Co3C12P2H6(NO5)2 crystallizes in the triclinic P-1 space group. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded in a see-saw-like geometry to one N(1), one O(7), and two equivalent O(3) atoms. The Co(1)-N(1) bond length is 2.14 Å. The Co(1)-O(7) bond length is 1.96 Å. There is one shorter (2.00 Å) and one longer (2.14 Å) Co(1)-O(3) bond length. In the second Co site, Co(2) is bonded to one N(2), one O(1), one O(2), and two equivalent O(8) atoms to form CoNO4 square pyramids that share corners with two equivalent P(1)CO3 tetrahedra, corners with two equivalent P(2)CO3 tetrahedra, and  an edgeedge with one Co(2)NO4 square pyramid. The Co(2)-N(2) bond length is 2.10 Å. The Co(2)-O(1) bond length is 2.09 Å. The Co(2)-O(2) bond length is 2.04 Å. There is one shorter (2.12 Å) and one longer (2.17 Å) Co(2)-O(8) bond length. In the third Co site, Co(3) is bonded in a linear geometry to one O(10) and one O(4) atom. The Co(3)-O(10) bond length is 2.07 Å. The Co(3)-O(4) bond length is 2.10 Å. There are twelve inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(2), one N(1), and one H(1) atom. The C(1)-C(2) bond length is 1.39 Å. The C(1)-N(1) bond length is 1.34 Å. The C(1)-H(1) bond length is 0.95 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one C(1), one C(3), and one P(1) atom. The C(2)-C(3) bond length is 1.39 Å. The C(2)-P(1) bond length is 1.81 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one C(2), one C(4), and one H(2) atom. The C(3)-C(4) bond length is 1.39 Å. The C(3)-H(2) bond length is 0.95 Å. In the fourth 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 1.39 Å. The C(4)-C(6) bond length is 1.51 Å. In the fifth C site, C(5) is bonded in a distorted bent 120 degrees geometry to one C(4), one N(1), and one H(3) atom. The C(5)-N(1) bond length is 1.34 Å. The C(5)-H(3) bond length is 0.95 Å. In the sixth C site, C(6) is bonded in a distorted bent 120 degrees geometry to one C(4), one O(4), and one O(5) atom. The C(6)-O(4) bond length is 1.27 Å. The C(6)-O(5) bond length is 1.26 Å. In the seventh C site, C(7) is bonded in a distorted bent 120 degrees geometry to one C(8), one N(2), and one H(4) atom. The C(7)-C(8) bond length is 1.39 Å. The C(7)-N(2) bond length is 1.35 Å. The C(7)-H(4) bond length is 0.95 Å. In the eighth C site, C(8) is bonded in a trigonal planar geometry to one C(7), one C(9), and one P(2) atom. The C(8)-C(9) bond length is 1.40 Å. The C(8)-P(2) bond length is 1.82 Å. In the ninth C site, C(9) is bonded in a distorted single-bond geometry to one C(10), one C(8), and one H(5) atom. The C(9)-C(10) bond length is 1.39 Å. The C(9)-H(5) bond length is 0.95 Å. In the tenth C site, C(10) is bonded in a trigonal planar geometry to one C(11), one C(12), and one C(9) atom. The C(10)-C(11) bond length is 1.38 Å. The C(10)-C(12) bond length is 1.51 Å. In the eleventh C site, C(11) is bonded in a distorted bent 120 degrees geometry to one C(10), one N(2), and one H(6) atom. The C(11)-N(2) bond length is 1.33 Å. The C(11)-H(6) bond length is 0.95 Å. In the twelfth C site, C(12) is bonded in a distorted bent 120 degrees geometry to one C(10), one O(10), and one O(9) atom. The C(12)-O(10) bond length is 1.27 Å. The C(12)-O(9) bond length is 1.25 Å. There are two inequivalent P sites. In the first P site, P(1) is bonded to one C(2), one O(1), one O(2), and one O(3) atom to form distorted PCO3 tetrahedra that share corners with two equivalent Co(2)NO4 square pyramids. The P(1)-O(1) bond length is 1.52 Å. The P(1)-O(2) bond length is 1.51 Å. The P(1)-O(3) bond length is 1.55 Å. In the second P site, P(2) is bonded to one C(8), one O(6), one O(7), and one O(8) atom to form distorted PCO3 tetrahedra that share corners with two equivalent Co(2)NO4 square pyramids. The P(2)-O(6) bond length is 1.53 Å. The P(2)-O(7) bond length is 1.52 Å. The P(2)-O(8) bond length is 1.52 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one Co(1), one C(1), and one C(5) atom. In the second N site, N(2) is bonded in a trigonal planar geometry to one Co(2), one C(11), and one C(7) atom. There are six 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(3) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(5) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(7) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(9) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(11) atom. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Co(2) and one P(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Co(2) and one P(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Co(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Co(3) and one C(6) atom. In the fifth O site, O(5) is bonded in a single-bond geometry to one C(6) atom. In the sixth O site, O(6) is bonded in a single-bond geometry to one P(2) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Co(1) and one P(2) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to two equivalent Co(2) and one P(2) atom. In the ninth O site, O(9) is bonded in a single-bond geometry to one C(12) atom. In the tenth O site, O(10) is bonded in a distorted bent 120 degrees geometry to one Co(3) and one C(12) atom. Linkers: 4 [O]C(=O)c1cncc(P([O])([O])=O)c1. Metal clusters: 4 [Co] ,2 O=[C]O[Co]O[C]=O. The MOF has largest included sphere 4.70 A, density 1.73 g/cm3, surface area 3191.22 m2/g, accessible volume 0.25 cm3/g