1-Butyl-2,3-dimethylimidazolium tetrafluoroborate
[CAS# 402846-78-0]

Identification

• Classification: Chemical reagent >> Organic reagent >> Ionic liquid
• Name: 1-Butyl-2,3-dimethylimidazolium tetrafluoroborate
• Molecular Formula: C₉H₁₇N₂.BF₄
• Molecular Weight: 240.05
• CAS Registry Number: 402846-78-0
• EC Number: 678-164-3
• SMILES: [B-](F)(F)(F)F.CCCCN1C=C[N+](=C1C)C

Properties

• Density: 1.198 g/mL
• Melting point: 37 °C

Safety Data

• Hazard Symbols: GHS05;GHS07 Danger
• Risk Statements: H302-H314-H318
• Safety Statements: P260-P264-P264+P265-P270-P280-P301+P317-P301+P330+P331-P302+P361+P354-P304+P340-P305+P354+P338-P316-P317-P321-P330-P363-P405-P501

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Serious eye damage	Eye Dam.	1	H318
Skin corrosion	Skin Corr.	1C	H314
Acute toxicity	Acute Tox.	4	H302

Discovery and Applications

1-Butyl-2,3-dimethylimidazolium tetrafluoroborate is an ionic liquid that has attracted much attention for its unique properties and wide range of uses in a variety of scientific and industrial fields. This compound is known for its stability and low volatility and represents a significant development in the field of ionic liquids.

1-Butyl-2,3-dimethylimidazolium tetrafluoroborate (commonly abbreviated as [Bmim][BF4]) was first synthesized in the late 20th century as part of ongoing research into ionic liquids. The goal was to create a compound with unique solvation properties and thermal stability that would be suitable for a variety of applications. The synthesis involves the reaction of 1-butyl-2,3-dimethylimidazolium with tetrafluoroboric acid, which produces a stable ionic liquid with a tetrafluoroborate anion that helps the compound achieve its desired properties.

1-Butyl-2,3-dimethylimidazolium tetrafluoroborate is widely used as a solvent in chemical reactions. Its ionic nature enables it to dissolve a wide range of organic and inorganic substances. This ability makes it an excellent medium for a variety of chemical transformations, including catalysis and synthesis.

Due to its high ionic conductivity, [Bmim][BF4] is used in electrochemical applications such as batteries and supercapacitors. It acts as an electrolyte in these devices, enhancing their performance and stability. The low vapor pressure and thermal stability of the compound further improve the efficiency and safety of electrochemical systems.

In analytical chemistry and environmental science, 1-butyl-2,3-dimethylimidazolium tetrafluoroborate is used in liquid-liquid extraction processes. It helps separate different substances from complex mixtures and aids in the purification and analysis of target compounds.

The compound is used as a catalyst or catalyst support in various reactions. It is valuable in organic synthesis due to its ability to stabilize reaction intermediates and increase reaction rates. It is particularly useful in processes that require high selectivity and efficiency.

In materials science, [Bmim][BF4] is used in the synthesis of advanced materials. Its role as a solvent or medium helps in the formation of nanomaterials and other functional materials with tailored properties. This application is important in the development of new materials with specific properties for industrial use.

One of the main advantages of 1-butyl-2,3-dimethylimidazolium tetrafluoroborate is its high stability and low volatility. These properties make it a safer, more reliable alternative to traditional solvents, reducing the risks associated with volatile organic compounds. The ability of this ionic liquid to dissolve a wide range of substances increases its usefulness in a variety of chemical processes. This versatility enhances its use in chemical synthesis, separations, and extractions. As a green solvent, [Bmim][BF4] helps reduce the environmental impact of chemical processes. Its reusability and low toxicity support sustainable practices in industrial and research settings.

References

2016. Properties of 1-butyl-2,3-dimethylimidazolium tetrafluoroborate mixtures. Physicochemical Properties of Ionic Liquid Mixtures.
DOI: 10.1007/978-94-017-7573-1_101

2018. Thermodynamic Properties of Ternary Ionic Liquid Mixture Containing a Common Ion: Excess Molar Volumes, Excess Isentropic Compressibilities, Excess Molar Enthalpies and Excess Heat Capacities. Journal of Solution Chemistry, 47(2).
DOI: 10.1007/s10953-018-0719-y

2018. Excess molar enthalpies for [Bmmim][BF4] + [Bmim][BF4] or [Emim][BF4] + cyclopentanone or cyclohexanone mixtures. Journal of Thermal Analysis and Calorimetry, 134(1).
DOI: 10.1007/s10973-018-7770-1