Cu2C4P2NH10O9 crystallizes in the triclinic P1 space group. There are four inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a distorted square co-planar geometry to one O(1), one O(13), one O(14), one O(2), one O(7), and one O(8) atom. The Cu(1)-O(1) bond length is 2.00 Å. The Cu(1)-O(13) bond length is 2.55 Å. The Cu(1)-O(14) bond length is 2.63 Å. The Cu(1)-O(2) bond length is 2.00 Å. The Cu(1)-O(7) bond length is 1.95 Å. The Cu(1)-O(8) bond length is 1.95 Å. In the second Cu site, Cu(2) is bonded to one N(1), one O(15), one O(3), one O(5), and one O(9) atom to form distorted CuNO4 square pyramids that share  a cornercorner with one Cu(4)O6 octahedra,  a cornercorner with one P(3)CO3 tetrahedra, and corners with two equivalent P(1)CO3 tetrahedra. The corner-sharing octahedral tilt angles are 38°. The Cu(2)-N(1) bond length is 2.01 Å. The Cu(2)-O(15) bond length is 2.32 Å. The Cu(2)-O(3) bond length is 1.95 Å. The Cu(2)-O(5) bond length is 1.93 Å. The Cu(2)-O(9) bond length is 2.02 Å. In the third Cu site, Cu(3) is bonded to one N(2), one O(10), one O(16), one O(4), and one O(6) atom to form distorted CuNO4 square pyramids that share  a cornercorner with one Cu(4)O6 octahedra,  a cornercorner with one P(4)CO3 tetrahedra, and corners with two equivalent P(2)CO3 tetrahedra. The corner-sharing octahedral tilt angles are 35°. The Cu(3)-N(2) bond length is 2.01 Å. The Cu(3)-O(10) bond length is 2.01 Å. The Cu(3)-O(16) bond length is 2.34 Å. The Cu(3)-O(4) bond length is 1.95 Å. The Cu(3)-O(6) bond length is 1.94 Å. In the fourth Cu site, Cu(4) is bonded to one O(11), one O(12), one O(15), one O(16), one O(17), and one O(18) atom to form distorted CuO6 octahedra that share  a cornercorner with one Cu(2)NO4 square pyramid,  a cornercorner with one Cu(3)NO4 square pyramid,  a cornercorner with one P(3)CO3 tetrahedra, and  a cornercorner with one P(4)CO3 tetrahedra. The Cu(4)-O(11) bond length is 1.94 Å. The Cu(4)-O(12) bond length is 1.95 Å. The Cu(4)-O(15) bond length is 2.42 Å. The Cu(4)-O(16) bond length is 2.50 Å. The Cu(4)-O(17) bond length is 2.07 Å. The Cu(4)-O(18) bond length is 2.07 Å. There are eight inequivalent C sites. In the first C site, C(1) is bonded in a distorted tetrahedral geometry to one C(3), one P(1), one P(3), and one O(13) atom. The C(1)-C(3) bond length is 1.52 Å. The C(1)-P(1) bond length is 1.85 Å. The C(1)-P(3) bond length is 1.85 Å. The C(1)-O(13) bond length is 1.45 Å. In the second C site, C(2) is bonded in a distorted tetrahedral geometry to one C(4), one P(2), one P(4), and one O(14) atom. The C(2)-C(4) bond length is 1.52 Å. The C(2)-P(2) bond length is 1.86 Å. The C(2)-P(4) bond length is 1.85 Å. The C(2)-O(14) bond length is 1.45 Å. In the third C site, C(3) is bonded in a trigonal non-coplanar geometry to one C(1), one H(11), one H(13), and one H(15) atom. The C(3)-H(11) bond length is 1.10 Å. The C(3)-H(13) bond length is 1.09 Å. The C(3)-H(15) bond length is 1.09 Å. In the fourth C site, C(4) is bonded in a trigonal non-coplanar geometry to one C(2), one H(12), one H(14), and one H(16) atom. The C(4)-H(12) bond length is 1.10 Å. The C(4)-H(14) bond length is 1.09 Å. The C(4)-H(16) bond length is 1.10 Å. In the fifth C site, C(5) is bonded in a distorted bent 120 degrees geometry to one C(8), one N(1), and one H(17) atom. The C(5)-C(8) bond length is 1.39 Å. The C(5)-N(1) bond length is 1.34 Å. The C(5)-H(17) bond length is 1.09 Å. In the sixth C site, C(6) is bonded in a distorted bent 120 degrees geometry to one C(7), one N(2), and one H(18) atom. The C(6)-C(7) bond length is 1.39 Å. The C(6)-N(2) bond length is 1.34 Å. The C(6)-H(18) bond length is 1.08 Å. In the seventh C site, C(7) is bonded in a distorted trigonal planar geometry to one C(6), one N(1), and one H(19) atom. The C(7)-N(1) bond length is 1.34 Å. The C(7)-H(19) bond length is 1.09 Å. In the eighth C site, C(8) is bonded in a distorted trigonal planar geometry to one C(5), one N(2), and one H(20) atom. The C(8)-N(2) bond length is 1.34 Å. The C(8)-H(20) bond length is 1.09 Å. There are four inequivalent P sites. In the first P site, P(1) is bonded to one C(1), one O(1), one O(3), and one O(5) atom to form PCO3 tetrahedra that share corners with two equivalent Cu(2)NO4 square pyramids and  a cornercorner with one P(3)CO3 tetrahedra. The P(1)-O(1) bond length is 1.57 Å. The P(1)-O(3) bond length is 1.53 Å. The P(1)-O(5) bond length is 1.52 Å. In the second P site, P(2) is bonded to one C(2), one O(2), one O(4), and one O(6) atom to form PCO3 tetrahedra that share corners with two equivalent Cu(3)NO4 square pyramids and  a cornercorner with one P(4)CO3 tetrahedra. The P(2)-O(2) bond length is 1.57 Å. The P(2)-O(4) bond length is 1.53 Å. The P(2)-O(6) bond length is 1.52 Å. In the third P site, P(3) is bonded to one C(1), one O(11), one O(7), and one O(9) atom to form PCO3 tetrahedra that share  a cornercorner with one Cu(4)O6 octahedra,  a cornercorner with one Cu(2)NO4 square