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Article

Hybrid halobismuthates: the unusual {[BiBr6]…[BiBr5]…[BiBr6]}8- anionic framework

Journal of Molecular Structure. 2019. Vol. 1195. P. 944-948.
Vitalii Yu. Kotov, Safiullina E. S., Ilyukhin A. B., Buikin P. A., Birin K. P., Yorov K. E.

New hybrid bromobismuthates of 1,1'-(1,4-phenylenebis(methylene))bis(n-methylpyridin-1-ium) 1 (n=4) and 2 (n=3) dications and halobismuthates of 1-{[4-(Hal-methyl)phenyl]methyl}-2-methylpyridin-1-ium) 3 (Hal=Br) and 4 (Hal=I) monocations have been synthesized and characterized. The [BiBr5]2- anion with structure unusual for halobismuthates and two [BiBr6]3- anions form a linear 0-D fragment in compound 2. The Bi-Br(ax) distance in [BiBr5]2- anion (2.587 Å) is rather short for usual bromobismuthates. The formation of the linear fragment in compound 2 and the presence of short Bi-Br(ax) bonds in its structure do not affect a value of optical band gap.