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Issue 37, 2014
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Vanadium complexes with multidentate amine bisphenols

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The reaction of VO(acac)2 (acac = acetyl acetonate) with tripodal glycine bisphenol H3L1 under an ambient atmosphere yields a hexacoordinated vanadium(IV) complex [V(acac)(L1)] (1). The corresponding reactions with tripodal 2-propanolamine bisphenol H3L2 and potentially pentadentate ethoxyethanolamine bisphenol H3L3 lead to the oxidation of the metal centre and formation of mononuclear oxovanadium(V) complexes [VO(L2)] (2) and [VO(L3)] (3), respectively. Alternatively, these latter two complexes can be prepared using VOSO4·5H2O or VO(OPr)3 as a precursor. The CV of 1 in an ACN solution shows a reversible one-electron process at E1/2 = +1.18 V, whereas 2 and 3 have an irreversible redox response at −1.6 V and −1.2 V, respectively. Complexes 2 and 3 show moderate activity in the epoxidation of cis-cyclooctene by tert-BuOOH at 50 °C.

Graphical abstract: Vanadium complexes with multidentate amine bisphenols

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The article was received on 04 Apr 2014, accepted on 29 Jul 2014 and first published on 30 Jul 2014

Article type: Paper
DOI: 10.1039/C4DT01007H
Author version available: Download Author version (PDF)
Citation: Dalton Trans., 2014,43, 14022-14028
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    Vanadium complexes with multidentate amine bisphenols

    M. M. Hänninen, A. Peuronen, P. Damlin, V. Tyystjärvi, H. Kivelä and A. Lehtonen, Dalton Trans., 2014, 43, 14022
    DOI: 10.1039/C4DT01007H

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