Tantalum (V) ethoxide
Structural formula | ||||||||||||||||
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Dimer of tantalum (V) ethoxide | ||||||||||||||||
General | ||||||||||||||||
Surname | Tantalum (V) ethoxide | |||||||||||||||
other names |
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Molecular formula | C 10 H 25 O 5 Ta | |||||||||||||||
Brief description |
flammable colorless liquid with a sweetish odor |
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External identifiers / databases | ||||||||||||||||
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properties | ||||||||||||||||
Molar mass | 406.26 g mol −1 | |||||||||||||||
Physical state |
liquid |
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density |
1.566 g cm −3 (25 ° C) |
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Melting point |
21 ° C |
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boiling point |
155 ° C at 0.01 hPa |
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solubility |
Hydrolysis in water |
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Refractive index |
1.487 (20 ° C) |
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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 . Refractive index: Na-D line , 20 ° C |
Tantalum (V) ethoxide is a chemical compound from the group of tantalum compounds and alcoholates .
Extraction and presentation
Tantalum (V) ethoxide can be obtained by reacting tantalum pentachloride and ethanol in solvents such as benzene or toluene .
properties
Tantalum (V) ethoxide is a compound with a melting point of 21 ° C. Above this temperature there is an inflammable colorless liquid with a sweetish odor. Below the melting point, the compound forms a colorless solid. In the solid body there are six-coordinate dimers in the form of a double octahedron. In solvents with donor properties, a monomer is formed, the sixth coordination site being occupied by a solvent molecule. Tantalum (V) ethoxide dissolves in water with hydrolysis .
use
Tantalum (V) ethoxide is mainly used for the production of thin oxide films for electronic, optical and optoelectronic components.
safety instructions
The vapors of tantalum (V) ethoxide can form an explosive mixture with air ( flash point 29 ° C).
Individual evidence
- ↑ a b c d e f g h i j Entry on tantalum (V) ethoxide in the GESTIS substance database of the IFA , accessed on February 10, 2017(JavaScript required) .
- ↑ Tantalum (V) ethoxide data sheet from Sigma-Aldrich , accessed on January 1, 2011 ( PDF ).
- ↑ a b Preparation of high-purity tantalum ethoxide by vacuum distillation , Trans. Nonferrous Met. Soc. China 18 (2008) 196-201.
- ↑ DC Bradley, W. Wardlaw, A. Whitley: Normal alkoxides of quinquevalent tantalum in J. Chem. Soc., 1955, 726-728, doi : 10.1039 / JR9550000726 .
- ↑ Sheng-hai Yang, Ya-nan Caib, Hai-ping Yang, Sheng-ming Ying: Electrochemical synthesis and characterization of tantalum alkoxides in Trans. Nonferrous Met. Soc. China 19 (2009) 1504-1508, doi : 10.1016 / S1003-6326 (09) 60060-1 .
- ↑ DC Bradley, W. Wardlaw, A. Whitley: The effect of solvents on the molecular complexities of tantalum n-alkoxides in J. Chem. Soc., 1956, 5-7, doi : 10.1039 / JR9560000005 .