174620-53-2Relevant academic research and scientific papers
The 2,6-Diisopropyl-phenyl Group as a Bulky Substituent in Boron-Nitrogen Compounds. II
Luthin, W.,Stratmann, J.-G.,Elter, G.,Meller, A.,Heine, A.,Gornitzka, G.
, (2008/10/08)
Fluoro-bis(amino)boranes R'(Me2Si)N-BF-NHR (R=2,6-(Me2CH)2C6H3), R'=Me (Ia), CH2Me (Ib), CHMe2 (Ic), CMe3 (Id), SiMe3 (Ie), R (If) react with t-butyllithium (molar ratio 1:1) by elimination of HF to give the amino-imino-boranes (IIa-f). The thermal stabilities of the latter depend upon the steric requirement of the substituent R'. IIa-c and IIe dimerize to yield the diazaboretidines IIIa-c and IIIe. IId remains unchanged at 200° and above, and IIf isomerizes forming the B-Me substituted diazasilaboretidine IVf. If a twofold amount of t-butyllithium is employed, B-CMe3, substituted diazasilaboretidines (Va-f) are the main products. All compounds are characterized by elemental (C,H) analyses and their mass- and n.m.r. ((1)H, (13)C, (15)N (in part), (19)F, (29)Si) spectra. Characteristic i.r.-bands are reported for teh amino-imino-boranes (II). An X-ray structure analysis is presented for IVf.