pyramid, and  a cornercorner with one P(1)CO3 tetrahedra. The corner-sharing octahedral tilt angles are 51°. The P(3)-O(11) bond length is 1.53 Å. The P(3)-O(7) bond length is 1.55 Å. The P(3)-O(9) bond length is 1.55 Å. In the fourth P site, P(4) is bonded to one C(2), one O(10), one O(12), and one O(8) atom to form PCO3 tetrahedra that share  a cornercorner with one Cu(4)O6 octahedra,  a cornercorner with one Cu(3)NO4 square pyramid, and  a cornercorner with one P(2)CO3 tetrahedra. The corner-sharing octahedral tilt angles are 50°. The P(4)-O(10) bond length is 1.55 Å. The P(4)-O(12) bond length is 1.53 Å. The P(4)-O(8) bond length is 1.55 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(5), and one C(7) atom. In the second N site, N(2) is bonded in a trigonal planar geometry to one Cu(3), one C(6), and one C(8) atom. There are twenty inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(13) and one O(9) atom. The H(1)-O(13) bond length is 1.01 Å. The H(1)-O(9) bond length is 1.75 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(10) and one O(14) atom. The H(2)-O(10) bond length is 1.73 Å. The H(2)-O(14) bond length is 1.01 Å. In the third H site, H(3) is bonded in a single-bond geometry to one O(15) and one O(8) atom. The H(3)-O(15) bond length is 1.00 Å. The H(3)-O(8) bond length is 1.72 Å. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(16) and one O(7) atom. The H(4)-O(16) bond length is 1.00 Å. The H(4)-O(7) bond length is 1.71 Å. In the fifth H site, H(5) is bonded in a single-bond geometry to one O(15) atom. The H(5)-O(15) bond length is 0.99 Å. In the sixth H site, H(6) is bonded in a single-bond geometry to one O(16) atom. The H(6)-O(16) bond length is 0.99 Å. In the seventh H site, H(7) is bonded in a single-bond geometry to one O(17) atom. The H(7)-O(17) bond length is 0.99 Å. In the eighth H site, H(8) is bonded in a single-bond geometry to one O(18) atom. The H(8)-O(18) bond length is 0.99 Å. In the ninth H site, H(9) is bonded in a single-bond geometry to one O(17) atom. The H(9)-O(17) bond length is 0.99 Å. In the tenth H site, H(10) is bonded in a single-bond geometry to one O(18) atom. The H(10)-O(18) bond length is 0.99 Å. In the eleventh H site, H(11) is bonded in a single-bond geometry to one C(3) atom. In the twelfth H site, H(12) is bonded in a single-bond geometry to one C(4) atom. In the thirteenth H site, H(13) is bonded in a single-bond geometry to one C(3) atom. In the fourteenth H site, H(14) is bonded in a single-bond geometry to one C(4) atom. In the fifteenth H site, H(15) is bonded in a single-bond geometry to one C(3) atom. In the sixteenth H site, H(16) is bonded in a single-bond geometry to one C(4) atom. In the seventeenth H site, H(17) is bonded in a single-bond geometry to one C(5) atom. In the eighteenth H site, H(18) is bonded in a single-bond geometry to one C(6) atom. In the nineteenth H site, H(19) is bonded in a single-bond geometry to one C(7) atom. In the twentieth H site, H(20) is bonded in a single-bond geometry to one C(8) atom. There are eighteen inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to one Cu(1) and one P(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Cu(1) and one P(2) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Cu(2) and one P(1) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Cu(3) and one P(2) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one Cu(2) and one P(1) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one Cu(3) and one P(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Cu(1), one P(3), and one H(4) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Cu(1), one P(4), and one H(3) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one Cu(2), one P(3), and one H(1) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Cu(3), one P(4), and one H(2) atom. In the eleventh O site, O(11) is bonded in a bent 120 degrees geometry to one Cu(4) and one P(3) atom. In the twelfth O site, O(12) is bonded in a bent 120 degrees geometry to one Cu(4) and one P(4) atom. In the thirteenth O site, O(13) is bonded in a distorted water-like geometry to one Cu(1), one C(1), and one H(1) atom. In the fourteenth O site, O(14) is bonded in a distorted water-like geometry to one Cu(1), one C(2), and one H(2) atom. In the fifteenth O site, O(15) is bonded in a water-like geometry to one Cu(2), one Cu(4), one H(3), and one H(5) atom. In the sixteenth O site, O(16) is bonded in a water-like geometry to one Cu(3), one Cu(4), one H(4), and one H(6) atom. In the seventeenth O site, O(17) is bonded in a distorted water-like geometry to one Cu(4), one H(7), and one H(9) atom. In the eighteenth O site, O(18) is bonded in a distorted water-like geometry to one Cu(4), one H(10), and one H(8) atom. Linkers: 1 c1cnccn1 ,2 CC(O)(P([O])([O])=O)P([O])([O])=O. Metal clusters: 4 [Cu]. The MOF has largest included sphere 2.01 A, density 2.51 g/cm3, surface area 2614.85 m2/g, accessible volume 0.05 cm3/g