ChemInform Abstract: Lithio‐di‐tert‐butylfluorosilylphenylphosphane. A (SiFLiP)2 Eight‐Membered Ring in the Crystal.

Reaction of the phosphane (I) with the lithium reagent (II) gives the eight‐membered ring (III) which releases LiF at temperatures above 0°C, forming the four‐membered ring (IV).