Cr2Ag3(CO2)12 crystallizes in the monoclinic P2_1/c space group. There are four inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one O(1), one O(11), one O(3), one O(5), one O(7), and one O(9) atom to form CrO6 octahedra that share  a cornercorner with one Ag(5)O6 pentagonal pyramid. The Cr(1)-O(1) bond length is 1.97 Å. The Cr(1)-O(11) bond length is 1.97 Å. The Cr(1)-O(3) bond length is 1.95 Å. The Cr(1)-O(5) bond length is 1.96 Å. The Cr(1)-O(7) bond length is 1.98 Å. The Cr(1)-O(9) bond length is 2.00 Å. In the second Cr site, Cr(2) is bonded to one O(13), one O(15), one O(17), one O(19), one O(21), and one O(23) atom to form CrO6 octahedra that share  a cornercorner with one Ag(5)O6 pentagonal pyramid. The Cr(2)-O(13) bond length is 1.97 Å. The Cr(2)-O(15) bond length is 1.97 Å. The Cr(2)-O(17) bond length is 1.97 Å. The Cr(2)-O(19) bond length is 1.97 Å. The Cr(2)-O(21) bond length is 1.98 Å. The Cr(2)-O(23) bond length is 1.96 Å. In the third Cr site, Cr(3) is bonded in an octahedral geometry to one O(25), one O(27), one O(29), one O(31), one O(33), and one O(35) atom. The Cr(3)-O(25) bond length is 1.98 Å. The Cr(3)-O(27) bond length is 1.96 Å. The Cr(3)-O(29) bond length is 1.98 Å. The Cr(3)-O(31) bond length is 1.96 Å. The Cr(3)-O(33) bond length is 1.96 Å. The Cr(3)-O(35) bond length is 1.98 Å. In the fourth Cr site, Cr(4) is bonded in an octahedral geometry to one O(37), one O(39), one O(41), one O(43), one O(45), and one O(47) atom. The Cr(4)-O(37) bond length is 1.98 Å. The Cr(4)-O(39) bond length is 1.98 Å. The Cr(4)-O(41) bond length is 1.97 Å. The Cr(4)-O(43) bond length is 1.97 Å. The Cr(4)-O(45) bond length is 1.97 Å. The Cr(4)-O(47) bond length is 1.98 Å. There are six inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a 5-coordinate geometry to one O(25), one O(30), one O(4), one O(6), and one O(8) atom. The Ag(1)-O(25) bond length is 2.34 Å. The Ag(1)-O(30) bond length is 2.71 Å. The Ag(1)-O(4) bond length is 2.39 Å. The Ag(1)-O(6) bond length is 2.60 Å. The Ag(1)-O(8) bond length is 2.41 Å. In the second Ag site, Ag(2) is bonded in a 5-coordinate geometry to one O(18), one O(34), one O(36), one O(40), and one O(9) atom. The Ag(2)-O(18) bond length is 2.44 Å. The Ag(2)-O(34) bond length is 2.36 Å. The Ag(2)-O(36) bond length is 2.64 Å. The Ag(2)-O(40) bond length is 2.59 Å. The Ag(2)-O(9) bond length is 2.31 Å. In the third Ag site, Ag(3) is bonded in a 4-coordinate geometry to one O(10), one O(21), one O(38), and one O(40) atom. The Ag(3)-O(10) bond length is 2.50 Å. The Ag(3)-O(21) bond length is 2.39 Å. The Ag(3)-O(38) bond length is 2.65 Å. The Ag(3)-O(40) bond length is 2.42 Å. In the fourth Ag site, Ag(4) is bonded in a 4-coordinate geometry to one O(11), one O(26), one O(30), and one O(32) atom. The Ag(4)-O(11) bond length is 2.36 Å. The Ag(4)-O(26) bond length is 2.58 Å. The Ag(4)-O(30) bond length is 2.42 Å. The Ag(4)-O(32) bond length is 2.63 Å. In the fifth Ag site, Ag(5) is bonded to one O(10), one O(12), one O(15), one O(26), one O(28), and one O(7) atom to form distorted AgO6 pentagonal pyramids that share  a cornercorner with one Cr(1)O6 octahedra and  a cornercorner with one Cr(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 56-58°. The Ag(5)-O(10) bond length is 2.61 Å. The Ag(5)-O(12) bond length is 2.35 Å. The Ag(5)-O(15) bond length is 2.54 Å. The Ag(5)-O(26) bond length is 2.48 Å. The Ag(5)-O(28) bond length is 2.35 Å. The Ag(5)-O(7) bond length is 2.67 Å. In the sixth Ag site, Ag(6) is bonded in a 5-coordinate geometry to one O(20), one O(23), one O(38), one O(46), and one O(48) atom. The Ag(6)-O(20) bond length is 2.73 Å. The Ag(6)-O(23) bond length is 2.33 Å. The Ag(6)-O(38) bond length is 2.38 Å. The Ag(6)-O(46) bond length is 2.55 Å. The Ag(6)-O(48) bond length is 2.40 Å. There are twenty-four 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 1.30 Å. The C(1)-O(2) bond length is 1.23 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 1.28 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(5) and one O(6) atom. The C(3)-O(5) bond length is 1.27 Å. The C(3)-O(6) bond length is 1.22 Å. In the fourth C site, C(4) is bonded in a distorted bent 120 degrees geometry to one O(7) and one O(8) atom. The C(4)-O(7) bond length is 1.28 Å. The C(4)-O(8) 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 1.24 Å. The C(5)-O(9) bond