PrC25H17(NO4)2 crystallizes in the triclinic P-1 space group. Pr(1) is bonded in a 9-coordinate geometry to one O(1), one O(2), one O(4), one O(5), one O(6), one O(7), one O(8), and two equivalent O(3) atoms. The Pr(1)-O(1) bond length is 2.43 Å. The Pr(1)-O(2) bond length is 2.51 Å. The Pr(1)-O(4) bond length is 2.54 Å. The Pr(1)-O(5) bond length is 2.50 Å. The Pr(1)-O(6) bond length is 2.49 Å. The Pr(1)-O(7) bond length is 2.63 Å. The Pr(1)-O(8) bond length is 2.61 Å. There is one shorter (2.43 Å) and one longer (2.67 Å) Pr(1)-O(3) bond length. There are twenty-five inequivalent C sites. In the first C site, C(1) is bonded in a distorted trigonal planar geometry to one C(10), one C(2), and one N(1) atom. The C(1)-C(10) bond length is 1.41 Å. The C(1)-C(2) bond length is 1.46 Å. The C(1)-N(1) bond length is 1.37 Å. In the second C site, C(2) is bonded in a distorted single-bond geometry to one C(1) and one H(1) atom. The C(2)-H(1) bond length is 1.08 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one C(4) and one H(2) atom. The C(3)-C(4) bond length is 1.46 Å. The C(3)-H(2) bond length is 1.08 Å. In the fourth C site, C(4) is bonded in a distorted trigonal planar geometry to one C(3), one C(5), and one N(1) atom. The C(4)-C(5) bond length is 1.41 Å. The C(4)-N(1) bond length is 1.37 Å. In the fifth C site, C(5) is bonded in a trigonal planar geometry to one C(18), one C(4), and one C(6) atom. The C(5)-C(18) bond length is 1.48 Å. The C(5)-C(6) bond length is 1.41 Å. In the sixth C site, C(6) is bonded in a distorted trigonal planar geometry to one C(5), one C(7), and one N(2) atom. The C(6)-C(7) bond length is 1.44 Å. The C(6)-N(2) 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) and one H(3) atom. The C(7)-H(3) bond length is 1.08 Å. In the eighth C site, C(8) is bonded in a distorted single-bond geometry to one C(9) and one H(4) atom. The C(8)-C(9) bond length is 1.43 Å. The C(8)-H(4) bond length is 1.08 Å. In the ninth C site, C(9) is bonded in a distorted trigonal planar geometry to one C(10), one C(8), and one N(2) atom. The C(9)-C(10) bond length is 1.40 Å. The C(9)-N(2) bond length is 1.38 Å. In the tenth C site, C(10) is bonded in a trigonal planar geometry to one C(1), one C(11), and one C(9) atom. The C(10)-C(11) bond length is 1.49 Å. In the eleventh C site, C(11) is bonded in a trigonal planar geometry to one C(10), one C(12), and one C(16) atom. The C(11)-C(12) bond length is 1.40 Å. The C(11)-C(16) bond length is 1.40 Å. In the twelfth C site, C(12) is bonded in a distorted trigonal planar geometry to one C(11), one C(13), and one H(6) atom. The C(12)-C(13) bond length is 1.39 Å. The C(12)-H(6) bond length is 1.09 Å. In the thirteenth C site, C(13) is bonded in a distorted trigonal planar geometry to one C(12), one C(14), and one H(7) atom. The C(13)-C(14) bond length is 1.40 Å. The C(13)-H(7) bond length is 1.09 Å. In the fourteenth C site, C(14) is bonded in a trigonal planar geometry to one C(13), one C(15), and one C(17) atom. The C(14)-C(15) bond length is 1.40 Å. The C(14)-C(17) bond length is 1.50 Å. In the fifteenth C site, C(15) is bonded in a distorted trigonal planar geometry to one C(14), one C(16), and one H(8) atom. The C(15)-C(16) bond length is 1.39 Å. The C(15)-H(8) bond length is 1.09 Å. In the sixteenth C site, C(16) is bonded in a distorted trigonal planar geometry to one C(11), one C(15), and one H(9) atom. The C(16)-H(9) bond length is 1.09 Å. In the seventeenth C site, C(17) is bonded in a bent 120 degrees geometry to one C(14), one O(1), and one O(2) atom. The C(17)-O(1) bond length is 1.27 Å. The C(17)-O(2) bond length is 1.28 Å. In the eighteenth C site, C(18) is bonded in a trigonal planar geometry to one C(19), one C(23), and one C(5) atom. The C(18)-C(19) bond length is 1.41 Å. The C(18)-C(23) bond length is 1.41 Å. In the nineteenth C site, C(19) is bonded in a distorted