AgC5PH7O3 crystallizes in the monoclinic P2_1/c space group. Ag(1) is bonded in a 4-coordinate geometry to one C(4), one O(3), and two equivalent O(1) atoms. The Ag(1)-C(4) bond length is 2.38 Å. The Ag(1)-O(3) bond length is 2.31 Å. Both Ag(1)-O(1) bond lengths are 2.36 Å. There are five inequivalent C sites. In the first C site, C(1) is bonded in a distorted trigonal non-coplanar geometry to one C(2), one H(2), one H(3), and one H(4) atom. The C(1)-C(2) bond length is 1.50 Å. The C(1)-H(2) bond length is 1.10 Å. The C(1)-H(3) bond length is 1.10 Å. The C(1)-H(4) bond length is 1.09 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(4) atom. The C(2)-C(3) bond length is 1.41 Å. The C(2)-C(4) bond length is 1.42 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one C(2), one C(4), and one C(5) atom. The C(3)-C(4) bond length is 1.42 Å. The C(3)-C(5) bond length is 1.50 Å. In the fourth C site, C(4) is bonded in a distorted single-bond geometry to one Ag(1), one C(2), one C(3), and one H(5) atom. The C(4)-H(5) bond length is 1.09 Å. In the fifth C site, C(5) is bonded in a distorted water-like geometry to one C(3), one P(1), one H(6), and one H(7) atom. The C(5)-P(1) bond length is 1.82 Å. The C(5)-H(6) bond length is 1.10 Å. The C(5)-H(7) bond length is 1.10 Å. P(1) is bonded in a distorted tetrahedral geometry to one C(5), one O(1), one O(2), and one O(3) atom. The P(1)-O(1) bond length is 1.53 Å. The P(1)-O(2) bond length is 1.58 Å. The P(1)-O(3) bond length is 1.54 Å. There are seven inequivalent H sites. In the first H site, H(7) is bonded in a single-bond geometry to one C(5) atom. In the second H site, H(1) is bonded in a linear geometry to one O(2) and one O(3) atom. The H(1)-O(2) bond length is 1.04 Å. The H(1)-O(3) bond length is 1.47 Å. In the third H site, H(2) is bonded in a single-bond geometry to one C(1) atom. In the fourth H site, H(3) is bonded in a single-bond geometry to one C(1) atom. In the fifth H site, H(4) is bonded in a single-bond geometry to one C(1) atom. In the sixth H site, H(5) is bonded in a single-bond geometry to one C(4) atom. In the seventh H site, H(6) is bonded in a single-bond geometry to one C(5) atom. There are three inequivalent O sites. In the first O site, O(3) is bonded in a distorted trigonal planar geometry to one Ag(1), one P(1), and one H(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one P(1) and one H(1) atom. In the third O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Ag(1) and one P(1) atom. Linkers: 2 Cc1cc(CP([O])(=O)O)c(C)cc1CP([O])(=O)O ,2 Cc1cc(CP([O])(=O)O)c(C)cc1[CH]P([O])O. Metal clusters: 4 [Ag]. The MOF has largest included sphere 1.52 A, density 2.63 g/cm3, surface area 2760.18 m2/g, accessible volume 0.06 cm3/g