Cu(CO2)3 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in an octahedral geometry to one O(1), one O(3), one O(5), one O(6), one O(7), and one O(8) atom. The Cu(1)-O(1) bond length is 2.19 Å. The Cu(1)-O(3) bond length is 1.96 Å. The Cu(1)-O(5) bond length is 2.04 Å. The Cu(1)-O(6) bond length is 2.27 Å. The Cu(1)-O(7) bond length is 1.98 Å. The Cu(1)-O(8) bond length is 2.03 Å. In the second Cu site, Cu(2) is bonded in an octahedral geometry to one O(10), one O(11), one O(12), one O(2), one O(4), and one O(9) atom. The Cu(2)-O(10) bond length is 2.26 Å. The Cu(2)-O(11) bond length is 2.03 Å. The Cu(2)-O(12) bond length is 1.99 Å. The Cu(2)-O(2) bond length is 1.96 Å. The Cu(2)-O(4) bond length is 2.21 Å. The Cu(2)-O(9) bond length is 2.03 Å. There are six inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one O(1) and one O(2) atom. The C(1)-O(1) bond length is 1.24 Å. The C(1)-O(2) bond length is 1.25 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one O(3) and one O(4) atom. The C(2)-O(3) bond length is 1.26 Å. The C(2)-O(4) bond length is 1.23 Å. In the third C site, C(3) is bonded in a distorted bent 120 degrees geometry to one O(7) and one O(8) atom. The C(3)-O(7) bond length is 1.26 Å. The C(3)-O(8) bond length is 1.24 Å. In the fourth C site, C(4) is bonded in a distorted bent 120 degrees geometry to one O(5) and one O(6) atom. The C(4)-O(5) bond length is 1.27 Å. The C(4)-O(6) bond length is 1.23 Å. In the fifth C site, C(5) is bonded in a distorted bent 120 degrees geometry to one O(10) and one O(9) atom. The C(5)-O(10) bond length is 1.23 Å. The C(5)-O(9) bond length is 1.27 Å. In the sixth C site, C(6) is bonded in a distorted bent 120 degrees geometry to one O(11) and one O(12) atom. The C(6)-O(11) bond length is 1.25 Å. The C(6)-O(12) bond length is 1.25 Å. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a water-like geometry to one Cu(1) and one C(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Cu(2) and one C(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Cu(1) and one C(2) atom. In the fourth O site, O(4) is bonded in a water-like geometry to one Cu(2) and one C(2) atom. In the fifth O site, O(5) is bonded in a water-like geometry to one Cu(1) and one C(4) atom. In the sixth O site, O(6) is bonded in a water-like geometry to one Cu(1) and one C(4) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Cu(1) and one C(3) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Cu(1) and one C(3) atom. In the ninth O site, O(9) is bonded in a bent 120 degrees geometry to one Cu(2) and one C(5) atom. In the tenth O site, O(10) is bonded in a water-like geometry to one Cu(2) and one C(5) atom. In the eleventh O site, O(11) is bonded in a water-like geometry to one Cu(2) and one C(6) atom. In the twelfth O site, O(12) is bonded in a water-like geometry to one Cu(2) and one C(6) atom. Linkers: 10 [O]C(=O)C([O])=O. Metal clusters: 8 [Cu]. The MOF has largest included sphere 5.64 A, density 1.06 g/cm3, surface area 3402.56 m2/g, accessible volume 0.68 cm3/g