length is 1.28 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 1.28 Å. The C(6)-O(12) bond length is 1.23 Å. In the seventh C site, C(7) is bonded in a distorted bent 120 degrees geometry to one O(13) and one O(14) atom. The C(7)-O(13) bond length is 1.31 Å. The C(7)-O(14) bond length is 1.21 Å. In the eighth C site, C(8) is bonded in a distorted bent 120 degrees geometry to one O(15) and one O(16) atom. The C(8)-O(15) bond length is 1.29 Å. The C(8)-O(16) bond length is 1.22 Å. In the ninth C site, C(9) is bonded in a distorted bent 120 degrees geometry to one O(17) and one O(18) atom. The C(9)-O(17) bond length is 1.27 Å. The C(9)-O(18) bond length is 1.23 Å. In the tenth C site, C(10) is bonded in a distorted bent 120 degrees geometry to one O(19) and one O(20) atom. The C(10)-O(19) bond length is 1.27 Å. The C(10)-O(20) bond length is 1.23 Å. In the eleventh C site, C(11) is bonded in a distorted bent 120 degrees geometry to one O(21) and one O(22) atom. The C(11)-O(21) bond length is 1.28 Å. The C(11)-O(22) bond length is 1.23 Å. In the twelfth C site, C(12) is bonded in a distorted bent 120 degrees geometry to one O(23) and one O(24) atom. The C(12)-O(23) bond length is 1.30 Å. The C(12)-O(24) bond length is 1.22 Å. In the thirteenth C site, C(13) is bonded in a distorted bent 120 degrees geometry to one O(25) and one O(26) atom. The C(13)-O(25) bond length is 1.27 Å. The C(13)-O(26) bond length is 1.24 Å. In the fourteenth C site, C(14) is bonded in a distorted bent 120 degrees geometry to one O(27) and one O(28) atom. The C(14)-O(27) bond length is 1.30 Å. The C(14)-O(28) bond length is 1.22 Å. In the fifteenth C site, C(15) is bonded in a distorted bent 120 degrees geometry to one O(29) and one O(30) atom. The C(15)-O(29) bond length is 1.28 Å. The C(15)-O(30) bond length is 1.24 Å. In the sixteenth C site, C(16) is bonded in a distorted bent 120 degrees geometry to one O(31) and one O(32) atom. The C(16)-O(31) bond length is 1.27 Å. The C(16)-O(32) bond length is 1.21 Å. In the seventeenth C site, C(17) is bonded in a distorted bent 120 degrees geometry to one O(33) and one O(34) atom. The C(17)-O(33) bond length is 1.30 Å. The C(17)-O(34) bond length is 1.22 Å. In the eighteenth C site, C(18) is bonded in a distorted bent 120 degrees geometry to one O(35) and one O(36) atom. The C(18)-O(35) bond length is 1.28 Å. The C(18)-O(36) bond length is 1.23 Å. In the nineteenth C site, C(19) is bonded in a distorted bent 120 degrees geometry to one O(37) and one O(38) atom. The C(19)-O(37) bond length is 1.27 Å. The C(19)-O(38) bond length is 1.23 Å. In the twentieth C site, C(20) is bonded in a distorted bent 120 degrees geometry to one O(39) and one O(40) atom. The C(20)-O(39) bond length is 1.29 Å. The C(20)-O(40) bond length is 1.24 Å. In the twenty-first C site, C(21) is bonded in a distorted bent 120 degrees geometry to one O(41) and one O(42) atom. The C(21)-O(41) bond length is 1.28 Å. The C(21)-O(42) bond length is 1.23 Å. In the twenty-second C site, C(22) is bonded in a distorted bent 120 degrees geometry to one O(43) and one O(44) atom. The C(22)-O(43) bond length is 1.28 Å. The C(22)-O(44) bond length is 1.23 Å. In the twenty-third C site, C(23) is bonded in a distorted bent 120 degrees geometry to one O(45) and one O(46) atom. The C(23)-O(45) bond length is 1.29 Å. The C(23)-O(46) bond length is 1.22 Å. In the twenty-fourth C site, C(24) is bonded in a distorted bent 120 degrees geometry to one O(47) and one O(48) atom. The C(24)-O(47) bond length is 1.30 Å. The C(24)-O(48) bond length is 1.22 Å. There are forty-eight inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Cr(1) and one C(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to one C(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Cr(1) and one C(2) atom. In the fourth O site, O(4) is bonded in a water-like geometry to one Ag(1) and one C(2) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Cr(1) and one C(3) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one Ag(1) and one C(3) atom. In the seventh O site, O(7) is bonded in a 2-coordinate geometry to one Cr(1), one Ag(5), and one C(4) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one Ag(1) and one C(4) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Cr(1), one Ag(2), and one C(5) atom. