Chemistry of the highly stable hindered cobalt sandwich compound (η5-Cp)Co(η4-C4Ph4) and its derivatives

• First review on (η5-Cp)Co(C4R4) type complexes.
• High stability, good solubility and ease of synthesis similar to ferrocene.
• Methods to derivatize a highly unreactive cyclopentadienyl ring.
• Basal bulkiness induced asymmetric catalysis.
• Catalysts for Aza-Claisen rearrangement.

A comprehensive review on the synthesis, reactions and applications centered on the highly stable and sterically hindered cobalt sandwich compound (η5-Cp)Co(η4-C4Ph4) is presented. The derivatization of the cyclopentadienyl and cyclobutadiene rings, reactions, structural properties and applications, particularly in the field of asymmetric catalysis of (η5-Cp)Co(η4-C4Ph4) and its derivatives and analogues are discussed. The chemistry of this cobalt sandwich compound is also compared with analogous derivatives of ferrocene.

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