Pr2Co3C40H16(NO3)8 crystallizes in the monoclinic P2_1/c space group. Pr(1) is bonded in a 8-coordinate geometry to one O(12), one O(6), one O(7), one O(8), two equivalent O(10), and two equivalent O(11) atoms. The Pr(1)-O(12) bond length is 2.44 Å. The Pr(1)-O(6) bond length is 2.35 Å. The Pr(1)-O(7) bond length is 2.37 Å. The Pr(1)-O(8) bond length is 2.40 Å. There is one shorter (2.53 Å) and one longer (2.62 Å) Pr(1)-O(10) bond length. There is one shorter (2.44 Å) and one longer (2.65 Å) Pr(1)-O(11) bond length. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a square pyramidal geometry to one N(3), one O(3), one O(4), one O(5), and one O(9) atom. The Co(1)-N(3) bond length is 2.14 Å. The Co(1)-O(3) bond length is 2.10 Å. The Co(1)-O(4) bond length is 2.11 Å. The Co(1)-O(5) bond length is 2.02 Å. The Co(1)-O(9) bond length is 2.08 Å. In the second Co site, Co(2) is bonded in an octahedral geometry to two equivalent N(1), two equivalent O(1), and two equivalent O(2) atoms. Both Co(2)-N(1) bond lengths are 2.12 Å. Both Co(2)-O(1) bond lengths are 2.12 Å. Both Co(2)-O(2) bond lengths are 2.10 Å. There are twenty inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one O(2) and one O(4) atom. The C(1)-O(2) bond length is 1.26 Å. The C(1)-O(4) bond length is 1.25 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one O(1) and one O(3) atom. The C(2)-O(1) bond length is 1.27 Å. The C(2)-O(3) bond length is 1.24 Å. In the third C site, C(3) is bonded in a distorted bent 120 degrees geometry to one C(4), one O(5), and one O(6) atom. The C(3)-C(4) bond length is 1.50 Å. The C(3)-O(5) bond length is 1.25 Å. The C(3)-O(6) bond length is 1.26 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(9) atom. The C(4)-C(5) bond length is 1.38 Å. The C(4)-C(9) bond length is 1.42 Å. In the fifth C site, C(5) is bonded in a distorted single-bond geometry to one C(4), one C(6), and one H(1) atom. The C(5)-C(6) bond length is 1.39 Å. The C(5)-H(1) bond length is 0.95 Å. In the sixth C site, C(6) is bonded in a distorted single-bond geometry to one C(5), one C(7), and one N(1) atom. The C(6)-C(7) bond length is 1.41 Å. The C(6)-N(1) bond length is 1.38 Å. In the seventh C site, C(7) is bonded in a distorted single-bond geometry to one C(6), one C(8), and one N(2) atom. The C(7)-C(8) bond length is 1.38 Å. The C(7)-N(2) bond length is 1.38 Å. In the eighth C site, C(8) is bonded in a distorted single-bond geometry to one C(7), one C(9), and one H(2) atom. The C(8)-C(9) bond length is 1.38 Å. The C(8)-H(2) bond length is 0.95 Å. In the ninth C site, C(9) is bonded in a trigonal planar geometry to one C(10), one C(4), and one C(8) atom. The C(9)-C(10) bond length is 1.49 Å. In the tenth C site, C(10) is bonded in a distorted bent 120 degrees geometry to one C(9), one O(7), and one O(8) atom. The C(10)-O(7) bond length is 1.26 Å. The C(10)-O(8) bond length is 1.26 Å. In the eleventh C site, C(11) is bonded in a trigonal planar geometry to one N(1), one N(2), and one H(3) atom. The C(11)-N(1) bond length is 1.31 Å. The C(11)-N(2) bond length is 1.33 Å. The C(11)-H(3) 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(13), one O(10), and one O(9) atom. The C(12)-C(13) bond length is 1.51 Å. The C(12)-O(10) bond length is 1.28 Å. The C(12)-O(9) bond length is 1.24 Å. In the thirteenth C site, C(13) is bonded in a trigonal planar geometry to one C(12), one C(14), and one C(18) atom. The C(13)-C(14) bond length is 1.38 Å. The C(13)-C(18) bond length is 1.43 Å. In the fourteenth C site, C(14) is bonded in a distorted single-bond geometry to one C(13), one C(15), and one H(4) atom. The C(14)-C(15) bond length is 1.39 