91573-50-1Relevant academic research and scientific papers
Contributions to the Chemistry of Boron, 164 (Benzyl-tert-butylamino)boranes and Bis(benzyl-tert-butylamino)boron(1+) Salts
Koelle, Peter,Noeth, Heinrich
, p. 313 - 324 (2007/10/02)
The introduction of one amino group into BX3 (X = Cl, Br) is readily achieved by reacting benzyl-tert-butylamine, RR'NH, with BX3 to give RR'N-BX2.However, (RR'N)2BX can only be prepared via the metal amide LiNRR'(5).The corresponding aminoboron fluorides are readily obtained from BF3*O(C2H5)2 and 5.Amination of (RR'N)2BX (X = F, Cl) by 5 was not achieved. (RR'N)2BH results, however, from the reaction of BBr4 with excess 5. - Bis(amino)boron salts are obtained by halide abstraction from (RR'N)2BHal with AlCl3 or BBr3.The structure of AlCl4 (10) was determined by X-ray crystallography.The cation possesses an allene type structure with a linear NBN skeleton and rather short BN bonds (1.332 Angstroem).This bond is 0.08 Angstroem shorter than in (RR'N)2BCl (6a), whose structure has also been determined.The barrier to rotation of the BN bonds of the cation has been estimated to ΔG* = 82 +/- 3 kJ mol-1.
