Na2WC8H14O21(CH2)4 crystallizes in the monoclinic P2_1/c space group. The structure consists of sixteen 02329_fluka molecules inside a Na2WC8H14O21 framework. In the Na2WC8H14O21 framework, there are two inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(12), one O(14), one O(16), one O(17), one O(18), and one O(21) atom to form distorted NaO6 octahedra that share  a cornercorner with one W(1)O6 octahedra. The corner-sharing octahedral tilt angles are 36°. The Na(1)-O(12) bond length is 2.33 Å. The Na(1)-O(14) bond length is 2.30 Å. The Na(1)-O(16) bond length is 2.45 Å. The Na(1)-O(17) bond length is 2.37 Å. The Na(1)-O(18) bond length is 2.29 Å. The Na(1)-O(21) bond length is 2.60 Å. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to one O(1), one O(15), one O(19), one O(20), one O(5), and one O(7) atom. The Na(2)-O(1) bond length is 2.85 Å. The Na(2)-O(15) bond length is 2.38 Å. The Na(2)-O(19) bond length is 2.29 Å. The Na(2)-O(20) bond length is 2.47 Å. The Na(2)-O(5) bond length is 2.28 Å. The Na(2)-O(7) bond length is 2.24 Å. W(1) is bonded to one O(1), one O(15), one O(16), one O(2), one O(8), and one O(9) atom to form distorted WO6 octahedra that share  a cornercorner with one Na(1)O6 octahedra. The corner-sharing octahedral tilt angles are 36°. The W(1)-O(1) bond length is 2.19 Å. The W(1)-O(15) bond length is 1.78 Å. The W(1)-O(16) bond length is 1.75 Å. The W(1)-O(2) bond length is 1.98 Å. The W(1)-O(8) bond length is 2.20 Å. The W(1)-O(9) bond length is 1.96 Å. There are eight inequivalent C sites. In the first C site, C(8) is bonded in a distorted single-bond geometry to one O(9) atom. The C(8)-O(9) bond length is 1.43 Å. In the second C site, C(10) is bonded in a distorted bent 120 degrees geometry to one O(11) and one O(12) atom. The C(10)-O(11) bond length is 1.33 Å. The C(10)-O(12) bond length is 1.23 Å. In the third C site, C(12) is bonded in a distorted bent 120 degrees geometry to one O(13) and one O(14) atom. The C(12)-O(13) bond length is 1.33 Å. The C(12)-O(14) bond length is 1.23 Å. In the fourth 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 1.28 Å. The C(1)-O(3) bond length is 1.26 Å. In the fifth C site, C(2) is bonded in a distorted single-bond geometry to one O(2) atom. The C(2)-O(2) bond length is 1.43 Å. In the sixth C site, C(4) is bonded in a distorted bent 120 degrees geometry to one O(4) and one O(5) atom. The C(4)-O(4) bond length is 1.33 Å. The C(4)-O(5) bond length is 1.23 Å. In the seventh C site, C(6) is bonded in a distorted bent 120 degrees geometry to one O(6) and one O(7) atom. The C(6)-O(6) bond length is 1.32 Å. The C(6)-O(7) bond length is 1.24 Å. In the eighth C site, C(7) is bonded in a distorted bent 120 degrees geometry to one O(10) and one O(8) atom. The C(7)-O(10) bond length is 1.23 Å. The C(7)-O(8) bond length is 1.31 Å. There are fourteen inequivalent H sites. In the first H site, H(1) is bonded in a distorted single-bond geometry to one O(15) and one O(17) atom. The H(1)-O(15) bond length is 1.64 Å. The H(1)-O(17) bond length is 1.00 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(17) atom. The H(2)-O(17) bond length is 0.99 Å. In the third H site, H(5) is bonded in a single-bond geometry to one O(4) atom. The H(5)-O(4) bond length is 1.01 Å. In the fourth H site, H(8) is bonded in a distorted linear geometry to one O(21) and one O(6) atom. The H(8)-O(21) bond length is 1.58 Å. The H(8)-O(6) bond length is 1.03 Å. In the fifth H site, H(11) is bonded in a linear geometry to one O(11) and one O(20) atom. The H(11)-O(11) bond length is 1.08 Å. The H(11)-O(20) bond length is 1.42 Å. In the sixth H site, H(14) is bonded in a distorted