Cu2C19P3N2H17O9 crystallizes in the orthorhombic Pbam space group. Cu(1) is bonded in a rectangular see-saw-like geometry to one N(1), one O(1), one O(4), and one O(5) atom. The Cu(1)-N(1) bond length is 2.02 Å. The Cu(1)-O(1) bond length is 1.92 Å. The Cu(1)-O(4) bond length is 1.93 Å. The Cu(1)-O(5) bond length is 2.08 Å. There are eleven inequivalent C sites. In the first C site, C(9) is bonded in a distorted single-bond geometry to two equivalent C(1) and one H(9) atom. Both C(9)-C(1) bond lengths are 1.39 Å. The C(9)-H(9) bond length is 0.83 Å. In the second C site, C(10) is bonded in a trigonal planar geometry to two equivalent C(2) and one P(2) atom. Both C(10)-C(2) bond lengths are 1.39 Å. The C(10)-P(2) bond length is 1.80 Å. In the third C site, C(11) is bonded in a water-like geometry to two equivalent C(6) atoms. Both C(11)-C(6) bond lengths are 1.54 Å. In the fourth C site, C(1) is bonded in a trigonal planar geometry to one C(2), one C(9), and one P(1) atom. The C(1)-C(2) bond length is 1.40 Å. The C(1)-P(1) bond length is 1.81 Å. In the fifth C site, C(2) is bonded in a distorted single-bond geometry to one C(1), one C(10), and one H(2) atom. The C(2)-H(2) bond length is 0.96 Å. In the sixth C site, C(3) is bonded in a distorted single-bond geometry to one C(4), one C(7), and one H(3) atom. The C(3)-C(4) bond length is 1.37 Å. The C(3)-C(7) bond length is 1.32 Å. The C(3)-H(3) bond length is 0.96 Å. In the seventh C site, C(4) is bonded in a trigonal planar geometry to one C(3), one C(5), and one C(6) atom. The C(4)-C(5) bond length is 1.38 Å. The C(4)-C(6) bond length is 1.52 Å. In the eighth C site, C(5) is bonded in a distorted single-bond geometry to one C(4) and one H(4) atom. The C(5)-H(4) bond length is 0.96 Å. In the ninth C site, C(6) is bonded in a water-like geometry to one C(11), one C(4), one H(5), and one H(6) atom. The C(6)-H(5) bond length is 0.96 Å. The C(6)-H(6) bond length is 0.96 Å. In the tenth C site, C(7) is bonded in a distorted trigonal planar geometry to one C(3), one N(1), and one H(7) atom. The C(7)-N(1) bond length is 1.42 Å. The C(7)-H(7) bond length is 0.96 Å. In the eleventh C site, C(8) is bonded in a distorted bent 120 degrees geometry to one N(1) and one H(8) atom. The C(8)-N(1) bond length is 1.35 Å. The C(8)-H(8) bond length is 0.92 Å. There are two inequivalent P sites. In the first P site, P(1) is bonded in a distorted tetrahedral geometry to one C(1), one O(1), one O(2), and one O(3) atom. The P(1)-O(1) bond length is 1.51 Å. The P(1)-O(2) bond length is 1.57 Å. The P(1)-O(3) bond length is 1.51 Å. In the second P site, P(2) is bonded in a tetrahedral geometry to one C(10), one O(5), and two equivalent O(4) atoms. The P(2)-O(5) bond length is 1.55 Å. Both P(2)-O(4) bond lengths are 1.51 Å. N(1) is bonded in a trigonal planar geometry to one Cu(1), one C(7), and one C(8) atom. There are nine inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(2) atom. The H(1)-O(2) bond length is 0.84 Å. 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(3) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(5) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(6) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(6) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(7) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one C(8) atom. In the ninth H site, H(9) is bonded in a single-bond geometry to one C(9) atom. There are five inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Cu(1) and one P(1) atom. In the second O site, O(2) is bonded in a water-like geometry to one P(1) and one H(1) atom. In the third O site, O(3) is bonded in a single-bond geometry to one P(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Cu(1) and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Cu(1) and one P(2) atom. Linkers: 2 [O][P]c1cc([P][O])cc(P([O])([O])=O)c1 ,4 [C](Cc1ccncc1)Cc1ccncc1 ,2 [O]P([O])(=O)c1cc(P([O])(=O)O)cc(P([O])(=O)O)c1. Metal clusters: 2 [O]P(O)O[Cu]OP1O[Cu](OP([O])O)OP(O[Cu]OP([O])O)O[Cu](OP([O])O)O1. RCSR code: sql. The MOF has largest included sphere 6.14 A, density 1.48 g/cm3, surface area 3464.20 m2/g, accessible volume 0.33 cm3/g