Homoleptic Copper(I) Alkoxide and Phenoxide Clusters Stabilized by Intramolecular Pi-Coordination: Tetrameric o-Allylphenoxocopper(I) and Hexameric 2-Methyl-3-buten-2-oxocopper(I)

Journal article, 1998

Built-in pi-alkene functionalities have been found to yield homoleptic copper(I) phenoxide and alkoxide clusters exhibiting tetrameric cubane-or hexameric ribbon-shaped structures. While tetrameric o-allylphenoxocopper(I) (1) is remarkably stable, retains its structure in solution, and resists carbonylation, hexameric methylbutenoxocopper(I) (2) dissolves in such a way that era-bridged copper(I) is retained, whereas pi-alkene-copper(I) coordination is destroyed, leaving copper(I) free to accept carbon monoxide as a ligand.