PrC7NH7O6 crystallizes in the monoclinic P2_1/c space group. Pr(1) is bonded in a 7-coordinate geometry to one N(1), one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom. The Pr(1)-N(1) bond length is 2.57 Å. The Pr(1)-O(1) bond length is 2.53 Å. The Pr(1)-O(2) bond length is 2.43 Å. The Pr(1)-O(3) bond length is 2.56 Å. The Pr(1)-O(4) bond length is 2.31 Å. The Pr(1)-O(5) bond length is 2.43 Å. The Pr(1)-O(6) bond length is 2.64 Å. There are seven inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(2), one O(4), and one O(5) atom. The C(1)-C(2) bond length is 1.44 Å. The C(1)-O(4) bond length is 1.29 Å. The C(1)-O(5) bond length is 1.31 Å. In the second C site, C(2) is bonded in a distorted trigonal planar geometry to one C(1), one C(3), and one N(1) atom. The C(2)-C(3) bond length is 1.41 Å. The C(2)-N(1) bond length is 1.39 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one C(2) and one H(1) atom. The C(3)-H(1) bond length is 1.09 Å. In the fourth C site, C(4) is bonded in a distorted single-bond geometry to one C(5) and one H(2) atom. The C(4)-C(5) bond length is 1.43 Å. The C(4)-H(2) bond length is 1.09 Å. In the fifth C site, C(5) is bonded in a trigonal planar geometry to one C(4), one C(6), and one C(7) atom. The C(5)-C(6) bond length is 1.41 Å. The C(5)-C(7) bond length is 1.45 Å. In the sixth C site, C(6) is bonded in a distorted bent 120 degrees geometry to one C(5), one N(1), and one H(3) atom. The C(6)-N(1) bond length is 1.33 Å. The C(6)-H(3) bond length is 1.09 Å. In the seventh C site, C(7) is bonded in a distorted bent 120 degrees geometry to one C(5), one O(2), and one O(3) atom. The C(7)-O(2) bond length is 1.28 Å. The C(7)-O(3) bond length is 1.33 Å. N(1) is bonded in a distorted trigonal planar geometry to one Pr(1), one C(2), and one C(6) atom. There are seven inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(3) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(4) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(6) atom. In the fourth H site, H(4) is bonded in a distorted linear geometry to one O(1) and one O(5) atom. The H(4)-O(1) bond length is 1.02 Å. The H(4)-O(5) bond length is 1.59 Å. In the fifth H site, H(5) is bonded in a single-bond geometry to one O(1) atom. The H(5)-O(1) bond length is 0.98 Å. In the sixth H site, H(6) is bonded in a single-bond geometry to one O(6) atom. The H(6)-O(6) bond length is 0.99 Å. In the seventh H site, H(7) is bonded in a distorted bent 150 degrees geometry to one O(3) and one O(6) atom. The H(7)-O(3) bond length is 1.58 Å. The H(7)-O(6) bond length is 1.02 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted water-like geometry to one Pr(1), one H(4), and one H(5) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one Pr(1) and one C(7) atom. In the third O site, O(3) is bonded in a distorted water-like geometry to one Pr(1), one C(7), and one H(7) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Pr(1) and one C(1) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Pr(1), one C(1), and one H(4) atom. In the sixth O site, O(6) is bonded in a water-like geometry to one Pr(1), one H(6), and one H(7) atom. Linkers: 4 [O]C(=O)c1ccc(C([O])=O)nc1. Metal clusters: 4 [Pr]. The MOF has largest included sphere 2.53 A, density 2.39 g/cm3, surface area 2437.02 m2/g, accessible volume 0.10 cm3/g