Description
ATOMFAIR® 1-ETHYL-3-METHYLIMIDAZOLIUM BROMIDERESEARCH GRADE MATERIAL
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A halogenated ionic liquid with a well-defined solid-liquid phase transition at 76.75 °C and thermal decomposition initiating at 301 °C. This material requires storage and handling at temperatures below its decomposition threshold to maintain chemical integrity.
- Thermal Decomposition Limit: Maintain environmental temperatures below 301 °C to prevent thermal degradation of the halide salt.
- Solid-Liquid Phase Transition: Avoid prolonged exposure above 76.75 °C to prevent melting and potential change in physical form due to the sharp melting point.
How does the 76.75°C melting point of [C2MIm]Br affect its applicability in low-temperature electrochemical studies compared to room-temperature ionic liquids?
[C2MIm]Br melts sharply at 76.75°C, making it a solid at ambient temperature and unsuitable for low-temperature electrochemical studies without heating. However, its high thermal stability up to 301°C enables reliable molten salt electrochemistry in elevated-temperature systems where room-temperature ionic liquids would degrade or volatilize.
What are the key considerations for using [C2MIm]Br as a solvent or catalyst in transition-metal-mediated organic synthesis?
[C2MIm]Br is a halogenated ionic liquid whose bromide anion can coordinate with or serve as a halide source for transition metals, influencing catalytic cycles. Its full water solubility enables homogeneous aqueous-phase workups, but water content must be strictly controlled to avoid hydrolysis or ligand displacement in moisture-sensitive reactions.
What specific storage and handling precautions are required for [C2MIm]Br to maintain its purity and prevent decomposition?
Store [C2MIm]Br in a dry, sealed container away from heat sources, as decomposition initiates at 301°C. Being water-soluble, it is hygroscopic; for moisture-sensitive applications, handle under inert atmosphere and dry thoroughly before use. Avoid contact with strong oxidizing agents to prevent exothermic reactions.
1-Ethyl-3-methylimidazolium bromide (EMIM Br) presents a well-defined crystalline phase with a melting point of 76.75°C and thermal stability up to 301°C, suitable for molten salt electrochemistry and synthesis. Its solid state at room temperature and confirmed solubility only in water impose specific handling and solvent selection requirements for laboratory deployment.
Positive
- Sharp melting point for molten salt studies: Features a sharp, well-defined melting point boundary at 76.75 °C for specialized molten salt applications, enabling precise phase control in electrochemical or synthetic setups.
- High thermal stability up to 301 °C: Exhibits clean stability thresholds with structural breakdown occurring strictly at 301 °C, allowing operation over a wide temperature window without premature decomposition.
Trade-offs
- Solid at ambient laboratory temperatures: With a melting point of 76.75 °C, this material is a crystalline solid at standard room temperature and requires heating for use in liquid-phase applications such as electrochemistry or synthesis.
- Only aqueous solubility is explicitly confirmed: The technical specification lists solubility only in water; performance or miscibility in organic solvents is not characterized, necessitating empirical validation for non-aqueous workflows.
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