Phosphasilirenes, Three‐Membered Rings Containing PC Double Bonds

Abstract

The similarity of phosphaalkynes and acetylenes is revealed in the [2 + 1] addition of di(tert-butyl)silanediyl. Reaction of RCP and tBu2Si: results in the formation of the isolable title compounds 1 (a, R  tBu; b, adamantyl), the first three-membered ring compounds containing a PC bond. A W(CO)5 adduct of 1b proved to be sufficiently stable for an X-ray structure analysis.