Formation of the Intermediate-Spin Iron(III) Porphyrin Complexes with (d_<i>xz</i>, d_<i>yz</i>)³(d_<i>xy</i>)(d_<i>z</i>_²)¹ Electron Configuration

Abstract

On the basis of the difference in meso-13C chemical shifts, we have concluded that the intermediate-spin iron(III) complexes with highly ruffled and highly saddled porphyrins have different electron configurations. While the latter has a conventional (dxy)2(dxz, dyz)2(dz2)1, the former adopts a novel (dxz, dyz)3(dxy)1(dz2)1.