trigonal planar geometry to one C(18), one C(20), and one H(10) atom. The C(19)-C(20) bond length is 1.39 Å. The C(19)-H(10) bond length is 1.09 Å. In the twentieth C site, C(20) is bonded in a distorted trigonal planar geometry to one C(19), one C(21), and one H(11) atom. The C(20)-C(21) bond length is 1.40 Å. The C(20)-H(11) bond length is 1.09 Å. In the twenty-first C site, C(21) is bonded in a trigonal planar geometry to one C(20), one C(22), and one C(24) atom. The C(21)-C(22) bond length is 1.40 Å. The C(21)-C(24) bond length is 1.49 Å. In the twenty-second C site, C(22) is bonded in a distorted trigonal planar geometry to one C(21), one C(23), and one H(12) atom. The C(22)-C(23) bond length is 1.39 Å. The C(22)-H(12) bond length is 1.09 Å. In the twenty-third C site, C(23) is bonded in a distorted single-bond geometry to one C(18), one C(22), and one H(13) atom. The C(23)-H(13) bond length is 1.09 Å. In the twenty-fourth C site, C(24) is bonded in a bent 120 degrees geometry to one C(21), one O(3), and one O(4) atom. The C(24)-O(3) bond length is 1.29 Å. The C(24)-O(4) bond length is 1.27 Å. In the twenty-fifth C site, C(25) is bonded in a distorted bent 120 degrees geometry to one O(5) and one O(6) atom. The C(25)-O(5) bond length is 1.27 Å. The C(25)-O(6) bond length is 1.26 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a water-like geometry to one C(1) and one C(4) atom. In the second N site, N(2) is bonded in a trigonal planar geometry to one C(6), one C(9), and one H(5) atom. The N(2)-H(5) bond length is 1.02 Å. There are seventeen inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(2) 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(7) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(8) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one N(2) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(12) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(13) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one C(15) atom. In the ninth H site, H(9) is bonded in a single-bond geometry to one C(16) atom. In the tenth H site, H(10) is bonded in a single-bond geometry to one C(19) atom. In the eleventh H site, H(11) is bonded in a single-bond geometry to one C(20) atom. In the twelfth H site, H(12) is bonded in a single-bond geometry to one C(22) atom. In the thirteenth H site, H(13) is bonded in a single-bond geometry to one C(23) atom. In the fourteenth H site, H(14) is bonded in a single-bond geometry to one O(7) atom. The H(14)-O(7) bond length is 0.98 Å. In the fifteenth H site, H(15) is bonded in a single-bond geometry to one O(7) atom. The H(15)-O(7) bond length is 0.98 Å. In the sixteenth H site, H(16) is bonded in a single-bond geometry to one O(8) atom. The H(16)-O(8) bond length is 0.98 Å. In the seventeenth H site, H(17) is bonded in a single-bond geometry to one O(8) atom. The H(17)-O(8) bond length is 0.97 Å. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Pr(1) and one C(17) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Pr(1) and one C(17) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Pr(1) and one C(24) atom. In the fourth O site, O(4) is bonded in a distorted water-like geometry to one Pr(1) and one C(24) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Pr(1) and one C(25) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Pr(1) and one C(25) atom. In the seventh O site, O(7) is bonded in a water-like geometry to one Pr(1), one H(14), and one H(15) atom. In the eighth O site, O(8) is bonded in a water-like geometry to one Pr(1), one H(16), and one H(17) atom. Linkers: 1 [O]C(=O)C([O])=O ,1 [O]C(=O)c1ccc(-c2c3nc(c(-c4ccc(C([O])=O)cc4)c4ccc([nH]4)c(-c4ccc(C([O])=O)cc4)c4nc(c(-c5ccc(C([O])=O)cc5)c5ccc2[nH]5)C=C4)C=C3)cc1. Metal clusters: 2 [Pr]. The MOF has largest included sphere 6.12 A, density 1.05 g/cm3, surface area 3876.13 m2/g, accessible volume 0.60 cm3/g