Titanium tetraiodide

Tetraiodide

Red-brown solid

Fixed

4.3 g · cm -3 ( 25 ° C)

150 ° C.

377 ° C

Dissolves in water to hydrolytic decomposition

Risk

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Titanium (IV ) iodide is an inorganic chemical compound of titanium selected from the group of iodides.

Production and representation

Titanium (IV ) iodide can be obtained by reaction of titanium with iodine.

Alternatively, it may by means of aluminum (III) iodide, titanium oxide

Are obtained, or by reaction of titanium ( IV) chloride with hydrogen iodide.

Properties

Titanium (IV ) iodide is a red-brown, fuming strongly in the air solid. It crystallizes in the space group Pa3 octahedral (a = 1202 pm ). During prolonged storage below 125 ° C., a conversion to another, hexagonal modification (a = 797.8 pm, c = 1968 pm ). Titanium (IV ) iodide, a strong Lewis acid and forms with Lewis bases (for example, with ethers and amines) very stable adducts.

Use

Titanium (IV) iodide, is used in the chemical vapor deposition of titanium nitride films with optimized parameters. It is also used for the production of very pure titanium.