MnCu3C9O18Cl crystallizes in the orthorhombic P2_12_12_1 space group. Mn(1) is bonded in an octahedral geometry to one O(1), one O(11), one O(13), one O(17), one O(5), and one O(7) atom. The Mn(1)-O(1) bond length is 2.18 Å. The Mn(1)-O(11) bond length is 2.13 Å. The Mn(1)-O(13) bond length is 2.15 Å. The Mn(1)-O(17) bond length is 2.08 Å. The Mn(1)-O(5) bond length is 2.11 Å. The Mn(1)-O(7) bond length is 2.14 Å. There are three inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a distorted trigonal bipyramidal geometry to one O(16), one O(18), one O(2), one O(4), and one Cl(1) atom. The Cu(1)-O(16) bond length is 1.93 Å. The Cu(1)-O(18) bond length is 1.91 Å. The Cu(1)-O(2) bond length is 1.91 Å. The Cu(1)-O(4) bond length is 1.97 Å. The Cu(1)-Cl(1) bond length is 2.55 Å. In the second Cu site, Cu(2) is bonded in a 5-coordinate geometry to one O(10), one O(4), one O(6), one O(8), and one Cl(1) atom. The Cu(2)-O(10) bond length is 1.93 Å. The Cu(2)-O(4) bond length is 1.92 Å. The Cu(2)-O(6) bond length is 1.88 Å. The Cu(2)-O(8) bond length is 1.92 Å. The Cu(2)-Cl(1) bond length is 2.72 Å. In the third Cu site, Cu(3) is bonded in a 5-coordinate geometry to one O(10), one O(12), one O(14), one O(16), and one Cl(1) atom. The Cu(3)-O(10) bond length is 1.92 Å. The Cu(3)-O(12) bond length is 1.91 Å. The Cu(3)-O(14) bond length is 1.93 Å. The Cu(3)-O(16) bond length is 1.91 Å. The Cu(3)-Cl(1) bond length is 2.80 Å. There are nine inequivalent C sites. In the first C site, C(1) is bonded in a distorted trigonal planar geometry to one C(2), one O(1), and one O(2) atom. The C(1)-C(2) bond length is 1.61 Å. The C(1)-O(1) bond length is 1.22 Å. The C(1)-O(2) bond length is 1.24 Å. In the second C site, C(2) is bonded in a distorted water-like geometry to one C(1), one C(3), one O(3), and one O(4) atom. The C(2)-C(3) bond length is 1.59 Å. The C(2)-O(3) bond length is 1.46 Å. The C(2)-O(4) bond length is 1.36 Å. In the third C site, C(3) is bonded in a distorted trigonal planar geometry to one C(2), one O(5), and one O(6) atom. The C(3)-O(5) bond length is 1.28 Å. The C(3)-O(6) bond length is 1.19 Å. In the fourth C site, C(4) is bonded in a distorted trigonal planar geometry to one C(5), one O(7), and one O(8) atom. The C(4)-C(5) bond length is 1.59 Å. The C(4)-O(7) bond length is 1.21 Å. The C(4)-O(8) bond length is 1.28 Å. In the fifth C site, C(5) is bonded in a distorted water-like geometry to one C(4), one C(6), one O(10), and one O(9) atom. The C(5)-C(6) bond length is 1.53 Å. The C(5)-O(10) bond length is 1.36 Å. The C(5)-O(9) bond length is 1.38 Å. In the sixth C site, C(6) is bonded in a distorted trigonal planar geometry to one C(5), one O(11), and one O(12) atom. The C(6)-O(11) bond length is 1.20 Å. The C(6)-O(12) bond length is 1.29 Å. In the seventh C site, C(7) is bonded in a distorted trigonal planar geometry to one C(8), one O(13), and one O(14) atom. The C(7)-C(8) bond length is 1.51 Å. The C(7)-O(13) bond length is 1.24 Å. The C(7)-O(14) bond length is 1.23 Å. In the eighth C site, C(8) is bonded in a distorted water-like geometry to one C(7), one C(9), one O(15), and one O(16) atom. The C(8)-C(9) bond length is 1.55 Å. The C(8)-O(15) bond length is 1.40 Å. The C(8)-O(16) bond length is 1.42 Å. In the ninth C site, C(9) is bonded in a distorted trigonal planar geometry to one C(8), one O(17), and one O(18) atom. The C(9)-O(17) bond length is 1.23 Å. The C(9)-O(18) bond length is 1.24 Å. There are eighteen inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Mn(1) and one C(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Cu(1) and one C(1) atom. In the third O site, O(3) is bonded in a single-bond geometry to one C(2) atom. In the fourth O site, O(4) is bonded in a trigonal non-coplanar geometry to one Cu(1), one Cu(2), and one C(2) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Mn(1) and one C(3) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Cu(2) and one C(3) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Mn(1) and one C(4) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Cu(2) and one C(4) atom. In the ninth O site, O(9) is bonded in a single-bond geometry to one C(5) atom. In the tenth O site, O(10) is bonded in a distorted trigonal non-coplanar geometry to one Cu(2), one Cu(3), and one C(5) atom. In the eleventh O site, O(11) is bonded in a bent 120 degrees geometry to one Mn(1) and one C(6) atom. In the twelfth O site, O(12) is bonded in a bent 120 degrees geometry to one Cu(3) and one C(6) atom. In the thirteenth O site, O(13) is bonded in a bent 120 degrees geometry to one Mn(1) and one C(7) atom. In the fourteenth O site, O(14) is bonded in a bent 120 degrees geometry to one Cu(3) and one C(7) atom. In the fifteenth O site, O(15) is bonded in a single-bond geometry to one C(8) atom. In the sixteenth O site, O(16) is bonded in a trigonal non-coplanar geometry to one Cu(1), one Cu(3), and one C(8) atom. In the seventeenth O site, O(17) is bonded in a bent 120 degrees geometry to one Mn(1) and one C(9) atom. In the eighteenth O site, O(18) is bonded in a bent 120 degrees geometry to one Cu(1) and one C(9) atom. Cl(1) is bonded in a 3-coordinate geometry to one Cu(1), one Cu(2), and one Cu(3) atom. Linkers: 12 [O]C(=O)C([O])([O])C([O])=O. Metal clusters: 4 [Mn] ,12 [Cu]. The MOF has largest included sphere 10.77 A, density 0.79 g/cm3, surface area 2746.06 m2/g, accessible volume 0.92 cm3/g