MgCuCO5 crystallizes in the monoclinic P2_1/c space group. Mg(1) is bonded to one O(2), one O(3), two equivalent O(4), and two equivalent O(5) atoms to form distorted edge-sharing MgO6 octahedra. Cu(1) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(4), one O(5), and two equivalent O(2) atoms. C(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Cu(1) and one C(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Mg(1), two equivalent Cu(1), and one C(1) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Mg(1) and one C(1) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to two equivalent Mg(1) and one Cu(1) atom. In the fifth O site, O(5) is bonded in a trigonal non-coplanar geometry to two equivalent Mg(1) and one Cu(1) atom.
MgCuCO5 crystallizes in the monoclinic P2_1/c space group. Mg(1) is bonded to one O(2), one O(3), two equivalent O(4), and two equivalent O(5) atoms to form distorted edge-sharing MgO6 octahedra. The Mg(1)-O(2) bond length is 2.31 Å. The Mg(1)-O(3) bond length is 2.06 Å. There is one shorter (2.07 Å) and one longer (2.08 Å) Mg(1)-O(4) bond length. There is one shorter (2.07 Å) and one longer (2.09 Å) Mg(1)-O(5) bond length. Cu(1) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(4), one O(5), and two equivalent O(2) atoms. The Cu(1)-O(1) bond length is 1.91 Å. The Cu(1)-O(4) bond length is 1.82 Å. The Cu(1)-O(5) bond length is 1.85 Å. There is one shorter (1.92 Å) and one longer (2.61 Å) Cu(1)-O(2) bond length. C(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. The C(1)-O(1) bond length is 1.32 Å. The C(1)-O(2) bond length is 1.33 Å. The C(1)-O(3) bond length is 1.25 Å. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Cu(1) and one C(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Mg(1), two equivalent Cu(1), and one C(1) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Mg(1) and one C(1) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to two equivalent Mg(1) and one Cu(1) atom. In the fifth O site, O(5) is bonded in a trigonal non-coplanar geometry to two equivalent Mg(1) and one Cu(1) atom.