REAKTION VON TRIFLUORBORAN, -PHOSPHAN UND FLUORSILANEN MIT LITHIIERTEN BIS(SILYL)AMINEN

Abstract

Tris(silyl)amines with three different silylgroups (7–10) and a difluoroboryl-bis(di-tert-butylfluorosilyl)amine (11) are prepared in the reaction of lithiated bis(silyl)amines (2–6) with fluorosilanes and BF₃ In the bulky substituted tris(silyl)amines 9 and 10 a rotational barrier is observed by NMR-spectroscopy at room temperature. An fluorosilyl substituted aminoiminophosphane (12) is obtained in the reaction of lithium-bis(di-tert-butylfluorosilyl)amide (6) with F₂PNCMe₃SiMe.₃ The lithiated bis(silyl)amines 5 and 6 react with PF₃ to give the PF₂-substituted bis(silyl)amines 13 and 14. Above room temperature 13 forms the cyclodiphosphazene (15) and (CMe₃)₂SiF₂.

Key Words:

• Tris(silyl)amines
• isomers
• fluoroboryl-bis(fluorosilyl)amine
• iminophosphane
• cyclodiphosphazane