Functionalized phosphonium-based ionic liquids can effectively activate both epoxides and carbon dioxide, promoting the ring-opening of the epoxide and its subsequent reaction with carbon dioxide to form cyclic carbonates. The presence of specific functional groups on the cation or anion can enhance catalytic activity and selectivity.
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(2-carboxyethyl) triphenylphosphoniumbromide
4,4'-(Isopropylidenediphenyl)-bis{[4-(2,2-trimethylsilyl)ethynyl]-benzyl} ether
DIPENTAERYTHRITOL HEXAKIS(3-MERCAPTOPROPIONATE)
