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Issue 28, 2013
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Mixed valence η6-arene cobalt(I) and cobalt(II) compound

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The first carbonyl free mixed valence cobalt(I)/cobalt(II) compound [2{L2Co(I)(η6-C7H8)}]2+ [Co(II)2Cl6]2− (1) [L = PhC(NtBu)2SiCl] was obtained by the reaction of four equivalents of anhydrous CoCl2 with five equivalents of N-heterocyclic chlorosilylene L. In contrast, the reaction of L with CoBr2 yielded [L2CoBr2] (2). Compound 1 was formed by the cleavage of Co–Cl bonds, the reduction of Co(II) to Co(I) and by the coordination of a toluene molecule. The chlorosilylene (L) functions as a reducing agent as well as a neutral σ-donor ligand. The toluene molecule coordinates to the Co(I) atom in an η6-fashion.

Graphical abstract: Mixed valence η6-arene cobalt(i) and cobalt(ii) compound

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Publication details

The article was received on 09 Apr 2013, accepted on 13 May 2013 and first published on 14 May 2013

Article type: Paper
DOI: 10.1039/C3DT50939G
Citation: Dalton Trans., 2013,42, 10277-10281
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    Mixed valence η6-arene cobalt(I) and cobalt(II) compound

    R. Azhakar, R. S. Ghadwal, H. W. Roesky, J. Hey, L. Krause and D. Stalke, Dalton Trans., 2013, 42, 10277
    DOI: 10.1039/C3DT50939G

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