| Identification | More | [Name]
TANTALUM(V) CHLORIDE | [CAS]
7721-01-9 | [Synonyms]
TANTALUM(+5)CHLORIDE
TANTALUM CHLORIDE
TANTALUM PENTACHLORIDE
TANTALUM(V) CHLORIDE
TaCl5
Tantalum chloride (TaCl5)
tantalumchloride(tacl5)
Tantalumchlorideanhydrous
Tantalumchloridehighpurity
TantalumVchlorideresublimedmetalsbasisyellowpowd
Tantalum(Ⅴ)chloride
TANTALUM(V) CHLORIDE, 99.99%
AMMONIUM CARBONATE EXTRA PURE, N. F., PH . FRANC.
Tantalum(V) chloride, 99.8% metals basis
TANTALUM(V) CHLORIDE, 99.999%, ANHYDROUS
TANTALUM (V) CHLORIDE ANHYDROUS 99+% (99.9%-TA)
TANTALUM (V) CHLORIDE RESUBLIMED (99.99+%-TA)SPECTRO
Tantalum(V)Chloride,Anhydrous,99.9%
Tantalum(V) chloride, 99.90%
Tantalum(V)chloride,resublimed(99.99+%-Ta)PURATREM | [EINECS(EC#)]
231-755-6 | [Molecular Formula]
Cl5Ta | [MDL Number]
MFCD00011253 | [Molecular Weight]
358.21 | [MOL File]
7721-01-9.mol |
| Chemical Properties | Back Directory | [Appearance]
Pale-yellow, crystalline powder; highly
reactive. Decomposed by moist air. Soluble in alcohol and potassium hydroxide
solution. Keep well stoppered. | [Melting point ]
221 °C
| [Boiling point ]
242 °C
| [density ]
3.68 g/mL at 25 °C(lit.)
| [vapor pressure ]
69.9hPa at 169.3℃ | [Fp ]
242°C | [storage temp. ]
no restrictions. | [solubility ]
Soluble in ether, carbon tetrachloride, sulfuric acid and potassium hydroxide. Slightly soluble in ethanol. | [form ]
powder
| [color ]
White to pale yellow | [Specific Gravity]
3.68 | [Water Solubility ]
Soluble in water (reacts). Also soluble in ethanol, ether and carbon tetrachloride. | [Sensitive ]
Moisture Sensitive | [Merck ]
14,9054 | [InChIKey]
OEIMLTQPLAGXMX-UHFFFAOYSA-I | [Uses]
Chlorination of organic substances, intermediate,
production of pure metal. | [CAS DataBase Reference]
7721-01-9(CAS DataBase Reference) | [EPA Substance Registry System]
Tantalum chloride (TaCl5) (7721-01-9) |
| Safety Data | Back Directory | [Hazard Codes ]
C | [Risk Statements ]
R22:Harmful if swallowed.
R34:Causes burns. | [Safety Statements ]
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection .
S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) . | [RIDADR ]
UN 3260 8/PG 2
| [WGK Germany ]
3
| [RTECS ]
WW5600000
| [F ]
3-10-21 | [TSCA ]
Yes | [HazardClass ]
8 | [PackingGroup ]
III | [HS Code ]
28273990 | [Safety Profile]
Poison by intraperitoneal route. Moderately toxic by ingestion. When heated to decomposition it emits toxic fumes of Cl-. | [Toxicity]
LD50 in rats (mg/kg): 75 i.p.; 1900 orally (Cochran) |
| Questions And Answer | Back Directory | [Physical Properties]
Tantalum(V) chloride, also known as tantalum pentachloride, Yellow monoclinic crystals; hygroscopic; critical temperature 494°C; critical volume 402 cm3/mol; can be sublimed without decomposition in chlorine atmosphere; reacts with water; soluble in ethanol, ether and carbon tetrachloride. | [Preparation]
Tantalum pentachloride is prepared by heating tantalum metal with excess chlorine:
2Ta + 5Cl2 → 2TaCl5
| [Reactions]
Tantalum pentachloride is hydrolyzed by water to form hydrous tantalum pentoxide, Ta2O5•nH2O and hydrochloric acid:
2TaCl5 + 5H2O → Ta2O5 + 10HCl
Reaction with hydrofluoric acid yields tantalum pentafluoride:
TaCl5 + 5HF → TaF5 + 5HCl
Tantalum pentachloride forms adducts with donor solvent molecules. Also, it forms several complexes and organometallic derivatives.
Reactions with alcohols in the presence of an amine forms dinuclear alkoxides. Thus, with ethanol in the presence of diethylamine, the dinuclear tantalum ethoxide, Ta2(OC2H5)10, is obtained.
Reaction with dimethylzinc forms dichlorotrimethyl tantalum, in which three chlorine atoms are substituted with methyl groups:
2TaCl5 + 3Zn(CH3)2 → 2(CH3)3TaCl2 + 3ZnCl2
Reaction with cyclopentadienyl sodium yields bis(cyclopentadienyl) tantalum trichloride:
TaCl5 + 2C5H5 Na → (C5H5)2TaCl3 + 2NaCl
|
| Hazard Information | Back Directory | [Chemical Properties]
Pale-yellow, crystalline powder; highly
reactive. Decomposed by moist air. Soluble in alcohol and potassium hydroxide
solution. Keep well stoppered. | [Application]
Tantalum(V) chloride is an excellent water soluble crystalline Tantalum source for uses compatible with chlorides.
Used to form mixed chloro-aryloxide compounds, such as [Ta(OC6H3-2,6-i-Pr2)2Cl3]2, which form pyridine or phosphine adducts with a distortedsix-coordinate geometry.
Also used as a starting material for new edge-bridged octahedral M6 cluster compounds such as CsErTa6Cl18, for which electron and stability studies were performed.
Used in the preparation of a simple catalyst for the polycyclotrimerizations of alkenediynes.
Used for the plasma-enhanced atomic layer deposition of tantalum nitride films. | [Production Methods]
Tantalum pentachloride, TaCl5, forms strongly hydroscopic, needle-shaped white crystals. It is produced on an industrial scale in large tonnage by the chlorination of tantalum scrap or ferrotantalum with NaFeCl4 or by the reductive chlorination of natural ores or synthetic raw materials. High purity TaCl5 is hydrolyzed with steam and thus converted to Ta2O5 of the highest purity. The reduction of TaCl5 with Mg or Al was repeatedly attempted but this thermite-type process never attained any industrial application. TaCl5 is soluble in absolute alcohol, forming the corresponding alkoxides. The alkoxides as well as the chlorides are suitable products for the deposition of tantalum or tantalum pentoxide layers. | [Flammability and Explosibility]
Nonflammable | [Purification Methods]
Purify it by sublimation in a stream of Cl2. It forms colourless needles when pure (yellow when contaminated with even less than 1% of NbCl5). It is sensitive to H2O; even in conc HCl it decomposes to tantalic acid. It is soluble in EtOH. [Rolsten J Am Chem Soc 80 2952 1958, Brauer in Handbook of Preparative Inorganic Chemistry (Ed Brauer) Academic Press Vol II p 1302 1965.] |
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