Molecular Structures of Complexes of Trimethylamine with Boron Trichloride and Boron Tribromide as Determined by Gas Electron Diffraction
- 1 July 1980
- journal article
- Published by Oxford University Press (OUP) in Bulletin of the Chemical Society of Japan
- Vol. 53 (7) , 1908-1913
- https://doi.org/10.1246/bcsj.53.1908
Abstract
The molecular structures of trimethylamine-boron trichloride (CH3)3N·BCl3 and trimethylamine-boron tribromide (CH3)3N·BBr3 were determined from gas electron diffraction and vibrational-spectroscopic data. The molecular parameters and their uncertainties for (CH3)3N·BCl3 were rg(B–Cl)=1.836±0.002 Å, rg(N–B)=1.652±0.009 Å, rg(C–N)=1.497±0.003 Å, rg(C–H)=1.107±0.005 Å, ∠ClBCl=110.9±0.2°, ∠CNC=108.1±0.3°, while those for (CH3)3N·BBr3 were rg(B–Br)=2.001±0.003 Å, rg(N–B)=1.663±0.013 Å, rg(C–N)=1.500±0.005 Å, rg(C–H)=1.095±0.007 Å, ∠BrBBr=110.3±0.3°, ∠CNC=107.8±0.5°. The potential barriers around the N–B bonds in (CH3)3N·BCl3 and (CH3)3N·BBr3 were also estimated to be higher than 18 kcal mol−1 and about 12 kcal mol−1 respectively.Keywords
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