Frustrated growth: Al(C6F5)3-based classical and frustrated Lewis pairs with select phosphines or N-heterocyclic carbenes exhibit exceptional activity in polymerization of methyl methacrylate (MMA) and naturally renewable methylene butyrolactones (M)MBL at ambient temperature, thereby affording high-molecular-weight PMMA and environmentally sustainable P(M)MBL (see scheme).
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Zhang et al. (2010) studied this question.
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