William G Van Der Sluys
Titanium(IV) chloride was reacted with a slight excess of barium penta-fluoro-phenoxide in tetra-hydro-furan (THF) solution. After filtration and solvent evaporation, the resulting orange crystalline material was obtained. The product was recrystallized by preparing a concentrated solution in THF at room tem-per-a-ture, followed by cooling to 253 K. The supernatant solution was deca-nted using a pipet, and the crystals were dried by allowing the solvent to evaporate in the atmosphere of a glovebox. It was possible to obtain good-quality X-ray data at 100 K on a crystal, namely, tetra-kis-(penta-fluoro-phenoxido-κO)bis-(tetra-hy-dro-furan-κO)titanium(IV), [Ti(C6F5O)4(C4H8O)2], having monoclinic (P21/n) symmetry. This com-pound adopts a solid-state structure in which the titanium(IV) ions have a distorted octa-hedral coordination environment with two coordinated THF mol-ecules occupying cis positions.