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

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journal contribution
posted on 19.01.1998, 00:00 by Mikael Håkansson, Cesar Lopes, Susan Jagner
Built-in π-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 oxo-bridged copper(I) is retained, whereas π-alkene−copper(I) coordination is destroyed, leaving copper(I) free to accept carbon monoxide as a ligand.