Synthesis, characterization and electrochemistry of iron porphyrin complexes of the form (por)Fe(O(CH 2 ) n SiMe 3 ) (por = OEP, TPP, TpivPP; n = 0 or 1) and their reaction with NO

The five-coordinate iron(III) porphyrin complexes, (por)Fe(OSiMe 3 ) and (por)Fe(OCH 2 SiMe 3 ) (por = OEP, TPP, TpivPP) have been synthesized and characterized by spectroscopy. The magnetic susceptibility data obtained by the Evans method for the complexes indicate that they are high-spin or intermediate-spin species, depending on the axial ligand. The X-ray crystal structures of (OEP)Fe(OSiMe 3 ), (TPP)Fe(OSiMe 3 ), (TpivPP)Fe(OSiMe 3 ), and (TPP)Fe(OCH 2 SiMe 3 ) revealed five-coordinate squa