Journal of Cluster Science

, Volume 29, Issue 2, pp 319–323 | Cite as

An Uncommon Complex Cation Stabilized by a Niobium Cluster Anion: [Al(CH3CN)5Br][Nb6Cl 12 i Br 6 a ]·3CH3CN

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Abstract

A new niobium cluster compound, [Al(CH3CN)5Br][Nb6Cl 12 i Br 6 a ]·3CH3CN was synthesized and characterized by single-crystal X-ray diffraction and IR spectroscopy. Crystals of this cluster compound have triclinic symmetry with a = 8.8759(7), b = 12.300(1), c = 12.585(1) Å, α = 83.240(4), β = 71.231(4), and γ = 72.474(4)°. In this compound the charge of the mixed halide cluster anion, [Nb6Cl 12 i Br 6 a ]2−, is compensated by that of the heteroleptic [Al(CH3CN)5Br]2+ complex cation, which has close to C4v symmetry. This complex cation can be considered as rather uncommon, since before only two compounds were known, which contain the chlorido analogue.

Keywords

Niobium Octahedral hexaniobium cluster Aluminum Halide Synthesis X-ray structure 
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Notes

Acknowledgements

The authors thank Dr. A. Villinger (Universität Rostock) for taking care of the X-ray facilities. Financial support from the Deutsche Forschungsgemeinschaft through the SPP 1708 is gratefully acknowledged (KO 1616/8-1).

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© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Institute of ChemistryUniversity of RostockRostockGermany

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