Sr2Cu(CO2)6 crystallizes in the triclinic P-1 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 8-coordinate geometry to one O(10), one O(11), one O(12), one O(3), one O(4), one O(8), and two equivalent O(7) atoms. The Sr(1)-O(10) bond length is 2.61 Å. The Sr(1)-O(11) bond length is 2.55 Å. The Sr(1)-O(12) bond length is 2.65 Å. The Sr(1)-O(3) bond length is 2.64 Å. The Sr(1)-O(4) bond length is 2.68 Å. The Sr(1)-O(8) bond length is 2.60 Å. There is one shorter (2.65 Å) and one longer (2.76 Å) Sr(1)-O(7) bond length. In the second Sr site, Sr(2) is bonded in a 5-coordinate geometry to one O(10), one O(12), one O(5), one O(6), and one O(9) atom. The Sr(2)-O(10) bond length is 2.61 Å. The Sr(2)-O(12) bond length is 2.59 Å. The Sr(2)-O(5) bond length is 2.83 Å. The Sr(2)-O(6) bond length is 2.76 Å. The Sr(2)-O(9) bond length is 2.56 Å. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(2) atoms. Both Cu(1)-O(1) bond lengths are 1.96 Å. Both Cu(1)-O(2) bond lengths are 1.94 Å. In the second Cu site, Cu(2) is bonded in a square co-planar geometry to two equivalent O(5) and two equivalent O(6) atoms. Both Cu(2)-O(5) bond lengths are 1.93 Å. Both Cu(2)-O(6) bond lengths are 1.93 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(3) atom. The C(1)-O(1) bond length is 1.27 Å. The C(1)-O(3) bond length is 1.24 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one O(2) and one O(4) atom. The C(2)-O(2) bond length is 1.27 Å. The C(2)-O(4) bond length is 1.22 Å. In the third C site, C(3) is bonded in a distorted bent 120 degrees geometry to one O(5) and one O(7) atom. The C(3)-O(5) bond length is 1.26 Å. The C(3)-O(7) bond length is 1.25 Å. In the fourth C site, C(4) is bonded in a distorted bent 120 degrees geometry to one O(6) and one O(8) atom. The C(4)-O(6) bond length is 1.27 Å. The C(4)-O(8) bond length is 1.24 Å. In the fifth C site, C(5) is bonded in a distorted bent 120 degrees geometry to one O(10) and one O(11) atom. The C(5)-O(10) bond length is 1.25 Å. The C(5)-O(11) bond length is 1.25 Å. In the sixth C site, C(6) is bonded in a distorted bent 120 degrees geometry to one O(12) and one O(9) atom. The C(6)-O(12) bond length is 1.25 Å. The C(6)-O(9) bond length is 1.24 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 water-like geometry to one Cu(1) and one C(2) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Sr(1) and one C(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Sr(1) and one C(2) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Sr(2), one Cu(2), and one C(3) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Sr(2), one Cu(2), and one C(4) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to two equivalent Sr(1) and one C(3) atom. In the eighth O site, O(8) is bonded in a distorted bent 120 degrees geometry to one Sr(1) and one C(4) atom. In the ninth O site, O(9) is bonded in a distorted bent 120 degrees geometry to one Sr(2) and one C(6) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Sr(1), one Sr(2), and one C(5) atom. In the eleventh O site, O(11) is bonded in a bent 120 degrees geometry to one Sr(1) and one C(5) atom. In the twelfth O site, O(12) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(2), and one C(6) atom. Linkers: 6 [O]C(=O)C([O])=O. Metal clusters: 4 [Sr] ,2 [Cu]. The MOF has largest included sphere 5.46 A, density 1.77 g/cm3, surface area 2763.56 m2/g, accessible volume 0.28 cm3/g