Air-Stable, Electron-Deficient Fe(II) Catalytic Porphyrins. Characterization and Molecular Structures of Rare High Spin Fe(II) Hexacoordinated Porphyrins

The synthesis, characterization, and molecular structures of the
first air-stable, hexacoordinated high spin Fe(II) porphyrins (1) with
axial alcohols are reported (1 = Fe(II) meso-tetrakis(o-dichlorophenyl)-β-octanitroporphyrin). The structure of 1 with two axial waters is also presented. The very different conformations and metrics
observed with the two types of ligands illustrate the acute interplay
between ligands, conformations, and spin states in Fe porphyrins.