Tantalum(V) ethoxide Chemical Properties

Melting point:

21 °C(lit.)

Boiling point:

155 °C0.01 mm Hg(lit.)

Density 

1.566 g/mL at 25 °C(lit.)

refractive index 

n20/D 1.487(lit.)

Flash point:

87 °F

storage temp. 

2-8°C

solubility 

Soluble in organic solvents.

form 

liquid

Specific Gravity

1.56

Water Solubility 

Decomposes in water. Soluble in organic solvents.

Sensitive 

Moisture Sensitive/Air Sensitive

Hydrolytic Sensitivity

8: reacts rapidly with moisture, water, protic solvents

BRN 

3678999

InChI

1S/5C2H5O.Ta/c5*1-2-3;/h5*2H2,1H3;/q5*-1;+5

InChIKey

HSXKFDGTKKAEHL-UHFFFAOYSA-N

SMILES

CCO[Ta](OCC)(OCC)(OCC)OCC

CAS DataBase Reference

6074-84-6(CAS DataBase Reference)

EPA Substance Registry System

Ethanol, tantalum(5+) salt (6074-84-6)

Safety Information

Hazard Codes 

C,F

Risk Statements 

10-34

Safety Statements 

16-26-36/37/39-45

RIDADR 

UN 2920 8/PG 2

WGK Germany 

3

F 

3-8-10-21

TSCA 

TSCA listed

HazardClass 

3

PackingGroup 

III

HS Code 

2905190019

Storage Class

3 - Flammable liquids

Hazard Classifications

Flam. Liq. 3

MSDS

• Language:English Provider:SigmaAldrich
• Language:English Provider:ACROS
• Language:English Provider:ALFA

Tantalum(V) ethoxide Usage And Synthesis

Description

Tantalum ethoxide can be used for the manufacture of tantalum (V) oxidethin-film materials using chemical vapor deposition, atomic layer deposition, and sol-gel processing. Those materials have applications in semiconductor, electrochromic and optical fields^1,2,3. In research filed, it can be used for the synthesis of some novel compounds such as oxo-alkoxide-carboxylates like Ta4O4(OEt)8(OOCCH3)4 with special molecular structure². It is also used to prepare tantalum oxide nanoparticles for the imaging cartilage⁴.

Reference

1. Sukanya Murali, †, A. Anand Deshpande, and C. G. Takoudis. "Modeling of the Metalorganic Chemical Vapor Deposition of Tantalum Oxide from Tantalum Ethoxide and Oxygen." Industrial & Engineering Chemistry Research 44.16(2005): págs. 6387-6392.
2. Dong, L. U., et al. "Synthesis Method and Application of Tantalum (Ⅴ) Ethoxide" Guangzhou Chemical Industry (2016).
3. https://www.alfa.com/en/catalog/014643/

Chemical Properties

clear colorless to almost colorless liquid or

Uses

Tantalum(V) ethoxide acts as a precursor used in the preparation of ultra thin films of tantalum oxide and other tantalum containing films, which finds application in semiconductors. It is also used to prepare tantalum oxide nanoparticles for the imaging cartilage.

General Description

Tantalum(V) ethoxide Ta(OC₂H₅)₅ is a tantalum alkoxide that can be used as a precursor in the preparation of tantalum oxide by chemical vapor deposition (CVD). It has excellent volatility and thermal stability. It can be synthesized by anodic oxidation of tantalum plate in anhydrous ethanol.

reaction suitability

core: tantalum
reagent type: catalyst

Synthesis

Chloride chemical method to produce tantalum(V) ethoxide is a relatively common method, the process is more mature. Chloride has high requirements for equipment and process. The main reason is because the raw material tantalum pentachloride and the product tantalum(V) ethoxide are easy to react with water vapor in the air. Tantalum pentachloride reacts with ethanol to release a large amount of heat, and the diluent and ethanol in the raw material are flammable and explosive liquids, so the reaction speed must be controlled in the pilot test or production. The reaction between tantalum pentachloride and ethanol will produce high concentration of hydrogen chloride, which is easy to corrode the equipment. The diluent in the raw material uses aromatic hydrocarbons with high toxicity. At present, the chlorination synthesis process is being studied by relevant units to replace aromatic hydrocarbons with other low-toxic organic solvents. The main features of the chlorination method are fast synthesis speed and small equipment investment. Because the raw material tantalum chloride reacts rapidly with ethanol and generates a lot of heat, an inert diluent must be used to control the reaction speed. Inert diluents mainly use aromatic hydrocarbons, which pose a certain risk to the health and safety of operators. Wastes containing aromatic hydrocarbons are difficult to dispose of. This method must be guaranteed by sufficient tantalum pentachloride feedstock and related safety and environmental equipment and measures.

Purification Methods

Purify it by distillation under reduced pressure. It aggregates in *C6H6,EtOH, MeCN, pyridine and diisopropyl ether. [Bradley et al. J Chem Soc 726 1955, Bradley et al. J Chem Soc 5 1956, Beilstein 1 IV 1312.]

Tantalum(V) ethoxide(6074-84-6)Related Product Information

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