The first [2]cobaltocenophane and [2]metallocenophanium salts
Abstract
A tetramethylethylene bridged ferrocene 1 and cobaltocene 3 are synthesised in two steps from 2-tert-butyl-6,6-dimethylfluvene. Both can be oxidised to the corresponding cations, 2 and 4, the single-crystal X-ray structures of which have been determined.