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- W2016856413 abstract "Wahrend mit Benzyl-tert-butylamin, RR′NH, in BCl3 oder BBr3 eine Aminogruppe leicht zu Aminoboranen RR′NBX2 (X = Cl, Br) einzufuhren ist, erhalt man Bis(amino)borane (RR′N)2BX (X = Cl, Br) nur bei Verwendung des Amids LiNRR′ (5). Die entsprechenden Aminoborfluoride entstehen aus BF3. O(C2H5)2 und 5. Eine Aminierung von (RR′N)2BX (X = F, Cl) mit 5 zu B(NRR′)3 gelingt nicht. Die Reaktion von [(RR′N)2B]BBr4 mit uberschussigem 5 fuhrt zu (RR′N)2BH. – Bis(amino)bor-Salze sind durch Halogenid-Abspaltung mit AlCl3 oder BBr3 aus (RR′N)2BHal leicht zugangig. Die Rontgenstrukturanalyse von [(RR′N)2B]AlCl4 (10) zeigt ein Allen-analoges Kation mit linearer NBN-Struktur und kurzer BN-Bindung (1.332 A). Die BN-Bindung verkurzt sich beim Ubergang von (RR′N)2BCl (6a), dessen Struktur ebenfalls rotgenographisch ermittelt wurde, in 10 um 0.08 A. Die Rotationsbarriere der BN-Bindung im Kation betragt ΔG* = 82 ± 3 kJ mol−1.Contribution to the Chemistry of Boron, 164. (Benzyl-tert-butylamino)boranes and Bis(benzyl-tert-butylamino)boron(1+) SaltsThe 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′NBX2. 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 [(RR′N)2B]BBr4 with excess 5. – Bis(amino)boron salts are obtained by halide abstraction from (RR′N)2BHal with AlCl3 or BBr3. The structure of [(RR′N)2B]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 A). This bond is 0.08 A 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 be ΔG* = 82 ± 3 kJ mol−1." @default.
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- W2016856413 title "Beiträge zur Chemie des Bors, 164. Über (Benzyl‐ <i>tert</i> ‐butylamino)borane und Bis(benzyl‐ <i>tert</i> ‐butylamino)bor(1+)‐Salze" @default.
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- W2016856413 doi "https://doi.org/10.1002/cber.19861190127" @default.
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