Oxo-bridged haem/non-haem iron complexes

Metallation (FeCl2 followed by aeration) of 5L, possessing a tris(2-pyridylmethyl)amine (tmpa) moiety tethered to a synthetic porphyrin, leads to an oxo-bridged haem/non-haem iron complex [(5L)FeIII–O–FeIII(Cl)]+1; its structure and properties compare closely with an analogue assembled via an acid–base synthesis, [(F8-tpp)FeIII(tmpa)(Cl)]+ 2 [F8-tpp = tetrakis(2,6-difluorophenyl)porphyrinate(2–)].