Pr2B5H(CO7)2(CH3)2 crystallizes in the monoclinic Cc space group. The structure consists of eight 02329_fluka molecules inside a Pr2B5H(CO7)2 framework. In the Pr2B5H(CO7)2 framework, there are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 9-coordinate geometry to one O(1), one O(10), one O(12), one O(14), one O(3), one O(6), one O(7), one O(8), and one O(9) atom. The Pr(1)-O(1) bond length is 2.68 Å. The Pr(1)-O(10) bond length is 2.58 Å. The Pr(1)-O(12) bond length is 2.55 Å. The Pr(1)-O(14) bond length is 2.38 Å. The Pr(1)-O(3) bond length is 2.45 Å. The Pr(1)-O(6) bond length is 2.52 Å. The Pr(1)-O(7) bond length is 2.67 Å. The Pr(1)-O(8) bond length is 2.53 Å. The Pr(1)-O(9) bond length is 2.50 Å. In the second Pr site, Pr(2) is bonded in a 9-coordinate geometry to one O(12), one O(13), one O(2), one O(5), one O(7), two equivalent O(11), and two equivalent O(4) atoms. The Pr(2)-O(12) bond length is 2.90 Å. The Pr(2)-O(13) bond length is 2.45 Å. The Pr(2)-O(2) bond length is 2.46 Å. The Pr(2)-O(5) bond length is 2.53 Å. The Pr(2)-O(7) bond length is 2.69 Å. There is one shorter (2.65 Å) and one longer (2.78 Å) Pr(2)-O(11) bond length. There is one shorter (2.33 Å) and one longer (2.62 Å) Pr(2)-O(4) bond length. There are five inequivalent B sites. In the first B site, B(1) is bonded to one O(1), one O(10), one O(2), and one O(3) atom to form corner-sharing BO4 tetrahedra. The B(1)-O(1) bond length is 1.47 Å. The B(1)-O(10) bond length is 1.48 Å. The B(1)-O(2) bond length is 1.48 Å. The B(1)-O(3) bond length is 1.46 Å. In the second B site, B(2) is bonded in a trigonal planar geometry to one O(2), one O(4), and one O(5) atom. The B(2)-O(2) bond length is 1.40 Å. The B(2)-O(4) bond length is 1.34 Å. The B(2)-O(5) bond length is 1.39 Å. In the third B site, B(3) is bonded to one O(3), one O(5), one O(6), and one O(7) atom to form corner-sharing BO4 tetrahedra. The B(3)-O(3) bond length is 1.46 Å. The B(3)-O(5) bond length is 1.49 Å. The B(3)-O(6) bond length is 1.48 Å. The B(3)-O(7) bond length is 1.47 Å. In the fourth B site, B(4) is bonded in a trigonal planar geometry to one O(1), one O(6), and one O(8) atom. The B(4)-O(1) bond length is 1.36 Å. The B(4)-O(6) bond length is 1.38 Å. The B(4)-O(8) bond length is 1.37 Å. In the fifth B site, B(5) is bonded to one O(10), one O(7), one O(8), and one O(9) atom to form corner-sharing BO4 tetrahedra. The B(5)-O(10) bond length is 1.44 Å. The B(5)-O(7) bond length is 1.49 Å. The B(5)-O(8) bond length is 1.50 Å. The B(5)-O(9) bond length is 1.50 Å. There are two inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one O(11) and one O(12) atom. The C(1)-O(11) bond length is 1.28 Å. The C(1)-O(12) bond length is 1.28 Å. In the second C site, C(3) is bonded in a distorted bent 120 degrees geometry to one O(13) and one O(14) atom. The C(3)-O(13) bond length is 1.26 Å. The C(3)-O(14) bond length is 1.29 Å. H(7) is bonded in a single-bond geometry to one O(9) atom. The H(7)-O(9) bond length is 0.97 Å. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Pr(1), one B(1), and one B(4) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Pr(2), one B(1), and one B(2) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Pr(1), one B(1), and one B(3) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to two equivalent Pr(2) and one B(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Pr(2), one B(2), and one B(3) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Pr(1), one B(3), and one B(4) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Pr(1), one Pr(2), one B(3), and one B(5) atom. In the eighth O site, O(8) is bonded in a distorted bent 120 degrees geometry to one Pr(1), one B(4), and one B(5) atom. In the ninth O site, O(9) is bonded in a distorted bent 120 degrees geometry to one Pr(1), one B(5), and one H(7) atom. In the tenth O site, O(10) is bonded in a distorted bent 120 degrees geometry to one Pr(1), one B(1), and one B(5) atom. In the eleventh O site, O(11) is bonded in a single-bond geometry to two equivalent Pr(2) and one C(1) atom. In the twelfth O site, O(12) is bonded in a distorted single-bond geometry to one Pr(1), one Pr(2), and one C(1) atom. In the thirteenth O site, O(13) is bonded in a distorted bent 120 degrees geometry to one Pr(2) and one C(3) atom. In the fourteenth O site, O(14) is bonded in a distorted bent 150 degrees geometry to one Pr(1) and one C(3) atom. Linkers: 1 [H].[H].[H].[H].[H].[H].[H].[H].[H].[H].[H].[H].[H].[B]O[B]O[B](=O)[O].[O][B][O].[O][B][O].[O][B][O].[O][B][O].[B][O].[B][O].[B][O].[B][O].[B][O].[B][O].[B][O].[B][O].[B][O].[B][O].[B]=O.[B]=O.[B]=O.[B]=O.[B]=O.[B]=O.[B]=O.[B]=O.[B]=O.[B]=O.[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[OH].[OH].[OH].[OH].[OH] ,4 CC([O])=O. Metal clusters: 4 [Pr]. The MOF has largest included sphere 2.71 A, density 2.92 g/cm3, surface area 1737.09 m2/g, accessible volume 0.05 cm3/g