the lithium salts of amino-1,3-disiloxanes, (Me3C)2SiNH2–O–R (R = SiMe3, SiMe2Ph, SiF2CMe3) reacts with ClSiMe3, FSiMe2Ph or F3SiCMe3 under a 1,3-O-N-silyl groupmigration to give the 1-silylamino-1,3-disiloxanes 9–11. If the trimethylsilylgroup is substituted by SiMeF2, the difference between the isomers III′ and V′ is even smaller, 0.12 kcal/mol, and the barrier to reaction via the dyotropic transition