Bis(tert-butylimino)bis(dimethylamino)tungsten(VI)
Synonym: BTBMW, TBIDMW, ((CH3)3 CN)2W(N(CH3)2)2
CAS Number 406462-43-9 | MDL Number MFCD07369712 | EC Number 624-177-4
Bis(tert-butylimino)bis(dimethylamino)tungsten(VI), also known as BTBMW or Bis(tert-butylimido)bis(dimethylamido)tungsten, is an organotungsten compound with the molecular formula C₁₂H₃₀N₄W and a molecular weight of 414.23 g/mol. This compound features tungsten in a +6 oxidation state, coordinated with two tert-butylimido groups and two dimethylamino ligands, providing a stable yet reactive complex suitable for a variety of deposition processes. Typically appearing as a light yellow to dark orange liquid, it has a purity level of 98%+, confirmed by integration NMR. Given its sensitivity to air and moisture, Bis(tert-butylimino)bis(dimethylamino)tungsten(VI) must be stored under inert gas conditions to maintain stability.
Applications in Organic and Inorganic Synthesis
This tungsten compound is primarily used as a precursor in metal-organic chemical vapor deposition (MOCVD) and atomic layer deposition (ALD) techniques for creating tungsten-based films. The combination of tert-butylimido and dimethylamido ligands enables controlled deposition, making it valuable in developing thin films required in semiconductor and microelectronic industries. Bis(tert-butylimino)bis(dimethylamino)tungsten(VI) contributes to producing uniform, high-performance coatings, essential for advanced device manufacturing where precision and material purity are critical.
Precautions for Safe Storage and Handling
With hazard codes H227, H260, H314, and H318, this compound is classified as flammable, water-reactive, and capable of causing severe skin and eye irritation. It is essential to handle it with appropriate personal protective equipment, including gloves, goggles, and flame-resistant clothing, in a well-ventilated area. Due to its air and moisture sensitivity, it should be stored in a sealed container under an inert atmosphere, such as nitrogen or argon. The boiling point of Bis(tert-butylimino)bis(dimethylamino)tungsten(VI) is approximately 81°C at 0.02 mmHg, necessitating careful temperature control during storage and handling.
Industrial and Laboratory Applications
In both industrial and laboratory settings, Bis(tert-butylimino)bis(dimethylamino)tungsten(VI) is essential for creating tungsten-based thin films and coatings, particularly for high-tech applications. Its precise reactivity and stable structure support its use in ALD and MOCVD processes, facilitating the formation of uniform tungsten layers in semiconductor devices and protective coatings. This compound’s high purity and reactivity profile make it indispensable for applications requiring precise tungsten incorporation, enhancing research and production in material sciences and electronics.
Bis(tert-butylimido)bis(dimethylamido)tungsten is used for preparing of thin films by plasma-assisted atomic layer deposition (ALD). See link below
Ereztech manufactures and sells this product in small and bulk volumes. Glass ampules, bottles or metal ampules or bubblers are available for packaging. For additional analytical information or details about purchasing W2439 contact us at sales@ereztech.com
Safety information
| UN | 3399 |
| Hazardous class | 4.3(3) |
| Packing group | I |
| Pictograms |   |
| Signal word | DANGER |
| Hazard statements | H225-H260-H314-H318 |
| Precautionary statements | P210-P223-P231 + P232-P233-P240-P241-P242-P243-P260-P264-P280-P301 + P330 + P331-P303 + P361 + P353-P304 + P340-P305 + P351 + P338-P310-P334 + P335-P370 + P378-P402 + P404-P403 + P235-P405-P422-P501 |
| Transport description | ORGANOMETALLIC SUBSTANCE, LIQUID, WATER-REACTIVE, FLAMMABLE (Bis(tert-butylimino) bis(dimethylamino) tungsten(VI)) |
| In TSCA registry | No (sold for research and development usage only) |
First Aid Measures
| General advice | Consult a physician. Show this safety data sheet to the doctor in attendance. Move out of the dangerous area. |
| Eye contact | Rinse thoroughly with plenty of water for at least 15 minutes and consult a physician. |
| Skin contact | Wash off with soap and plenty of water. Consult a physician. |
| Inhalation | If breathed in, move person into the fresh air. If not breathing, give artificial respiration. Consult a physician. |
| If swallowed | Do NOT induce vomiting. Never give anything by mouth to an unconscious person. Rinse mouth with water. Consult a physician. |
Certificates of Analysis (CoA)
If you don’t see the needed lot of Bis(tert-butylimino)bis(dimethylamino)tungsten(VI) below please contact customer support at sales@ereztech.
Lot# 031/358 Lot# 031/375 Lot# 031/404 Lot# 031/415
External identifiers for BTBMW
| Pubchem CID | 16217328 |
| SMILES | CC(C)(C)N=[W]=NC(C)(C)C.C[N-]C.C[N-]C |
| IUPAC Name | bis(tert-butylimino)tungsten;dimethylazanide |
| InchI Identifier | InChI=1S/2C4H9N.2C2H6N.W/c2*1-4(2,3)5;2*1-3-2;/h2*1-3H3;2*1-2H3;/q;;2*-1; |
| InchI Key | JVCWKXBYGCJHDF-UHFFFAOYSA |
Known applications and external links
With Bis(tert-butylimino)bis(dimethylamino)tungsten(VI) other customers often ask:
- Tungsten hexacarbonyl
- Bis(tert-butylimino)bis(dimethylamino)tungsten(VI)
- Bis(ethylcyclopentadienyl)tungsten dihydride
Ereztech synthesizes and sells additional W-compounds.
To purchase W2439 contact us at sales@ereztech.com
