Incorporation of boron in the walls of an "all-carbon" cyclophane: a novel approach to Lewis acidic macrocycles.
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abstract
A p-doped conjugated cyclophane! The six boron atoms of the bora-cyclophane (see picture) recently reported by Chen and Jkle team up to impart a set of unique properties to this novel macrocycle. In particular, this macrocycle undergoes six consecutive reversible reductions to afford the hexaanion. It also binds up to six small nucleophilic anions, a process that quenches the fluorescence of the ring and changes its character to electron-rich.