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Titanium tetraiodide

CHCl3 CS2 corrosive Titanium(IV) chloride Titanium(IV) fluoride Zirconium(IV) iodide Hafnium(IV) iodide

Titanium tetraiodide is an inorganic compound with the formula TiI4. It is a black volatile solid, first reported by Rudolph Weber in 1863.

Physical properties

TiI4 is a rare molecular binary metal iodide, consisting of isolated molecules of tetrahedral Ti(IV) centers. The Ti-I distances are 261 pm.

Two polymorphs of TiI4 exist, one of which is highly soluble in organic solvents. In the less soluble cubic form, the Ti-I distances are 261 pm.

Production

Three methods are well known:

From the elements, typically using a tube furnace at 425 °C:

This reaction can be reversed to produce highly pure films of Ti metal. 2) Exchange reaction from titanium tetrachloride and HI. ::TiCl4 + 4 HI → TiI4 + 4 HCl 3) Oxide-iodide exchange from aluminium iodide. ::3 TiO2 + 4 AlI3 → 3 TiI4 + 2 Al2O3 ## Reactions Like TiCl4 and TiBr4, TiI4 forms adducts with Lewis bases, and it can also be reduced. When the reduction is conducted in the presence of Ti metal, one obtains polymeric Ti(III) and Ti(II) derivatives such as CsTi2I7 and the chain CsTiI3, respectively. TiI4 exhibits extensive reactivity toward alkenes and alkynes resulting in organoiodine derivatives. It also effects pinacol couplings and other C-C bond-forming reactions. | doi-access =free ## References ## References 1. ["Titanium tetraiodide"](https://pubchem.ncbi.nlm.nih.gov/compound/111328#section=Safety-and-Hazards). ::callout[type=info title="Wikipedia Source"] This article was imported from [Wikipedia](https://en.wikipedia.org/wiki/Titanium_tetraiodide) and is available under the [Creative Commons Attribution-ShareAlike 4.0 License](https://creativecommons.org/licenses/by-sa/4.0/). Content has been adapted to SurfDoc format. Original contributors can be found on the [article history page](https://en.wikipedia.org/wiki/Titanium_tetraiodide?action=history). ::

titanium(iv)-compounds iodides titanium-halides

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