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NMR and EPR spectra of five [(TPC)Fe(L)2]+ complexes (L = Im-d4, 4-NMe2Py, 2-MeHIm, Py-d5 and 4-CNPy) are reported. The 1H NMR shifts indicate a (dxy)2(dxz,dyz)3 ground state for the first two complexes, a mixed ground state for the next two, and a pure (dxz,dyz)4(dxy)1 ground state for the 4-CNPy complex, with significant ruffling of the chlorin ring. The temperature dependence of all complexes is consistent with a (dxz,dyz)3(dxy)1(dz2)1 excited state.
