CoC8PN3H8O4 crystallizes in the monoclinic P2_1 space group. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one N(1), one N(3), one O(1), one O(3), and one O(5) atom to form CoN2O3 trigonal bipyramids that share corners with two equivalent P(1)CO3 tetrahedra. The Co(1)-N(1) bond length is 2.13 Å. The Co(1)-N(3) bond length is 2.08 Å. The Co(1)-O(1) bond length is 1.96 Å. The Co(1)-O(3) bond length is 2.04 Å. The Co(1)-O(5) bond length is 1.96 Å. In the second Co site, Co(2) is bonded to one N(2), one N(4), one O(2), one O(4), and one O(6) atom to form CoN2O3 trigonal bipyramids that share corners with two equivalent P(2)CO3 tetrahedra. The Co(2)-N(2) bond length is 2.13 Å. The Co(2)-N(4) bond length is 2.07 Å. The Co(2)-O(2) bond length is 1.96 Å. The Co(2)-O(4) bond length is 2.04 Å. The Co(2)-O(6) bond length is 1.96 Å. There are eleven inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one C(11,12); one C(3,4); and one P(1) atom. The C(1)-C(11,12) bond length is 1.40 Å. The C(1)-C(3,4) bond length is 1.40 Å. The C(1)-P(1) bond length is 1.82 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one C(11,12); one C(3,4); and one P(2) atom. The C(2)-C(11,12) bond length is 1.40 Å. The C(2)-C(3,4) bond length is 1.40 Å. The C(2)-P(2) bond length is 1.82 Å. In the third C site, C(3,4) is bonded in a distorted single-bond geometry to one C(1); one C(5,6); and one H(1,2) atom. The C(3,4)-C(5,6) bond length is 1.39 Å. The C(3,4)-H(1,2) bond length is 1.09 Å. In the fourth C site, C(5,6) is bonded in a distorted trigonal planar geometry to one C(3,4); one C(7,8); and one H(3,4) atom. The C(5,6)-C(7,8) bond length is 1.40 Å. The C(5,6)-H(3,4) bond length is 1.09 Å. In the fifth C site, C(7,8) is bonded in a distorted trigonal planar geometry to one C(5,6); one C(9,10); and one N(5,6) atom. The C(7,8)-C(9,10) bond length is 1.40 Å. The C(7,8)-N(5,6) bond length is 1.42 Å. In the sixth C site, C(9,10) is bonded in a distorted single-bond geometry to one C(7,8) and one H(5,6) atom. The C(9,10)-H(5,6) bond length is 1.09 Å. In the seventh C site, C(11,12) is bonded in a distorted single-bond geometry to one C(1) and one H(7,8) atom. The C(11,12)-H(7,8) bond length is 1.09 Å. In the eighth C site, C(13) is bonded in a trigonal planar geometry to one N(3); one N(5,6); and one H(9,10) atom. The C(13)-N(3) bond length is 1.32 Å. The C(13)-N(5,6) bond length is 1.37 Å. The C(13)-H(9,10) bond length is 1.09 Å. In the ninth C site, C(14) is bonded in a trigonal planar geometry to one N(4); one N(5,6); and one H(9,10) atom. The C(14)-N(4) bond length is 1.32 Å. The C(14)-N(5,6) bond length is 1.37 Å. The C(14)-H(9,10) bond length is 1.09 Å. In the tenth C site, C(15) is bonded in a trigonal planar geometry to one N(1); one N(5,6); and one H(11,12) atom. The C(15)-N(1) bond length is 1.32 Å. The C(15)-N(5,6) bond length is 1.37 Å. The C(15)-H(11,12) bond length is 1.08 Å. In the eleventh C site, C(16) is bonded in a trigonal planar geometry to one N(2); one N(5,6); and one H(11,12) atom. The C(16)-N(2) bond length is 1.32 Å. The C(16)-N(5,6) bond length is 1.37 Å. The C(16)-H(11,12) bond length is 1.08 Å. There are two 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(7) atom to form distorted PCO3 tetrahedra that share corners with two equivalent Co(1)N2O3 trigonal bipyramids. The P(1)-O(1) bond length is 1.55 Å. The P(1)-O(3) bond length is 1.55 Å. The P(1)-O(7) 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(8) atom to form distorted PCO3 tetrahedra that share corners with two equivalent Co(2)N2O3 trigonal bipyramids. The P(2)-O(2) bond length is 1.55 Å. The P(2)-O(4) bond length is 1.55 Å. The P(2)-O(8) bond length is 1.52 Å. There are five inequivalent N sites. In the first N site, N(1) is bonded in a distorted trigonal planar geometry to one Co(1), one C(15), and one N(3) atom. The N(1)-N(3) bond length is 1.38 Å. In the second N site, N(2) is bonded in a distorted trigonal planar geometry to one Co(2), one C(16), and one N(4) atom. The N(2)-N(4) bond length is 1.38 Å. In the third N site, N(3) is bonded in a 3-coordinate geometry to one Co(1), one C(13), and one N(1) atom. In the fourth N site, N(4) is bonded in a 3-coordinate geometry to one Co(2), one C(14), and one N(2) atom. In the fifth N site, N(5,6) is bonded in a trigonal planar geometry to one C(13); one C(15); and one C(7,8) atom. There are ten inequivalent H sites. In the first H site, H(1,2) is bonded in a single-bond geometry to one C(3,4) atom. In the second H site, H(3,4) is bonded in a single-bond geometry to one C(5,6) atom. In the third H site, H(5,6) is bonded in a single-bond geometry to one C(9,10) atom. In the fourth H site, H(7,8) is bonded in a single-bond geometry to one C(11,12) atom. In the fifth H site, H(9,10) is bonded in a single-bond geometry to one C(13) atom. In the sixth H site, H(11,12) is bonded in a single-bond geometry to one C(15) atom. In the seventh H site, H(13) is bonded in a distorted single-bond geometry to one O(3) and one O(5) atom. The H(13)-O(3) bond length is 1.66 Å. The H(13)-O(5) bond length is 1.00 Å. In the eighth H site, H(14) is bonded in a distorted single-bond geometry to one O(4) and one O(6) atom. The H(14)-O(4) bond length is 1.66 Å. The H(14)-O(6) bond length is 1.00 Å. In the ninth H site, H(15) is bonded in a linear geometry to one O(5) and one O(8) atom. The H(15)-O(5) bond length is 1.03 Å. The H(15)-O(8) bond length is 1.54 Å. In the tenth H site, H(16) is bonded in a linear geometry to one O(6) and one O(7) atom. The H(16)-O(6) bond length is 1.03 Å. The H(16)-O(7) bond length is 1.54 Å. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Co(1) and one P(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Co(2) and one P(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Co(1), one P(1), and one H(13) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Co(2), one P(2), and one H(14) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Co(1), one H(13), and one H(15) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Co(2), one H(14), and one H(16) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one P(1) and one H(16) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one P(2) and one H(15) atom. Linkers: 4 [O]P([O])(=O)c1ccc(-n2cnnc2)cc1. Metal clusters: 4 [Co]. The MOF has largest included sphere 1.66 A, density 2.08 g/cm3, surface area 3193.83 m2/g, accessible volume 0.04 cm3/g