1-Ethyl-3-methylimidazolium methylcarbonate, CAS: 251102-25-7

Key Applications:

1. CO₂ Capture, Activation, and Conversion

• Functions as a CO₂‑reactive ionic liquid capable of forming reversible carbonate species.
• Supports low‑temperature CO₂ absorption with reduced viscosity due to methanol dilution.
• Serves as a medium for CO₂ conversion reactions, including cycloaddition to epoxides, transesterifications, and carbonate formation.
• Useful for mechanistic studies of IL–CO₂ equilibria because the methylcarbonate anion participates in exchange reactions.

2. Green Catalysis and Organocatalytic Transformations

• Acts as a basic, nucleophilic ionic liquid catalyst.
• Applicable to O‑alkylation, esterification, ring‑opening polymerizations, and carbonate exchange reactions.
• Methanol content improves mass transport and supports flow chemistry configurations.

3. Solvent and Co‑solvent for Reactive Systems

• Provides a polar, aprotic, mildly basic medium suitable for organometallic transformations and N‑heterocycle functionalization.
• Supports biocatalysis in CO₂‑responsive environments.
• Methanol formulation enhances substrate solubility and simplifies handling.

4. Biomass Processing and Lignocellulosic Chemistry

• Capable of partial cellulose dissolution and swelling due to carbonate basicity.
• Enables CO₂‑assisted fractionation of lignin and hemicellulose.
• Useful in pretreatment workflows where reversible carbonate chemistry is advantageous.

5. Electrochemical and Energy Applications

• Serves as a carbonate‑based electrolyte precursor for CO₂ electroreduction studies and low‑temperature carbonate electrolytes.
• Methanol dilution reduces viscosity and improves ionic mobility for exploratory electrochemical systems.

6. Polymer and Materials Processing

• Acts as a reactive plasticization medium for polycarbonates and polyurethanes.
• Enables carbonate exchange reactions in polymer modification.
• Supports synthesis of functionalized imidazolium‑containing polymers via anion metathesis.

7. Precursor for Anion Exchange and Ionic Liquid Synthesis

• Methylcarbonate is a labile anion suitable for generating EMIM‑based ionic liquids with sensitive or specialized anions.
• Useful for preparing zwitterionic intermediates and conducting mild, alcohol‑compatible anion metathesis.
• Methanol formulation simplifies downstream solvent removal after exchange.

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