Ti2C2H4O9 crystallizes in the orthorhombic Cmce space group. Ti(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form distorted corner-sharing TiO6 octahedra. The corner-sharing octahedral tilt angles range from 0-32°. The Ti(1)-O(1) bond length is 2.14 Å. The Ti(1)-O(2) bond length is 2.24 Å. The Ti(1)-O(3) bond length is 1.83 Å. The Ti(1)-O(4) bond length is 1.82 Å. The Ti(1)-O(5) bond length is 1.82 Å. The Ti(1)-O(6) bond length is 2.17 Å. There are two inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to two equivalent O(1) atoms. Both C(1)-O(1) bond lengths are 1.26 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to two equivalent O(2) atoms. Both C(2)-O(2) bond lengths are 1.26 Å. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(2) and one O(6) atom. The H(1)-O(2) bond length is 1.71 Å. The H(1)-O(6) bond length is 0.99 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(6) atom. The H(2)-O(6) bond length is 0.97 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Ti(1) and one C(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Ti(1), one C(2), and one H(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to two equivalent Ti(1) atoms. In the fourth O site, O(4) is bonded in a linear geometry to two equivalent Ti(1) atoms. In the fifth O site, O(5) is bonded in a linear geometry to two equivalent Ti(1) atoms. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Ti(1), one H(1), and one H(2) atom. Linkers: 4 [O]C(=O)C([O])=O. Metal clusters: 8 [Ti]. The MOF has largest included sphere 3.25 A, density 2.24 g/cm3, surface area 2714.02 m2/g, accessible volume 0.07 cm3/g