Functionalization of the tetrairon cluster Cp4Fe4(CO)4 with fulleropyrrolidine

Abstract

Condensation of the formyl group of Cp₃Fe₄(CO)₄(C₅H₄CHO) with N-methylglycine and C₆₀ produces Cp₃Fe₄(CO)₄(C₅H₄–CHNMeCH₂C₆₀) (1), where one cyclopentadienyl ring of the tetrairon cluster is linked to a fulleropyrrolidinyl moiety. A similar reaction with the bisformyl cluster Cp₂Fe₄(CO)₄(C₅H₄CHO)₂ affords Cp₂Fe₄(CO)₄(C₅H₄–CHNMeCH₂C₆₀)₂ (2). Compounds 1 and 2 have been characterized by mass, IR, UV-Vis, and NMR spectroscopy. The electrochemistry of 1 and 2 was investigated by cyclic voltammetry and differential pulse voltammetry.