Octakis(ferrocene)-substituted porphyrazines

Metal-free porphyrazine and metal porphyrazinates (M = Mg, Cu, Co or Zn) su bstituted with eight ferrocene moieties on the periphery through flexible a lkylthio-bridges have been synthesised in a multi-step reaction sequence. T he new compounds have been characterised by elemental analyses, i.r., H-1- and C-13-n.m.r., u.v.-vis. and mass spectra. The electrochemical investigat ion of porphyrazines indicates that all the ferrocene moieties are oxidised at the same potential, confirming the lack of any interaction among ferroc ene groups or between ferrocenes and the porphyrazine core.