Mixed valence η6-arene cobalt(I) and cobalt(II) compound

Ramachandran Azhakar; Rajendra S. Ghadwal; Herbert W. Roesky; Jakob Hey; Lennard Krause; Dietmar Stalke

doi:10.1039/C3DT50939G

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Mixed valence η⁶-arene cobalt(i) and cobalt(ii) compound†‡

Ramachandran Azhakar,^a Rajendra S. Ghadwal,*^a Herbert W. Roesky,*^a Jakob Hey,^a Lennard Krause^a and Dietmar Stalke*^a

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* Corresponding authors

^a Institut für Anorganische Chemie, Universität Göttingen, Tammannstrasse 4, 37077 Göttingen, Germany
E-mail: [email protected], [email protected], [email protected]

Abstract

The first carbonyl free mixed valence cobalt(I)/cobalt(II) compound [2{L₂Co(I)(η⁶-C₇H₈)}]²⁺ [Co(II)₂Cl₆]²⁻ (1) [L = PhC(N^tBu)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.

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Article information

DOI: https://doi.org/10.1039/C3DT50939G
Article type: Paper
Submitted: 09 Apr 2013
Accepted: 13 May 2013
First published: 14 May 2013

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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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