Inside Cover: Alcohol-Promoted Ring-Opening Alkyne Metathesis Polymerization (Angew. Chem. Int. Ed. 17/2013)



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An air-stable, dimeric, crystalline molybdenum propylidyne complex is activated by alcohol to initiate ring-opening alkyne metathesis polymerization (ROAMP) of cyclooctynes, as reported by C. Nuckolls and co-workers in their Communication on page 4591 ff. A mononuclear alcohol adduct was identified by NMR and kinetic studies as a key intermediate in the formation of metathesis-active species. The ROAMP reaction tolerates air, water, and phenolic substrates. Picture design: D. W. Paley.