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Synthesis, Characterization, and Dioxygen Reactivity of Tetracarboxylate-Bridged Diiron(II) Complexes with Coordinated Substrates

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journal contribution
posted on 2003-12-29, 00:00 authored by Sungho Yoon, Stephen J. Lippard
The synthesis and characterization of [Fe2(μ-O2CArTol)4L2] complexes, where L is benzylamine or 4-methoxybenzylamine (BAp-OMe), are described. The reaction of the latter diiron(II) complex with dioxygen at −78 °C affords a metastable mixed-valent Fe(II)Fe(III) green intermediate. When O2 is introduced at ambient temperature, N-dealkyation occurs to yield anisaldehyde, eliminating N-oxidation as a viable pathway for the reaction. Use of [Fe2(μ-O2CArTοl)4(α-d1-BAp-OMe)2] allowed a deuterium kinetic isotope of ∼3 to be determined.