Advanced Paramagnetic Resonance Studies on Manganese and Iron Corroles with a Formal d Electron Count.

Metallocorroles wherein the metal ion is Mn and formally Fe are studied here using field- and frequency-domain electron paramagnetic resonance techniques. The Mn corrole, Mn(tpfc) (tpfc = 5,10,15-tris(pentafluorophenyl)corrole trianion), exhibits the following = 2 zero-field splitting (zfs) parameters: = -2.67(1) cm, || = 0.

Iron(II) Corrole Anions.

Reduction of [Fe(TPC)(THF)] (TPC = trianion of 5,10,15-triphenylcorrole) with KC generates the iron(II) corrole anion, K(THF)[Fe(TPC)] (). Compound represents the first example of an isolated and crystallographically characterized corrole complex of divalent iron. The compound adopts an intermediate-spin state ( = 1), displaying square-planar geometry about the iron atom.