Tantalum (V) chloride
Structural formula | ||||||||||||||||
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General | ||||||||||||||||
Surname | Tantalum (V) chloride | |||||||||||||||
other names |
Tantalum pentachloride |
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Molecular formula | TaCl 5 | |||||||||||||||
Brief description |
yellowish solid with a pungent odor |
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properties | ||||||||||||||||
Molar mass | 358.21 g mol −1 | |||||||||||||||
Physical state |
firmly |
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density |
3.68 g cm −3 |
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Melting point |
216-217 ° C |
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boiling point |
232-235 ° C |
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solubility |
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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 . |
Tantalum (V) chloride is a chemical compound from the group of tantalum compounds and chlorides .
Extraction and presentation
Tantalum (V) chloride can be obtained directly from the elements.
Alternatively, the representation is made of tantalum (V) oxide and thionyl chloride
or from tantalum (V) oxide and tetrachloromethane possible.
properties
Tantalum (V) chloride is a yellowish solid with a pungent odor, which decomposes in water or in concentrated hydrochloric acid with separation of tantalic acid. It has a monoclinic crystal structure with the space group C 2 / m (space group no.12) (a = 1823 pm , b = 1776 pm, c = 586 pm, β = 90.6 °). The chemically pure compound is colorless, the yellow color is usually due to contamination by niobium (V) chloride or tungsten chlorides .
use
Tantalum (V) chloride is used as a chlorinating agent in organic syntheses. By reaction with ethanol in solvents such as benzene or toluene can tantalum (V) ethoxide can be obtained.
Individual evidence
- ↑ a b c d e f g h i j Entry on tantalum (V) chloride in the GESTIS substance database of the IFA , accessed on February 14, 2017(JavaScript required) .
- ↑ a b c d e Georg Brauer (Ed.) U. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume III, Ferdinand Enke, Stuttgart 1981, ISBN 3-432-87823-0 , p. 1453.
- ^ S. Rabe, U. Müller, "Crystal structure of tantalum pentachloride, (TaCl 5 ) 2 " Z. Kristallogr. - New Cryst. Struct. 2000 , 215 , 1-2.
- ^ Preparation of high-purity tantalum ethoxide by vacuum distillation , Trans. Nonferrous Met. Soc. China 18 (2008) 196-201.