MgCu2(CO2)6(CH3)6 crystallizes in the triclinic P-1 space group. The structure consists of twelve 02329_fluka molecules inside a MgCu2(CO2)6 framework. In the MgCu2(CO2)6 framework, Mg(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(7), and one O(8) atom to form MgO6 octahedra that share  an edgeedge with one Cu(1)O5 trigonal bipyramid and  an edgeedge with one Cu(2)O5 trigonal bipyramid. The Mg(1)-O(1) bond length is 2.15 Å. The Mg(1)-O(2) bond length is 2.15 Å. The Mg(1)-O(3) bond length is 1.99 Å. The Mg(1)-O(4) bond length is 1.99 Å. The Mg(1)-O(7) bond length is 2.22 Å. The Mg(1)-O(8) bond length is 2.22 Å. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(1), one O(11), one O(5), one O(7), and one O(9) atom to form distorted CuO5 trigonal bipyramids that share  an edgeedge with one Mg(1)O6 octahedra. The Cu(1)-O(1) bond length is 2.19 Å. The Cu(1)-O(11) bond length is 1.98 Å. The Cu(1)-O(5) bond length is 2.00 Å. The Cu(1)-O(7) bond length is 2.05 Å. The Cu(1)-O(9) bond length is 1.97 Å. In the second Cu site, Cu(2) is bonded to one O(10), one O(12), one O(2), one O(6), and one O(8) atom to form distorted CuO5 trigonal bipyramids that share  an edgeedge with one Mg(1)O6 octahedra. The Cu(2)-O(10) bond length is 1.97 Å. The Cu(2)-O(12) bond length is 1.99 Å. The Cu(2)-O(2) bond length is 2.20 Å. The Cu(2)-O(6) bond length is 1.99 Å. The Cu(2)-O(8) bond length is 2.05 Å. There are six inequivalent C sites. In the first C site, C(3) is bonded in a distorted bent 120 degrees geometry to one O(1) and one O(3) atom. The C(3)-O(1) bond length is 1.29 Å. The C(3)-O(3) bond length is 1.25 Å. In the second C site, C(4) is bonded in a distorted bent 120 degrees geometry to one O(2) and one O(4) atom. The C(4)-O(2) bond length is 1.29 Å. The C(4)-O(4) bond length is 1.25 Å. In the third C site, C(7) is bonded in a distorted bent 120 degrees geometry to one O(5) and one O(7) atom. The C(7)-O(5) bond length is 1.27 Å. The C(7)-O(7) bond length is 1.28 Å. In the fourth C site, C(8) is bonded in a distorted bent 120 degrees geometry to one O(6) and one O(8) atom. The C(8)-O(6) bond length is 1.27 Å. The C(8)-O(8) bond length is 1.28 Å. In the fifth C site, C(11) is bonded in a distorted bent 120 degrees geometry to one O(11) and one O(9) atom. The C(11)-O(11) bond length is 1.28 Å. The C(11)-O(9) bond length is 1.27 Å. In the sixth C site, C(12) is bonded in a distorted bent 120 degrees geometry to one O(10) and one O(12) atom. The C(12)-O(10) bond length is 1.27 Å. The C(12)-O(12) bond length is 1.28 Å. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Mg(1), one Cu(1), and one C(3) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Mg(1), one Cu(2), and one C(4) atom. In the third O site, O(3) is bonded in a linear geometry to one Mg(1) and one C(3) atom. In the fourth O site, O(4) is bonded in a linear geometry to one Mg(1) and one C(4) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Cu(1) and one C(7) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Cu(2) and one C(8) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Mg(1), one Cu(1), and one C(7) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Mg(1), one Cu(2), and one C(8) atom. In the ninth O site, O(9) is bonded in a bent 120 degrees geometry to one Cu(1) and one C(11) atom. In the tenth O site, O(10) is bonded in a bent 120 degrees geometry to one Cu(2) and one C(12) atom. In the eleventh O site, O(11) is bonded in a bent 120 degrees geometry to one Cu(1) and one C(11) atom. In the twelfth O site, O(12) is bonded in a bent 120 degrees geometry to one Cu(2) and one C(12) atom. Linkers: 12 CC([O])=O. Metal clusters: 2 [Mg] ,4 [Cu]. The MOF has largest included sphere 2.15 A, density 1.87 g/cm3, surface area 3836.94 m2/g, accessible volume 0.11 cm3/g