InH9(C2O)6 crystallizes in the monoclinic Pc space group. In(1) is bonded to one O(2), one O(3), one O(4), one O(5), one O(6), and two equivalent O(1) atoms to form corner-sharing InO7 pentagonal bipyramids. The In(1)-O(2) bond length is 2.39 Å. The In(1)-O(3) bond length is 2.38 Å. The In(1)-O(4) bond length is 2.28 Å. The In(1)-O(5) bond length is 2.40 Å. The In(1)-O(6) bond length is 2.21 Å. There is one shorter (2.11 Å) and one longer (2.12 Å) In(1)-O(1) bond length. There are twelve inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(3), one O(2), and one O(4) atom. The C(1)-C(3) bond length is 1.48 Å. The C(1)-O(2) bond length is 1.27 Å. The C(1)-O(4) bond length is 1.30 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one C(4), one O(3), and one O(5) atom. The C(2)-C(4) bond length is 1.48 Å. The C(2)-O(3) bond length is 1.27 Å. The C(2)-O(5) bond length is 1.30 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one C(1), one C(11), and one C(5) atom. The C(3)-C(11) bond length is 1.39 Å. The C(3)-C(5) bond length is 1.42 Å. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one C(12), one C(2), and one C(6) atom. The C(4)-C(12) bond length is 1.39 Å. The C(4)-C(6) bond length is 1.42 Å. In the fifth C site, C(5) is bonded in a distorted trigonal planar geometry to one C(3), one C(7), and one H(1) atom. The C(5)-C(7) bond length is 1.37 Å. The C(5)-H(1) bond length is 1.09 Å. In the sixth C site, C(6) is bonded in a distorted trigonal planar geometry to one C(4), one C(8), and one H(2) atom. The C(6)-C(8) bond length is 1.37 Å. The C(6)-H(2) bond length is 1.09 Å. In the seventh C site, C(7) is bonded in a distorted single-bond geometry to one C(5), one C(9), and one H(3) atom. The C(7)-C(9) bond length is 1.42 Å. The C(7)-H(3) bond length is 1.09 Å. In the eighth C site, C(8) is bonded in a distorted single-bond geometry to one C(6), one C(9), and one H(4) atom. The C(8)-C(9) bond length is 1.42 Å. The C(8)-H(4) bond length is 1.09 Å. In the ninth C site, C(9) is bonded in a trigonal planar geometry to one C(10), one C(7), and one C(8) atom. The C(9)-C(10) bond length is 1.44 Å. In the tenth C site, C(10) is bonded in a trigonal planar geometry to one C(11), one C(12), and one C(9) atom. The C(10)-C(11) bond length is 1.42 Å. The C(10)-C(12) bond length is 1.42 Å. In the eleventh C site, C(11) is bonded in a distorted single-bond geometry to one C(10), one C(3), and one H(5) atom. The C(11)-H(5) bond length is 1.09 Å. In the twelfth C site, C(12) is bonded in a distorted single-bond geometry to one C(10), one C(4), and one H(6) atom. The C(12)-H(6) bond length is 1.09 Å. There are nine 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(6) 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 C(11) 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 O(1) atom. The H(7)-O(1) bond length is 0.98 Å. In the eighth H site, H(8) is bonded in a single-bond geometry to one O(6) atom. The H(8)-O(6) bond length is 0.99 Å. In the ninth H site, H(9) is bonded in a single-bond geometry to one O(4) and one O(6) atom. The H(9)-O(4) bond length is 1.73 Å. The H(9)-O(6) bond length is 0.99 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent In(1) and one H(7) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one In(1) and one C(1) atom. In the third O site, O(3) is bonded in a distorted L-shaped geometry to one In(1) and one C(2) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one In(1), one C(1), and one H(9) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one In(1) and one C(2) atom. In the sixth O site, O(6) is bonded in a distorted water-like geometry to one In(1), one H(8), and one H(9) atom. Linkers: 1 [O]C(=O)c1ccc2ccc(C([O])=O)cc2c1. Metal clusters: 2 [In]. The MOF has largest included sphere 1.55 A, density 2.18 g/cm3, surface area 3385.64 m2/g, accessible volume 0.06 cm3/g