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Synthesis and characterization of a stable dibismuthene: evidence for a Bi-Bi double bond

, : Synthesis and characterization of a stable dibismuthene: evidence for a Bi-Bi double bond. Science 277: 80

Treatment of an overcrowded triselenatribismane, 2,4,6-tris(bis(trimethylsilyl)methyl)phenyl-1,3,5-triselena-2,4,6- tribismane, with hexamethylphosphorous triamide in toluene at 100[degree]C resulted in the quantitative formation of a stable dibismuthene [TbtBi[triple bond]BiTbt, where Tbt is 2,4,6-tris(bis(trimethylsilyl)methyl)phenyl], a compound containing a double bond formed between two bismuth atoms. The compound formed as deep purple crystals upon cooling. Ultraviolet-visible and Raman spectra, x-ray crystallographic structural analysis, and theoretical calculations provided evidence for the double bond character of the Bi-Bi bond. Copyright 1997 by the AAAS.


DOI: 10.1126/science.277.5322.78

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