Angewandte Chemie International Edition
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Inside Cover: Alane-Based Classical and Frustrated Lewis Pairs in Polymer Synthesis: Rapid Polymerization of MMA and Naturally Renewable Methylene Butyrolactones into High-Molecular-Weight Polymers (Angew. Chem. Int. Ed. 52/2010)
Frustrated Lewis pairs have been used as exceptional polymerization catalysts for the conversion of naturally renewable monomers into sustainable polymers. In their Communication on page 10158 ff., E. Chen and co-workers describe the use of [Al(C6F5)3], phosphines, and N-heterocyclic carbenes as classical and frustrated Lewis pair catalysts. Similar to the horns that prevent fighting rams from hitting their heads, the bulky ligands of the Lewis acids and bases inhibit the quenching of their reactivity.