Features of Cobalt(II) Complexation with Azaheteracyclic Ligands in the Presence of a Monohydroxy-Substituted Derivative of Closo-Dodecaborate Anion

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Resumo

Cobalt(II) complexation with azaheterocyclic ligands L (L = 2,2ʹ-bipyridyl (bipy), 1,10-phenanthroline (phen) and 2,2ʹ-bipyridylamine (bpa)) in the presence of a monohydroxy-substituted derivative of the closo-dodecaborate anion [B12H11OH]2– has been studied. Depending on the nature of the organic ligand and the synthesis conditions, the coordination compounds [CoIII(bipy)2Cl2]2[B12H11OH], [CoII(phen)3][B12H11OH] and [CoII(bipy)3][B12H11OH] with the boron cluster anion as a counterion, as well as the mixed-ligand complex [CoII(bpa)2Cl2] of a known structure, have been obtained and structurally characterized. For the first time, a redox reaction leading to the formation of a cobalt(III) complex in air has been observed for a system containing cobalt(II) and a substituted derivative of the boron cluster anion without the introduction of additional oxidizing agents.

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Sobre autores

E. Matveev

Lomonosov Institute of Fine Chemical Technologies, MIREA — Russian Technological University; Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences

Autor responsável pela correspondência
Email: korolencko0110@yandex.ru
Rússia, 86, Vernadsky Ave., Moscow, 119571; 31, Leninsky Ave., Moscow, 119991

S. Nikiforova

Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences

Email: korolencko0110@yandex.ru
Rússia, 31, Leninsky Ave., Moscow, 119991

A. Kubasov

Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences

Email: korolencko0110@yandex.ru
Rússia, 31, Leninsky Ave., Moscow, 119991

E. Malinina

Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences

Email: korolencko0110@yandex.ru
Rússia, 31, Leninsky Ave., Moscow, 119991

K. Zhizhin

Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences

Email: korolencko0110@yandex.ru
Rússia, 31, Leninsky Ave., Moscow, 119991

N. Kuznetsov

Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences

Email: korolencko0110@yandex.ru
Rússia, 31, Leninsky Ave., Moscow, 119991

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2. Scheme 1. Interaction of cobalt(II) with azaheterocycles L in the presence of [B12H11OH]2- anion.

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3. Fig. 1. Structure of the compound [CoIII(Bipy)2Cl2]2[B12H11OH] (1 ∙ 5CH3CN), the hydroxo groups of the anion are disordered at six positions (a); fragment of crystal packing in 1 ∙ CN (b). Solvent molecules are not shown.

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4. Fig. 2. Structure of the compound [CoII(Phen)3][B12H11OH] (2 ∙ 2.75CH3CN) (a); crystallographically independent part of the hexagonal cell (b); crystal packing of 2 ∙ 2.75CH3CN (c). Solvent molecules are not shown.

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5. Scheme 2. Synthesis of complex 4.

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6. Fig. 3. Structure of the compound [CoII(Bipy)3][B12H11OH] (4), the hydroxo groups of the anion are disordered at three positions (a); fragment of crystal packing in 4 (b).

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