First X-ray structure determination of a bismuthio ylide: 4,4-dimethyl-2,6-dioxo-1-triphenylbismuthiocyclohexanide
Abstract
The first X-ray structure analysis of a bismuthio ylide has been made for 4,4-dimethyl-2,6-dioxo-1 -triphenylbismuthiocyclohexanide. The Bi–Cylide bond is 2.16 Å, only 0.05–0.06 Å shorter than the Bi–CPh single bond, revealing that the Bi–Cylide bond is polarized as C––Bi+ or O––CC–Bi+ with little double bond character between the Bi and the ylidic carbon.