W6Cu2C5N2H3O17 crystallizes in the triclinic P-1 space group. There are six inequivalent W sites. In the first W site, W(1) is bonded in a 5-coordinate geometry to one O(1), one O(12), one O(13), one O(2), and one O(7) atom. The W(1)-O(1) bond length is 1.81 Å. The W(1)-O(12) bond length is 1.97 Å. The W(1)-O(13) bond length is 1.89 Å. The W(1)-O(2) bond length is 2.10 Å. The W(1)-O(7) bond length is 2.24 Å. In the second W site, W(2) is bonded to one O(11), one O(13), one O(3), one O(6), and one O(8) atom to form a mixture of distorted edge and corner-sharing WO5 square pyramids. The W(2)-O(11) bond length is 2.26 Å. The W(2)-O(13) bond length is 1.95 Å. The W(2)-O(3) bond length is 1.85 Å. The W(2)-O(6) bond length is 1.89 Å. The W(2)-O(8) bond length is 1.97 Å. In the third W site, W(3) is bonded in a 5-coordinate geometry to one O(10), one O(11), one O(2), one O(5), and one O(6) atom. The W(3)-O(10) bond length is 1.90 Å. The W(3)-O(11) bond length is 2.25 Å. The W(3)-O(2) bond length is 1.82 Å. The W(3)-O(5) bond length is 1.95 Å. The W(3)-O(6) bond length is 2.06 Å. In the fourth W site, W(4) is bonded in a 4-coordinate geometry to one O(10), one O(12), one O(7), and one O(9) atom. The W(4)-O(10) bond length is 2.27 Å. The W(4)-O(12) bond length is 1.91 Å. The W(4)-O(7) bond length is 2.25 Å. The W(4)-O(9) bond length is 1.91 Å. In the fifth W site, W(5) is bonded to one O(10), one O(14), one O(4), one O(8), and one O(9) atom to form distorted corner-sharing WO5 square pyramids. The W(5)-O(10) bond length is 2.27 Å. The W(5)-O(14) bond length is 1.80 Å. The W(5)-O(4) bond length is 2.12 Å. The W(5)-O(8) bond length is 1.88 Å. The W(5)-O(9) bond length is 1.96 Å. In the sixth W site, W(6) is bonded to one O(11), one O(3), one O(4), one O(5), and one O(7) atom to form a mixture of distorted edge and corner-sharing WO5 square pyramids. The W(6)-O(11) bond length is 2.26 Å. The W(6)-O(3) bond length is 2.07 Å. The W(6)-O(4) bond length is 1.84 Å. The W(6)-O(5) bond length is 1.96 Å. The W(6)-O(7) bond length is 1.90 Å. There are three inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a distorted trigonal planar geometry to one Cu(1), one O(14), and one O(17) atom. The Cu(1)-Cu(1) bond length is 0.26 Å. The Cu(1)-O(14) bond length is 1.84 Å. The Cu(1)-O(17) bond length is 1.91 Å. In the second Cu site, Cu(2) is bonded in a square co-planar geometry to two equivalent N(1) and two equivalent O(1) atoms. Both Cu(2)-N(1) bond lengths are 2.01 Å. Both Cu(2)-O(1) bond lengths are 1.93 Å. In the third Cu site, Cu(3) is bonded in a square co-planar geometry to two equivalent N(2) and two equivalent O(15) atoms. Both Cu(3)-N(2) bond lengths are 1.97 Å. Both Cu(3)-O(15) bond lengths are 1.93 Å. There are five inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(4), one N(1), and one H(1) atom. The C(1)-C(4) bond length is 1.39 Å. The C(1)-N(1) bond length is 1.31 Å. The C(1)-H(1) bond length is 0.93 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one C(3), one N(1), and one H(2) atom. The C(2)-C(3) bond length is 1.39 Å. The C(2)-N(1) bond length is 1.37 Å. The C(2)-H(2) bond length is 0.93 Å. In the third C site, C(3) is bonded in a distorted trigonal planar geometry to one C(2), one C(5), and one N(2) atom. The C(3)-C(5) bond length is 1.45 Å. The C(3)-N(2) bond length is 1.31 Å. In the fourth C site, C(4) is bonded in a distorted trigonal planar geometry to one C(1), one N(2), and one H(3) atom. The C(4)-N(2) bond length is 1.34 Å. The C(4)-H(3) bond length is 0.93 Å. In the fifth C site, C(5) is bonded in a distorted bent 120 degrees geometry to one C(3), one O(15), and one O(16) atom. The C(5)-O(15) bond length is 1.29 Å. The C(5)-O(16) bond length is 1.27 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one Cu(2), one C(1), and one C(2) atom. In the second N site, N(2) is bonded in a trigonal planar geometry to one Cu(3), one C(3), and one C(4) atom. There are three inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(2) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(4) atom. There are seventeen inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one W(1) and one Cu(2) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one W(1) and one W(3) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one W(2) and one W(6) atom. In the fourth O site, O(4) is bonded in a single-bond geometry to one W(5) and one W(6) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one W(3) and one W(6) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one W(2) and one W(3) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one W(1), one W(4), and one W(6) atom. In the eighth O site, O(8) is bonded in a bent 150 degrees geometry to one W(2) and one W(5) atom. In the ninth O site, O(9) is bonded in a bent 120 degrees geometry to one W(4) and one W(5) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one W(3), one W(4), and one W(5) atom. In the eleventh O site, O(11) is bonded in a distorted T-shaped geometry to one W(2), one W(3), and one W(6) atom. In the twelfth O site, O(12) is bonded in a bent 120 degrees geometry to one W(1) and one W(4) atom. In the thirteenth O site, O(13) is bonded in a bent 150 degrees geometry to one W(1) and one W(2) atom. In the fourteenth O site, O(14) is bonded in a distorted bent 150 degrees geometry to one W(5) and one Cu(1) atom. In the fifteenth O site, O(15) is bonded in a bent 120 degrees geometry to one Cu(3) and one C(5) atom. In the sixteenth O site, O(16) is bonded in a single-bond geometry to one C(5) atom. In the seventeenth O site, O(17) is bonded in a single-bond geometry to one Cu(1) atom. Linkers: 2 [O]C(=O)c1cnccn1. Metal clusters: 4 [Cu] ,12 [W]. The MOF has largest included sphere 5.26 A, density 2.95 g/cm3, surface area 1348.87 m2/g, accessible volume 0.17 cm3/g