linear geometry to one O(13) and one O(8) atom. The H(14)-O(13) bond length is 1.02 Å. The H(14)-O(8) bond length is 1.66 Å. In the seventh H site, H(15) is bonded in a single-bond geometry to one O(18) atom. The H(15)-O(18) bond length is 0.98 Å. In the eighth H site, H(16) is bonded in a single-bond geometry to one O(18) atom. The H(16)-O(18) bond length is 1.01 Å. In the ninth H site, H(17) is bonded in a distorted linear geometry to one O(17) and one O(19) atom. The H(17)-O(17) bond length is 1.62 Å. The H(17)-O(19) bond length is 1.01 Å. In the tenth H site, H(18) is bonded in a single-bond geometry to one O(19) atom. The H(18)-O(19) bond length is 0.98 Å. In the eleventh H site, H(19) is bonded in a distorted single-bond geometry to one O(10) and one O(20) atom. The H(19)-O(10) bond length is 1.66 Å. The H(19)-O(20) bond length is 1.00 Å. In the twelfth H site, H(20) is bonded in a distorted single-bond geometry to one O(20) atom. The H(20)-O(20) bond length is 1.01 Å. In the thirteenth H site, H(21) is bonded in a single-bond geometry to one O(21) atom. The H(21)-O(21) bond length is 1.00 Å. In the fourteenth H site, H(22) is bonded in a single-bond geometry to one O(21) atom. The H(22)-O(21) bond length is 0.99 Å. There are twenty-one inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Na(2), one W(1), and one C(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one W(1) and one C(2) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one C(1) atom. In the fourth O site, O(4) is bonded in a water-like geometry to one C(4) and one H(5) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one Na(2) and one C(4) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one C(6) and one H(8) atom. In the seventh O site, O(7) is bonded in a bent 150 degrees geometry to one Na(2) and one C(6) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one W(1), one C(7), and one H(14) atom. In the ninth O site, O(9) is bonded in a distorted bent 120 degrees geometry to one W(1) and one C(8) atom. In the tenth O site, O(10) is bonded in a distorted bent 150 degrees geometry to one C(7) and one H(19) atom. In the eleventh O site, O(11) is bonded in a bent 120 degrees geometry to one C(10) and one H(11) atom. In the twelfth O site, O(12) is bonded in a bent 150 degrees geometry to one Na(1) and one C(10) atom. In the thirteenth O site, O(13) is bonded in a water-like geometry to one C(12) and one H(14) atom. In the fourteenth O site, O(14) is bonded in a bent 150 degrees geometry to one Na(1) and one C(12) atom. In the fifteenth O site, O(15) is bonded in a distorted trigonal planar geometry to one Na(2), one W(1), and one H(1) atom. In the sixteenth O site, O(16) is bonded in a bent 150 degrees geometry to one Na(1) and one W(1) atom. In the seventeenth O site, O(17) is bonded in a distorted water-like geometry to one Na(1), one H(1), one H(17), and one H(2) atom. In the eighteenth O site, O(18) is bonded in a distorted water-like geometry to one Na(1), one H(15), and one H(16) atom. In the nineteenth O site, O(19) is bonded in a distorted water-like geometry to one Na(2), one H(17), and one H(18) atom. In the twentieth O site, O(20) is bonded in a 3-coordinate geometry to one Na(2), one H(11), one H(19), and one H(20) atom. In the twenty-first O site, O(21) is bonded in a distorted water-like geometry to one Na(1), one H(21), one H(22), and one H(8) atom. Linkers: 8 [O]C(=O)C([O])(CC(=O)O)CC(=O)O. Metal clusters: 4 O.O.O.O.O.O=[C]O.O=[C]O.O=[C]O.O[C]O[Na].[Na].[O][W]12([O])(O[C]C(=O)O1)O[C]C(=O)O2. The MOF has largest included sphere 3.04 A, density 2.06 g/cm3, surface area 2799.74 m2/g, accessible volume 0.07 cm3/g