μ-Oxido-bis({4,4′-dibromo-2,2′-ethane-1,2-diylbis(nitrilomethylidyne)]diphenolato}iron(III))

Abstract

In the title compound, [Fe2(C16H12Br2N2O2)2O], the complete mol­ecule is generated by twofold symmetry, with the bridging O atom, which links the iron centres, lying on the roatation rotation axis. The Fe(III) ion is chelated by the N,N,O,O-tetra­dentate Schiff base dianion, resulting in an FeN2O3 square-based pyramid, with the two N atoms in the basal plane.

Mononuclear and dinuclear complexes of manganese(iii) and Iron(iii) supported by 2-salicyloylhydrazono-1,3-dithiane ligand: synthesis, characterization and magnetic properties

“…Also, the FeN 2 O 2 coordination plane in each iron III is oriented trans to the other relative to the oxo bridge, having a Fe-O-Fe bond angle of 167.1(2)u, which is in the normal range (135-180u) found in other closely related m-oxo monobridged diiron complexes, where this angle is usually dominated by the steric parameters of the chelated ligands. 19,[32][33][34][35] The Fe … Fe distance in 6 (3.475 A ˚) is in the same range as those already reported for complexes with Fe-O-Fe cores (3.39-3.56 A ˚). 17,24,33,36 The Fe-(m-O) bond lengths observed [Fe1-O9 1.747(3), Fe2-O9 1.750(3) A ˚] are in the range found for other (m-oxo)diiron III complexes (1.75-1.80 A ˚)17,20,33,37-39 but significantly shorter than that found in Fe-(m-CH 3 O) of complex 5 (1.975(2) A ˚).…”

Autocatalytic O2Cleavage by an OCO3–Trianionic Pincer CrIIIComplex: Isolation and Characterization of the Autocatalytic Intermediate [CrIV]2(μ-O) Dimer

“…Few structural details of relevant species are available; [(N 3 )(P)Mn IV ] 2 (μ-O) , is the lone example derived from a known oxidation catalyst. Noncatalytic linear Mn–O–Mn complexes have been structurally characterized with Mn in the +2/+2, +3/+3, − +3/+4, and +4/+4 ,,,, oxidation states. Similarly for (L)Cr–O–Cr(L) (L = salen or por) intermediates that form during catalysis, the primary characterization data are mass spectrometric. , A defining characteristic of most linear Cr–O–Cr and Mn–O–Mn units is a strong Soret band (ε = 1000–4000 M –1 cm –1 ). ,,,,,,− X-ray characterization of linear Cr–O–Cr complexes is known for Cr in the +2/+3, +3/+3, , +3/+4, and +5/+5 , oxidation states, but none of these compounds are oxidation catalysts.…”