Tantalum (V) chloride

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Structural formula
No drawing available
General
Surname Tantalum (V) chloride
other names

Tantalum pentachloride

Molecular formula TaCl 5
Brief description

yellowish solid with a pungent odor

External identifiers / databases
CAS number 7721-01-9
EC number 231-755-6
ECHA InfoCard 100,028,869
PubChem 24394
Wikidata Q413987
properties
Molar mass 358.21 g mol −1
Physical state

firmly

density

3.68 g cm −3

Melting point

216-217 ° C

boiling point

232-235 ° C

solubility
  • decomposes in water
  • soluble in ethanol
safety instructions
GHS labeling of hazardous substances
05 - Corrosive 07 - Warning

danger

H and P phrases H: 302-314
P: 280-305 + 351 + 338-310
Toxicological data

1900 mg kg −1 ( LD 50ratoral )

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 . Template: room group / 12

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

  1. 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) .
  2. 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.
  3. ^ S. Rabe, U. Müller, "Crystal structure of tantalum pentachloride, (TaCl 5 ) 2 " Z. Kristallogr. - New Cryst. Struct. 2000 , 215 , 1-2.
  4. ^ Preparation of high-purity tantalum ethoxide by vacuum distillation , Trans. Nonferrous Met. Soc. China 18 (2008) 196-201.