Å. The C(14)-H(4) bond length is 0.95 Å. In the fifteenth C site, C(15) is bonded in a distorted single-bond geometry to one C(14), one C(16), and one N(4) atom. The C(15)-C(16) bond length is 1.41 Å. The C(15)-N(4) bond length is 1.37 Å. In the sixteenth C site, C(16) is bonded in a distorted trigonal planar geometry to one C(15), one C(17), and one N(3) atom. The C(16)-C(17) bond length is 1.39 Å. The C(16)-N(3) bond length is 1.40 Å. In the seventeenth C site, C(17) is bonded in a distorted single-bond geometry to one C(16), one C(18), and one H(5) atom. The C(17)-C(18) bond length is 1.39 Å. The C(17)-H(5) bond length is 0.95 Å. In the eighteenth C site, C(18) is bonded in a trigonal planar geometry to one C(13), one C(17), and one C(19) atom. The C(18)-C(19) bond length is 1.49 Å. In the nineteenth C site, C(19) is bonded in a distorted bent 120 degrees geometry to one C(18), one O(11), and one O(12) atom. The C(19)-O(11) bond length is 1.28 Å. The C(19)-O(12) bond length is 1.26 Å. In the twentieth C site, C(20) is bonded in a trigonal planar geometry to one N(3), one N(4), and one H(6) atom. The C(20)-N(3) bond length is 1.32 Å. The C(20)-N(4) bond length is 1.35 Å. The C(20)-H(6) bond length is 0.95 Å. There are four inequivalent N sites. In the first N site, N(1) is bonded in a distorted trigonal planar geometry to one Co(2), one C(11), and one C(6) atom. In the second N site, N(2) is bonded in a distorted trigonal planar geometry to one C(11), one C(7), and one H(7) atom. The N(2)-H(7) bond length is 0.88 Å. In the third N site, N(3) is bonded in a trigonal planar geometry to one Co(1), one C(16), and one C(20) atom. In the fourth N site, N(4) is bonded in a distorted trigonal planar geometry to one C(15), one C(20), and one H(8) atom. The N(4)-H(8) bond length is 0.88 Å. There are eight inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(5) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(8) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(11) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(14) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(17) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(20) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one N(2) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one N(4) atom. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a water-like geometry to one Co(2) and one C(2) atom. In the second O site, O(2) is bonded in a water-like geometry to one Co(2) and one C(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Co(1) and one C(2) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Co(1) and one C(1) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Co(1) and one C(3) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 degrees geometry to one Pr(1) and one C(3) atom. In the seventh O site, O(7) is bonded in a 2-coordinate geometry to one Pr(1) and one C(10) atom. In the eighth O site, O(8) is bonded in a distorted bent 120 degrees geometry to one Pr(1) and one C(10) atom. In the ninth O site, O(9) is bonded in a distorted bent 150 degrees geometry to one Co(1) and one C(12) atom. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to two equivalent Pr(1) and one C(12) atom. In the eleventh O site, O(11) is bonded in a distorted single-bond geometry to two equivalent Pr(1) and one C(19) atom. In the twelfth O site, O(12) is bonded in a distorted water-like geometry to one Pr(1) and one C(19) atom. Linkers: 8 [O]C(=O)c1cc2nc[nH]c2cc1C([O])=O ,4 [O]C(=O)C([O])=O. Metal clusters: 4 [Pr] ,6 [Co]. The MOF has largest included sphere 5.15 A, density 2.00 g/cm3, surface area 2707.09 m2/g, accessible volume 0.15 cm3/g