Simplified Synthesis and Structural Study of { Ta6Br12} Clusters |
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| Authors: | Maxim N. Sokolov,Pavel A. Abramov,Maxim A. Mikhailov,Eugenia V. Peresypkina,Alexander V. Virovets,Vladimir P. Fedin |
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| Affiliation: | 1. A. 2. V. Nikolaev Institute of Inorganic Chemistry, Russian Academy of Sciences, Lavrentiev Avenue 3, Novosibirsk, 630090, Russia;3. Novosibirsk State University, ul. Pirogova 3,Novosibirsk, 630090, Russia |
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| Abstract: | Direct reaction of stoichiometric amounts of KBr, tantalum and bromine at 720 °C, followed by extraction and crystallization gives Ta6Br14 · 7H2O (1) . This compound slowly aquates into [(Ta6Br12)(H2O)6]2+, which crystallized as mixed Cs+/Br– ( 2 ), Cl– ( 3 ) and SO42– ( 4 ) salts. In Bu4NBr melt, 1 undergoes oxidation into (Bu4N)2[(Ta6Br12)Br6] ( 5 ). Reaction of 1 with dimethylsulfoxide also induces oxidation of the { Ta6Br12} 2+ core into { Ta6Br12} 4+, and the corresponding complex [(Ta6Br12)(dmso)2Cl4] · iPrOH · 4.8H2O ( 6 ) was isolated and structurally characterized. Molecular and crystal structures for 2 – 6 were determined. |
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| Keywords: | Cluster compounds Tantalum Bromine X‐ray diffraction IR spectroscopy |
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