salts of acyclic and cyclic oximes, eliminating LiF and forming O-fluorosilyloximes and O, O′-fluorosilyldioximes in a molar ratio 1 : 2. The NO bond is cleaved in the reaction of O-fluorosilyloximes with butyllithium. Bis(tert.-butylfluorophenyl)-disiloxane and tris(tert.-butyl- phenyl)-cyclo-trisiloxane have been isolated from these reactions. NMR and mass spectra are reported for all compounds.