... FORMATION AND REACTIVITY OF A STRONrLY HYDROGEN BONDED FLUORIDE-4- CYANOPHENOL COTIPLEX James H. Clark* and Nicholas DS Owen Department of Chemistry, University of York, Heslington, York Y01 5DD, England. Summary - Potassium fluoride forms a thermally stable stronqZu h.ydroqen bonded complex with 4-cNpheno2. The complex is a very useful substrate for the formation of biaryZ ethers via denitration or dechZorination. ...