1-Butyl-3-methylimidazolium methylcarbonate, CAS: 916850-37-8

Key Applications:

Solvent and Medium for Organic Synthesis

• Functions as a polar, non‑volatile reaction medium for nucleophilic substitutions, condensations, and base‑sensitive transformations.
• Supports homogeneous catalysis and transition‑metal–mediated coupling reactions by stabilizing reactive intermediates.
• The methylcarbonate anion provides mild basicity, enabling selective deprotonation without the harshness of inorganic bases.

CO₂‑Responsive and Carbonate‑Based Chemistry

• Useful in CO₂‑capture and CO₂‑activation studies due to the reversible nature of the methylcarbonate anion.
• Serves as a model ionic liquid for probing carbonate equilibria, anion exchange, and CO₂‑triggered speciation changes.
• Employed in developing reversible CO₂‑binding solvents and switchable polarity systems.

Polymer Processing and Functional Material Development

• Acts as a processing aid for cellulose, chitosan, and other biopolymers that require strong hydrogen‑bond disruption.
• Supports the preparation of carbonate‑functionalized polymers and polymer electrolytes.
• Enables dissolution and regeneration workflows for sustainable materials research.

Electrochemical and Energy‑Related Applications

• Provides a stable ionic environment for electrochemical studies, including electrodeposition and redox‑active species stabilization.
• Investigated as a component in electrolyte formulations for low‑volatility, non‑flammable systems.
• The carbonate anion contributes to SEI‑relevant decomposition pathways, making it useful in mechanistic battery research.

Catalysis and Reaction Engineering

• Enhances catalytic turnover in base‑assisted reactions due to its intrinsic anion basicity.
• Supports organocatalytic transformations where carbonate species participate in proton shuttling or transient activation.
• Compatible with biphasic catalysis and catalyst recycling strategies.

Separation Science and Extraction

• Applied in liquid–liquid extraction of metal ions, organic acids, and polar organics.
• The carbonate anion modulates extraction selectivity through tunable hydrogen‑bonding and acid–base interactions.
• Useful in designing greener extraction systems with reduced volatility and improved recyclability.

Analytical and Spectroscopic Studies

• Serves as a reference ionic liquid for studying carbonate speciation, ion pairing, and solvent–solute interactions.
• Suitable for NMR, IR, and conductivity studies due to its well‑defined structure and high purity.
• The methanol solution format (30% in MeOH) improves handling and facilitates direct injection into analytical workflows.

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