Pentakis(dimethylamino)tantalum
[CAS# 19824-59-0]

Identification

• Classification: Organic raw materials >> Organometallic compound >> Organic scandium, tantalum, thallium, tungsten, antimony, lanthanum, lead, vanadium, molybdenum, chromium, ytterbium, etc.
• Name: Pentakis(dimethylamino)tantalum
• Synonyms: dimethylazanide tantalum(5+)
• Molecular Formula: Ta(C₂H₆N)₅
• Molecular Weight: 401.33
• CAS Registry Number: 19824-59-0
• EC Number: 624-567-4
• SMILES: C[N-]C.C[N-]C.C[N-]C.C[N-]C.C[N-]C.[Ta+5]

Properties

• Melting point: 100 °C (decomp)^*
• Boiling point: 100 °C (0.01 Torr)^*

^* "Metal-Organics Catalog" physical property data were obtained from Gelest, Inc. of Morrisville, Pennsylvania (US)

Safety Data

• Hazard Symbols: GHS02;GHS05 Danger
• Risk Statements: H228-H260-H314
• Safety Statements: P210-P223-P231+P232-P240-P241-P260-P264-P280-P301+P330+P331-P302+P335+P334-P302+P361+P354-P304+P340-P305+P354+P338-P316-P321-P363-P370+P378-P402+P404-P405-P501

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Substances or mixtures which in contact with water emit flammable gases	Water-react.	1	H260
Skin corrosion	Skin Corr.	1B	H314
Flammable solids	Flam. Sol.	2	H228
Flammable solids	Flam. Sol.	1	H228

Discovery and Applications

Pentakis(dimethylamino)tantalum, with the chemical formula Ta(NMe₂)₅, is an organotantalum compound known for its significant role in various applications in materials science and chemical synthesis. This compound features a tantalum atom coordinated by five dimethylamino groups, making it a noteworthy example of a transition metal amide complex.

The discovery of pentakis(dimethylamino)tantalum is closely related to the study of transition metal amides and their applications in chemical processes. The synthesis of Ta(NMe₂)₅ typically involves the reaction of tantalum pentachloride with dimethylamine. The resulting complex exhibits a pentagonal bipyramidal geometry around the tantalum center, where each dimethylamino group acts as a donor ligand.

One of the primary applications of pentakis(dimethylamino)tantalum is in chemical vapor deposition (CVD), particularly in the fabrication of tantalum-based thin films and coatings. The compound serves as a precursor in CVD processes, enabling the deposition of high-quality tantalum films. These films are crucial for the production of advanced electronic devices, including capacitors and semiconductors, where tantalum's properties enhance the performance and reliability of the devices.

Pentakis(dimethylamino)tantalum is also used as a catalyst or catalyst precursor in various chemical reactions. Its presence can significantly influence the reactivity of substrates in polymerization reactions and other catalytic processes. The compound's ability to stabilize reactive intermediates and facilitate complex transformations makes it a valuable tool in organic synthesis and materials chemistry.

In addition to its industrial applications, pentakis(dimethylamino)tantalum is of interest in the study of transition metal amides and their coordination chemistry. Researchers use this compound to explore the behavior of tantalum in different chemical environments and to develop new materials with tailored properties. The insights gained from studying Ta(NMe₂)₅ contribute to the broader understanding of metal-amide chemistry and the design of advanced materials.

Handling pentakis(dimethylamino)tantalum requires standard safety precautions due to the reactivity of dimethylamino groups and potential hazards associated with tantalum compounds. Proper safety measures, including working in well-ventilated areas and using appropriate personal protective equipment, are essential to minimize risks during its use and storage.

Ongoing research continues to explore new applications and refine the use of pentakis(dimethylamino)tantalum in various fields. Advances in materials science, catalysis, and semiconductor technology are likely to further enhance the utility of this compound and lead to the development of innovative technologies.

In summary, pentakis(dimethylamino)tantalum is an important organotantalum compound with significant applications in chemical vapor deposition, catalysis, and research. Its discovery and development have contributed to advancements in materials science and chemical processes, and continued research holds promise for discovering further uses and improvements.

References

2024. Preceramic metallocarbosilanes: synthesis, properties, thermal transformation. *Russian Chemical Bulletin*.
DOI: 10.1007/s11172-024-4149-2

2021. Cyclometallation of the Dimethylamide Ligand in the Reaction of Ta(NMe2)5 with CS2. *Russian Journal of Coordination Chemistry*.
DOI: 10.1134/s1070328421100055

2021. Amidophenolate Tantalum Complexes. *Russian Journal of Coordination Chemistry*.
DOI: 10.1134/s1070328421090074