Neutrale Bora-Silatropie an B-Halogen-substituierten Boryl-bis(silyl)hydroxylaminen

Neutral Rearrangement between Boryl and Silyl Groups in B-Halogenosubstituted Boryl-bis(silyl)hydroxylamines Dihalogenboranes, RBX₂, react with lithiated N,O-Bis(trimethylsilyl)hydroxylamine to give B-halogeno-borylhydroxylamines RB(X)ON(SiMe₃)₂: X = F, R = Trip (Trip = 2,4,6-triisopropylphenyl) ( I a ), N(SiMe₃)₂ ( I b ), N(CHMe₂)₂ ( I c ), N(SiMe₃)Dip (Dip = 2,6-diisopropylphenyl) ( I d ) and X = Cl, R = N(SiMe₃)₂ ( I e ). Depending upon the substituents on the boron atom a dyotropic rearrangement can be effected which transforms the compounds I a , I b und I e into the isomeric borylhydroxylamines RB(X)N(SiMe₃)OSiMe₃ II a , II b and II e . The compounds are characterized by their m. s. and n. m. r. (¹H, ¹¹B, ¹³C, ¹⁹F, ²⁹Si) spectra and by elemental analyses.