Preparation and Molecular Structures of FcC ≡ CI and {Co2(CO)6}2(µ:µ-FcC2C2Fc) [Fc = Ferrocenyl, (h-C5H4)Fe(h-C5H5)]

Abstract

Iodination of FcC ≡ CH with morpholinium iodide gave structurally characterized iodoethynylferrocene, FcC ≡ CI; its reaction with Co₂(CO)₈ affords {Co₂(CO)₆}₂(µ:µ-FcC₂C₂Fc), also characterized by an X-ray structure determination. This compound is formed by deiodinative coupling of the iodoalkyne and subsequent addition of a Co₂(CO)₆ group to each C ≡ C triple bond in the resulting diyne.