| Abstract
| - The electron-deficient Fe(II) porphyrin shown (1) is air-stable and binds ethanol or propanol to yield the first structures of hexacoordinated, planar Fe(II) porphyrins with alcohol ligands with metrics characteristic of the rare high spin Fe(II) state. The S = 2 assignment is confirmed by magnetic susceptibility and Mössbauer results. In contrast, the structure of 1(H2O)2 reveals a severely distorted macrocycle with metrics incompatible with a high spin state and illustrates the significant interplay of axial ligands, conformations, and spin states in Fe porphyrins.
- The synthesis, characterization, and molecular structures of thefirst air-stable, hexacoordinated high spin Fe(II) porphyrins (1) withaxial 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 metricsobserved with the two types of ligands illustrate the acute interplaybetween ligands, conformations, and spin states in Fe porphyrins.
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