SmC18H19O13CH2CO crystallizes in the triclinic P-1 space group. The structure consists of two dimethyl ether molecules inside a SmC18H19O13 framework. In the SmC18H19O13 framework, Sm(1) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(13), one O(14), one O(2), one O(7), one O(8), and one O(9) atom. The Sm(1)-O(1) bond length is 2.50 Å. The Sm(1)-O(10) bond length is 2.28 Å. The Sm(1)-O(13) bond length is 2.48 Å. The Sm(1)-O(14) bond length is 2.43 Å. The Sm(1)-O(2) bond length is 2.59 Å. The Sm(1)-O(7) bond length is 2.44 Å. The Sm(1)-O(8) bond length is 2.46 Å. The Sm(1)-O(9) bond length is 2.38 Å. There are eighteen inequivalent C sites. In the first C site, C(1) is bonded in a bent 120 degrees geometry to one C(2), one O(1), and one O(2) atom. The C(1)-C(2) bond length is 1.49 Å. The C(1)-O(1) bond length is 1.28 Å. The C(1)-O(2) bond length is 1.28 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one C(1), one C(3), and one C(7) atom. The C(2)-C(3) bond length is 1.40 Å. The C(2)-C(7) bond length is 1.39 Å. In the third C site, C(3) is bonded in a distorted trigonal planar geometry to one C(2), one C(4), and one H(8) atom. The C(3)-C(4) bond length is 1.40 Å. The C(3)-H(8) bond length is 1.09 Å. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one C(3), one C(5), and one C(8) atom. The C(4)-C(5) bond length is 1.41 Å. The C(4)-C(8) bond length is 1.49 Å. In the fifth C site, C(5) is bonded in a distorted single-bond geometry to one C(4), one C(6), and one H(9) atom. The C(5)-C(6) bond length is 1.40 Å. The C(5)-H(9) bond length is 1.09 Å. In the sixth C site, C(6) is bonded in a distorted single-bond geometry to one C(5) and one O(5) atom. The C(6)-O(5) bond length is 1.36 Å. In the seventh C site, C(7) is bonded in a distorted single-bond geometry to one C(2) and one H(10) atom. The C(7)-H(10) bond length is 1.09 Å. In the eighth C site, C(8) is bonded in a distorted bent 120 degrees geometry to one C(4), one O(3), and one O(4) atom. The C(8)-O(3) bond length is 1.33 Å. The C(8)-O(4) bond length is 1.24 Å. In the ninth C site, C(9) is bonded in a distorted trigonal non-coplanar geometry to one H(11), one H(12), and one O(5) atom. The C(9)-H(11) bond length is 1.10 Å. The C(9)-H(12) bond length is 1.10 Å. The C(9)-O(5) bond length is 1.44 Å. In the tenth C site, C(10) is bonded in a distorted trigonal non-coplanar geometry to one H(13), one H(14), and one O(6) atom. The C(10)-H(13) bond length is 1.10 Å. The C(10)-H(14) bond length is 1.10 Å. The C(10)-O(6) bond length is 1.43 Å. In the eleventh C site, C(11) is bonded in a distorted bent 120 degrees geometry to one C(12), one O(7), and one O(8) atom. The C(11)-C(12) bond length is 1.49 Å. The C(11)-O(7) bond length is 1.27 Å. The C(11)-O(8) bond length is 1.28 Å. In the twelfth C site, C(12) is bonded in a trigonal planar geometry to one C(11), one C(13), and one C(17) atom. The C(12)-C(13) bond length is 1.40 Å. The C(12)-C(17) bond length is 1.40 Å. In the thirteenth C site, C(13) is bonded in a distorted single-bond geometry to one C(12) and one H(15) atom. The C(13)-H(15) bond length is 1.09 Å. In the fourteenth C site, C(15) is bonded in a distorted single-bond geometry to one C(16) and one H(16) atom. The C(15)-C(16) bond length is 1.40 Å. The C(15)-H(16) bond length is 1.09 Å. In the fifteenth C site, C(16) is bonded in a trigonal planar geometry to one C(15), one C(17), and one C(18) atom. The C(16)-C(17) bond length is 1.39 Å. The C(16)-C(18) bond length is 1.50 Å. In the sixteenth C site, C(17) is bonded in a distorted single-bond geometry to one C(12), one C(16), and one H(17) atom. The C(17)-H(17) bond length is 1.09 Å. In the seventeenth C site, C(18) is bonded in a distorted bent 120 degrees geometry to one C(16), one O(10), and one