Pr2H9(C7O4)3(CO)3 crystallizes in the tetragonal I4_1 space group. The structure consists of twelve methanol molecules inside a Pr2H9(C7O4)3 framework. In the Pr2H9(C7O4)3 framework, Pr(1) is bonded in a 8-coordinate geometry to one O(2), one O(4), one O(6), one O(7), two equivalent O(1), and two equivalent O(3) atoms. The Pr(1)-O(2) bond length is 2.45 Å. The Pr(1)-O(4) bond length is 2.51 Å. The Pr(1)-O(6) bond length is 2.42 Å. The Pr(1)-O(7) bond length is 2.43 Å. There is one shorter (2.50 Å) and one longer (2.89 Å) Pr(1)-O(1) bond length. There is one shorter (2.50 Å) and one longer (2.87 Å) Pr(1)-O(3) bond length. There are eleven inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one C(2), one C(6), and one C(7) atom. The C(1)-C(2) bond length is 1.39 Å. The C(1)-C(6) bond length is 1.39 Å. The C(1)-C(7) bond length is 1.48 Å. In the second C site, C(2) is bonded in a distorted single-bond geometry to one C(1), one C(3), and one H(1) atom. The C(2)-C(3) bond length is 1.39 Å. The C(2)-H(1) bond length is 0.93 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one C(2), one C(4), and one C(8) atom. The C(3)-C(4) bond length is 1.39 Å. The C(3)-C(8) bond length is 1.48 Å. In the fourth C site, C(4) is bonded in a distorted single-bond geometry to one C(3) and one H(2) atom. The C(4)-H(2) bond length is 0.93 Å. In the fifth C site, C(6) is bonded in a distorted single-bond geometry to one C(1) and one H(3) atom. The C(6)-H(3) bond length is 0.93 Å. In the sixth C site, C(7) is bonded in a distorted bent 120 degrees geometry to one C(1), one O(1), and one O(2) atom. The C(7)-O(1) bond length is 1.24 Å. The C(7)-O(2) bond length is 1.26 Å. In the seventh C site, C(8) is bonded in a bent 120 degrees geometry to one C(3), one O(3), and one O(4) atom. The C(8)-O(3) bond length is 1.26 Å. The C(8)-O(4) bond length is 1.28 Å. In the eighth C site, C(9) is bonded in a trigonal planar geometry to one C(10), one C(11), and one C(13) atom. The C(9)-C(10) bond length is 1.39 Å. The C(9)-C(11) bond length is 1.50 Å. The C(9)-C(13) bond length is 1.39 Å. In the ninth C site, C(10) is bonded in a distorted single-bond geometry to one C(9) and one H(4) atom. The C(10)-H(4) bond length is 0.93 Å. In the tenth C site, C(11) is bonded in a distorted bent 120 degrees geometry to one C(9), one O(6), and one O(7) atom. The C(11)-O(6) bond length is 1.21 Å. The C(11)-O(7) bond length is 1.22 Å. In the eleventh C site, C(13) is bonded in a distorted single-bond geometry to two equivalent C(9) and one H(5) atom. The C(13)-H(5) bond length is 0.93 Å. There are five 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(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 single-bond geometry to one C(10) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(13) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to two equivalent Pr(1) and one C(7) atom. In the second O site, O(2) is bonded in a water-like geometry to one Pr(1) and one C(7) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to two equivalent Pr(1) and one C(8) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Pr(1) and one C(8) atom. In the fifth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Pr(1) and one C(11) atom. In the sixth O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Pr(1) and one C(11) atom. Linkers: 6 [O]C(=O)c1cc([O])cc(C([O])=O)c1. Metal clusters: 4 [Pr]. The MOF has largest included sphere 5.68 A, density 1.32 g/cm3, surface area 3143.17 m2/g, accessible volume 0.37 cm3/g