Tantalum (V) ethoxide

Structural formula
	Dimer of tantalum (V) ethoxide
General
Surname	Tantalum (V) ethoxide
other names	Tantalum (V) ethylate; Tantalum (V) ethanolate;
Molecular formula	C 10 H 25 O 5 Ta
Brief description	flammable colorless liquid with a sweetish odor
External identifiers / databases
EC number	228-010-2
ECHA InfoCard	100.025.464
PubChem	2733710
Wikidata	Q2393155
properties
Molar mass	406.26 g mol −1
Physical state	liquid
density	1.566 g cm −3 (25 ° C)
Melting point	21 ° C
boiling point	155 ° C at 0.01 hPa
solubility	Hydrolysis in water
Refractive index	1.487 (20 ° C)
safety instructions
H and P phrases	H: 226-314
	P: 280-305 + 351 + 338-310
	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 .

[GESTIS-1] ↑ ^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) .

[Sigma-2] Tantalum (V) ethoxide data sheet from Sigma-Aldrich , accessed on January 1, 2011 ( PDF ).

[ysxbcn-3] Preparation of high-purity tantalum ethoxide by vacuum distillation , Trans. Nonferrous Met. Soc. China 18 (2008) 196-201.

[Bradley1-4] DC Bradley, W. Wardlaw, A. Whitley: Normal alkoxides of quinquevalent tantalum in J. Chem. Soc., 1955, 726-728, doi : 10.1039 / JR9550000726 .

[5] 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 .

[Bradley2-6] 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 .