(1) bond length is 1.47 Å. In the sixteenth C site, C(18) is bonded in a distorted trigonal planar geometry to one C(17), one C(19), and one H(9) atom. The C(18)-C(19) bond length is 1.40 Å. The C(18)-H(9) bond length is 1.08 Å. In the seventeenth C site, C(19) is bonded in a distorted trigonal planar geometry to one C(18), one C(20), and one H(10) atom. The C(19)-C(20) bond length is 1.38 Å. The C(19)-H(10) bond length is 1.08 Å. In the eighteenth C site, C(20) is bonded in a trigonal planar geometry to one C(1), one C(19), and one C(20) atom. The C(20)-C(20) bond length is 1.54 Å. N(1) is bonded in a trigonal planar geometry to one C(14), one C(17), and one C(5) atom. There are eight inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(2) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(3) atom. In the fourth H site, H(5) is bonded in a single-bond geometry to one C(7) atom. In the fifth H site, H(6) is bonded in a single-bond geometry to one C(12) atom. In the sixth H site, H(8) is bonded in a single-bond geometry to one C(16) atom. In the seventh H site, H(9) is bonded in a single-bond geometry to one C(18) atom. In the eighth H site, H(10) is bonded in a single-bond geometry to one C(19) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Cu(1) and one C(9) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Cu(2) and one C(9) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Cu(2) and one C(10) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Cu(1) and one C(10) atom. Linkers: 24 [O]C(=O)c1ccc2c(c1)c1cc(C([O])=O)ccc1n2-c1ccc(-c2ccc(-n3c4ccc(C([O])=O)cc4c4cc(C([O])=O)ccc43)cc2)cc1. Metal clusters: 24 [C]1O[Cu]234O[C]O[Cu]2(O1)(O[C]O3)O[C]O4. RCSR code: nbo. The MOF has largest included sphere 24.79 A, density 0.31 g/cm3, surface area 4316.07 m2/g, accessible volume 2.75 cm3/g