Titanium (IV) iodide
Structural formula | ||||||||||||||||
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General | ||||||||||||||||
Surname | Titanium (IV) iodide | |||||||||||||||
other names |
Titanium tetraiodide |
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Molecular formula | TiI 4 | |||||||||||||||
Brief description |
red-brown solid |
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properties | ||||||||||||||||
Molar mass | 555.49 g mol −1 | |||||||||||||||
Physical state |
firmly |
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density |
4.3 g cm −3 (25 ° C) |
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Melting point |
150 ° C |
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boiling point |
377 ° C |
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solubility |
dissolves in water with hydrolytic decomposition |
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safety instructions | ||||||||||||||||
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As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . |
Titanium (IV) iodide is an inorganic chemical compound of titanium from the group of iodides .
Extraction and presentation
Titanium (IV) iodide can be obtained by reacting titanium with iodine .
Alternatively it can be made from titanium oxides with the help of aluminum (III) iodide
or obtained by reacting titanium (IV) chloride with hydrogen iodide .
properties
Titanium (IV) iodide is a red-brown solid that fumes heavily in the air. It crystallizes in an octahedral shape in the space group Pa 3 (space group no. 205) (a = 1202 pm ). If stored below 125 ° C for a longer period, it is converted into another, hexagonal modification (a = 797.8 pm, c = 1968 pm). Titanium (IV) iodide is a strong Lewis acid and forms very stable adducts with Lewis bases (e.g. with ethers and amines).
use
Titanium (IV) iodide is used in chemical vapor deposition of titanium nitride films with optimized parameters.
Titanium (IV) iodide is now formed during the production of very pure titanium in the Van Arkel de Boer process .
Individual evidence
- ↑ a b c d e f g h data sheet Titanium (IV) iodide, anhydrous, powder, 99.99% trace metals basis from Sigma-Aldrich , accessed on August 6, 2012 ( PDF ).
- ↑ a b c d e Georg Brauer (Ed.), With the collaboration of Marianne Baudler u. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume II, Ferdinand Enke, Stuttgart 1978, ISBN 3-432-87813-3 , p. 1350.
- ↑ Erik GM Tornqvist, Willard F. Libby: Crystal structure, solubility, and electronic spectrum of titanium tetraiodide. In: Inorganic Chemistry. 18, 1979, pp. 1792-1796, doi : 10.1021 / ic50197a013 .
- ^ A b Hans P. Latscha, Helmut A. Klein: Inorganic Chemistry . Springer DE, 2002, ISBN 3-540-42938-7 , pp. 394 ( limited preview in Google Book search).