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to one Ag(3), one Ag(5), and one C(5) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal planar geometry to one Cr(1), one Ag(4), and one C(6) atom. In the twelfth O site, O(12) is bonded in a distorted single-bond geometry to one Ag(5) and one C(6) atom. In the thirteenth O site, O(13) is bonded in a bent 120 degrees geometry to one Cr(2) and one C(7) atom. In the fourteenth O site, O(14) is bonded in a single-bond geometry to one C(7) atom. In the fifteenth O site, O(15) is bonded in a distorted trigonal planar geometry to one Cr(2), one Ag(5), and one C(8) atom. In the sixteenth O site, O(16) is bonded in a single-bond geometry to one C(8) atom. In the seventeenth O site, O(17) is bonded in a bent 120 degrees geometry to one Cr(2) and one C(9) atom. In the eighteenth O site, O(18) is bonded in a water-like geometry to one Ag(2) and one C(9) atom. In the nineteenth O site, O(19) is bonded in a bent 120 degrees geometry to one Cr(2) and one C(10) atom. In the twentieth O site, O(20) is bonded in a distorted single-bond geometry to one Ag(6) and one C(10) atom. In the twenty-first O site, O(21) is bonded in a distorted trigonal planar geometry to one Cr(2), one Ag(3), and one C(11) atom. In the twenty-second O site, O(22) is bonded in a single-bond geometry to one C(11) atom. In the twenty-third O site, O(23) is bonded in a distorted trigonal planar geometry to one Cr(2), one Ag(6), and one C(12) atom. In the twenty-fourth O site, O(24) is bonded in a single-bond geometry to one C(12) atom. In the twenty-fifth O site, O(25) is bonded in a distorted trigonal planar geometry to one Cr(3), one Ag(1), and one C(13) atom. In the twenty-sixth O site, O(26) is bonded in a distorted single-bond geometry to one Ag(4), one Ag(5), and one C(13) atom. In the twenty-seventh O site, O(27) is bonded in a bent 120 degrees geometry to one Cr(3) and one C(14) atom. In the twenty-eighth O site, O(28) is bonded in a distorted single-bond geometry to one Ag(5) and one C(14) atom. In the twenty-ninth O site, O(29) is bonded in a bent 120 degrees geometry to one Cr(3) and one C(15) atom. In the thirtieth O site, O(30) is bonded in a 3-coordinate geometry to one Ag(1), one Ag(4), and one C(15) atom. In the thirty-first O site, O(31) is bonded in a bent 120 degrees geometry to one Cr(3) and one C(16) atom. In the thirty-second O site, O(32) is bonded in a distorted single-bond geometry to one Ag(4) and one C(16) atom. In the thirty-third O site, O(33) is bonded in a bent 120 degrees geometry to one Cr(3) and one C(17) atom. In the thirty-fourth O site, O(34) is bonded in a distorted bent 120 degrees geometry to one Ag(2) and one C(17) atom. In the thirty-fifth O site, O(35) is bonded in a bent 120 degrees geometry to one Cr(3) and one C(18) atom. In the thirty-sixth O site, O(36) is bonded in a distorted single-bond geometry to one Ag(2) and one C(18) atom. In the thirty-seventh O site, O(37) is bonded in a bent 120 degrees geometry to one Cr(4) and one C(19) atom. In the thirty-eighth O site, O(38) is bonded in a 3-coordinate geometry to one Ag(3), one Ag(6), and one C(19) atom. In the thirty-ninth O site, O(39) is bonded in a bent 120 degrees geometry to one Cr(4) and one C(20) atom. In the fortieth O site, O(40) is bonded in a distorted trigonal non-coplanar geometry to one Ag(2), one Ag(3), and one C(20) atom. In the forty-first O site, O(41) is bonded in a bent 120 degrees geometry to one Cr(4) and one C(21) atom. In the forty-second O site, O(42) is bonded in a single-bond geometry to one C(21) atom. In the forty-third O site, O(43) is bonded in a bent 120 degrees geometry to one Cr(4) and one C(22) atom. In the forty-fourth O site, O(44) is bonded in a single-bond geometry to one C(22) atom. In the forty-fifth O site, O(45) is bonded in a bent 120 degrees geometry to one Cr(4) and one C(23) atom. In the forty-sixth O site, O(46) is bonded in a distorted single-bond geometry to one Ag(6) and one C(23) atom. In the forty-seventh O site, O(47) is bonded in a bent 120 degrees geometry to one Cr(4) and one C(24) atom. In the forty-eighth O site, O(48) is bonded in a distorted single-bond geometry to one Ag(6) and one C(24) atom. Linkers: 46 [O]C(=O)C([O])=O. Metal clusters: 16 [Cr] ,24 [Ag]. The MOF has largest included sphere 5.25 A, density 2.12 g/cm3, surface area 2530.65 m2/g, accessible volume 0.19 cm3/g