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Issue 26, 2018
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Ferrate(II) complexes with redox-active formazanate ligands

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The synthesis of mono(formazanate) iron complexes is described. In the presence of tetrabutylammonium halides, salt metathesis reactions afford the ferrate(II) complexes [Bu4N][LFeX2] (L = PhNNC(p-tol)NNPh; X = Cl, Br) in good yield, and the products are characterized in detail. The high-spin ferrate(II) complexes show cyclic voltammograms that are consistent with reversible, ligand-based one-electron reduction. The halides in these ferrate(II) compounds are labile, and are displaced by 4-methoxyphenyl isocyanide (4 equiv.) as evidenced by formation of the low-spin, cationic octahedral complex [LFe(CNC6H4(p-OMe))4][Br]. Thus, a straightforward route to mono(formazanate) iron(II) complexes is established.

Graphical abstract: Ferrate(ii) complexes with redox-active formazanate ligands

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Publication details

The article was received on 21 Apr 2018, accepted on 12 Jun 2018 and first published on 13 Jun 2018

Article type: Paper
DOI: 10.1039/C8DT01597J
Citation: Dalton Trans., 2018,47, 8817-8823
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    Ferrate(II) complexes with redox-active formazanate ligands

    F. Milocco, S. Demeshko, F. Meyer and E. Otten, Dalton Trans., 2018, 47, 8817
    DOI: 10.1039/C8DT01597J

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