O(9) atom. The C(18)-O(10) bond length is 1.27 Å. The C(18)-O(9) bond length is 1.27 Å. In the eighteenth C site, C(20) is bonded in a distorted trigonal non-coplanar geometry to one H(20), one H(21), and one O(12) atom. The C(20)-H(20) bond length is 1.10 Å. The C(20)-H(21) bond length is 1.10 Å. The C(20)-O(12) bond length is 1.43 Å. There are nineteen inequivalent H sites. In the first H site, H(1) is bonded in a linear geometry to one O(3) and one O(6) atom. The H(1)-O(3) bond length is 1.03 Å. The H(1)-O(6) bond length is 1.54 Å. In the second H site, H(2) is bonded in a distorted single-bond geometry to one O(12) and one O(6) atom. The H(2)-O(12) bond length is 1.67 Å. The H(2)-O(6) bond length is 1.00 Å. In the third H site, H(3) is bonded in a single-bond geometry to one O(12) and one O(8) atom. The H(3)-O(12) bond length is 1.00 Å. The H(3)-O(8) bond length is 1.69 Å. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(13) atom. The H(4)-O(13) bond length is 0.99 Å. In the fifth H site, H(5) is bonded in a single-bond geometry to one O(13) atom. The H(5)-O(13) bond length is 0.98 Å. In the sixth H site, H(6) is bonded in a single-bond geometry to one O(14) atom. The H(6)-O(14) bond length is 0.99 Å. In the seventh H site, H(7) is bonded in a distorted single-bond geometry to one O(14) and one O(4) atom. The H(7)-O(14) bond length is 1.00 Å. The H(7)-O(4) bond length is 1.68 Å. In the eighth H site, H(8) is bonded in a single-bond geometry to one C(3) atom. In the ninth H site, H(9) is bonded in a single-bond geometry to one C(5) atom. In the tenth H site, H(10) is bonded in a single-bond geometry to one C(7) atom. In the eleventh H site, H(11) is bonded in a single-bond geometry to one C(9) atom. In the twelfth H site, H(12) is bonded in a single-bond geometry to one C(9) atom. In the thirteenth H site, H(13) is bonded in a single-bond geometry to one C(10) atom. In the fourteenth H site, H(14) is bonded in a single-bond geometry to one C(10) atom. In the fifteenth H site, H(15) is bonded in a single-bond geometry to one C(13) atom. In the sixteenth H site, H(16) is bonded in a single-bond geometry to one C(15) atom. In the seventeenth H site, H(17) is bonded in a single-bond geometry to one C(17) atom. In the eighteenth H site, H(20) is bonded in a single-bond geometry to one C(20) atom. In the nineteenth H site, H(21) is bonded in a single-bond geometry to one C(20) atom. There are thirteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Sm(1) and one C(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Sm(1) and one C(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one C(8) and one H(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one C(8) and one H(7) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one C(6) and one C(9) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one C(10), one H(1), and one H(2) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one Sm(1) and one C(11) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one Sm(1), one C(11), and one H(3) atom. In the ninth O site, O(9) is bonded in a 2-coordinate geometry to one Sm(1) and one C(18) atom. In the tenth O site, O(10) is bonded in a distorted linear geometry to one Sm(1) and one C(18) atom. In the eleventh O site, O(12) is bonded in a 3-coordinate geometry to one C(20), one H(2), and one H(3) atom. In the twelfth O site, O(13) is bonded in a water-like geometry to one Sm(1), one H(4), and one H(5) atom. In the thirteenth O site, O(14) is bonded in a distorted water-like geometry to one Sm(1), one H(6), and one H(7) atom. Linkers: 2 [O]C(=O)c1cc(OCCO)cc(C([O])=O)c1. Metal clusters: 2 [Sm]. RCSR code: sql. The MOF has largest included sphere 2.31 A, density 1.88 g/cm3, surface area 3791.02 m2/g, accessible volume 0.10 cm3/g