Abstract
Cs2Re6S6Br8 (trigonal, a = 10.001(5) Å, c = 14.676(5) Å) exhibits the same structure as Cs2Mo6Cl8Br6 and Cs2Mo6Br14 that were described in a noncentro-and centrosymmetric space groups, respectively. The structure has been refined in P31c space group from a single crystal of actual composition Cs1.95(1)Re6S5.82(3)Br8.19(3) close to the cesium-rich end of the solid solution Cs2Re6S6Br8 — CsRe6S5Br9. The centrosymmetry is respected by almost all the atoms of the asymmetric unit, but it is clearly broken by significant differences in the S/Br statistical distribution of the disordered “inner” ligands around the Re6 cluster. Structural refinements from data collected at 100 K revealed that the Cs cation disorder is static. From the structure refinements, the stable isomers of the [Re6S6Br2] and [Re6S5Br3] cluster cores have been unambiguously determined.
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Dedicated to Prof. V. E. Fedorov on the Occasion of his 70th Birthday
The text was submitted by the authors in English, Zhurnal Strukturnoi Khimii, Vol. 48, No. 4, pp. 731–739, July–August, 2007.
Original Russian Text Copyright © 2007 by G. Pilet, S. Cordier, C. Perrin, and A. Perrin
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Pilet, G., Cordier, S., Perrin, C. et al. Single-crystal structure of Cs2Re6S6Br8 rhenium thiobromide with acentric Re6 octahedral cluster units. J Struct Chem 48, 680–689 (2007). https://doi.org/10.1007/s10947-007-0102-0
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DOI: https://doi.org/10.1007/s10947-007-0102-0