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Issue 4, 2005
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A linear trinuclear mixed valence vanadium(V/IV/V) complex: synthesis, characterization, and solution behavior

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Abstract

The reaction between vanadium(III) acetylacetonate and N-hexanoylsalicylhydrazide (H3hshz) yields a linear trinuclear mixed valence vanadium(V/IV/V) complex, V3O3(hshz)2(OEt)2, 1 (where hshz3− is a triply deprotonated trianionic N-hexanoyl salicylichydrazidate), with a pseudo C2 symmetry. A V(IV)O2+ group is at the center of complex 1 and is spanned by two terminal vanadium(V) ions with a square pyramidal geometry bridged via hydrazido ligands. In the crystalline form, the oxo group of the central vanadium(IV) ion is weakly coordinated to one of the terminal square pyramidal vanadium(V) ions of the neighboring trinuclear complex to form a dimeric structure. These dimers are linked via bis μ-alkoxo bridges to form a one-dimensional zigzag chain structure. In chloroform or methylene dichloride, the weak linkages between the trinuclear complexes present in the crystalline form are broken, and only the mixed valence trinuclear complex can be identified. In dimethyl sulfoxide or dimethylformamide, the trinuclear complex partially dissociates, and the unligated ligands remain in equilibrium with the trinuclear complex.

Graphical abstract: A linear trinuclear mixed valence vanadium(v/iv/v) complex: synthesis, characterization, and solution behavior

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Publication details

The article was received on 05 Jan 2005, accepted on 07 Jan 2005 and first published on 24 Jan 2005


Article type: Paper
DOI: 10.1039/B500169M
Citation: Dalton Trans., 2005,0, 797-803
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    A linear trinuclear mixed valence vanadium(V/IV/V) complex: synthesis, characterization, and solution behavior

    Y. Jin, H. Lee, M. Pyo and M. S. Lah, Dalton Trans., 2005, 0, 797
    DOI: 10.1039/B500169M

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