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Issue 37, 2006
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Double half-cubane copper(II) complexes available from copper(II) 1,1,1,5,5,5-hexafluoropentane-2,4-dionate dissolved in formamides

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Abstract

Tetranuclear copper(II) complexes were obtained after simply dissolving [Cu(hfac)2] in formamidemethanol mixed solvents (Hhfac = 1,1,1,5,5,5-hexafluoropentane-2,4-dione). X-Ray diffraction studies revealed that they possessed a tetranuclear double half-cubane core sandwiched with two trianionic ligands from 2,4,6-tris(trifluoromethyl)tetrahydropyran-2,4,6-triol (H3ttpt). Complexes [Cu4(ttpt)2(hfac)2(dmf)2.5], [Cu4(ttpt)2(tfa)2(def)4], and [Cu4(ttpt)2(hfac)2(H2O)4](fa) were prepared from N,N-dimethylformamide(dmf)–MeOH, N,N-diethylformamide (def)–MeOH, and formamide(fa)–MeOH (Htfa = trifluoroacetic acid), respectively. A possible mechanism is proposed where a templated aldol-type reaction takes place between hfac and 1,1,1-trifluoroacetonate. Magnetic measurements revealed the presence of antiferromagnetic interaction in the Cu4O6 core.

Graphical abstract: Double half-cubane copper(ii) complexes available from copper(ii) 1,1,1,5,5,5-hexafluoropentane-2,4-dionate dissolved in formamides

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Publication details

The article was received on 28 Jun 2006, accepted on 31 Jul 2006 and first published on 14 Aug 2006


Article type: Paper
DOI: 10.1039/B609128H
Citation: Dalton Trans., 2006,0, 4438-4443
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    Double half-cubane copper(II) complexes available from copper(II) 1,1,1,5,5,5-hexafluoropentane-2,4-dionate dissolved in formamides

    Y. Morishita, T. Kogane, T. Nogami and T. Ishida, Dalton Trans., 2006, 0, 4438
    DOI: 10.1039/B609128H

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