Structural characterization of the μ-nitrido complex {[Fe(OEP)]₂N}

Abstract

The molecular structure of the μ-nitrido dimer, μ-nitrido-bis(2,3,7,8,12,13, 17,18-octaethylporphyrinato)iron, is reported. The axial Fe–N distances average to 1.657 (11) Å and the equatorial distances average to 2.005(5) Å. Although not required by symmetry, the two iron centers appear equivalent and are consistent with an assignment of a low-spin state and a formal oxidation state of +3.5. A comparison of this structure with other nitrido-bridged species is given.

$N$-bridged dimers of tetrapyrroles complexed by transition metals: syntheses, characterization methods, and uses as oxidation catalysts

“…(Table 2). of µ -nitrido diiron octaethylporphyrin 2 (bottom part) 24 . Hydrogen atoms are omitted for clarity.…”

“…Figure 4. Crystal structure of µ -nitrido diiron tetraphenylporphyrin 1 (upper part)21 and side-on and top-down view of µ -nitrido diiron octaethylporphyrin 2 (bottom part)24 . Hydrogen atoms are omitted for clarity.…”

Binuclear Highly Distorted Iron(III) Porphyrins Bridged by the Dianions of Hydroquinones: Role of the Bridge in Electronic Communication

“…Metalloporphyrins have been shown to display a wide range of dimeric structures in which a ligand bridges between two metal centres. For examples, well‐structured porphinatoiron(III) dimers are formed in which oxo, hydroxo, nitrido, carbido, sulfato, peroxo, imidazolato or pyrazine residues serve as bridges between the two metal centres . Several covalently linked metalloporphyrin dimers have also been reported in which a direct metal–ligand–metal bridge may or may not be present .…”