An evaluation of the rotational barrier about the BN bond of 1-aminoborepins
作者:Arthur J. Ashe、Wolfram Klein、Roger Rousseau
DOI:10.1016/0022-328x(94)80025-1
日期:1994.4
13C NMR spectroscopy has been used to determined the barriers to rotationabout the BN bonds of 1-(N-benzyl-N-methylamino)borepin and 1-(N-benzyl-N-methylamino)-4,5-dihydroborepin as 18 and 19.8 kcal mol−1, respectively. The corresponding rotationalbarriers of a variety of aminoboranes have been calculated using the semi-empirical AM1 method.
已使用13 C NMR光谱确定1-(N-苄基-N-甲基氨基)borepin和1-(N-苄基-N-甲基氨基)-4,5-二氢硼庚烷的BN键旋转的势垒分别为18和19.8kcal mol -1。已使用半经验AM1方法计算了各种氨基硼烷的相应旋转势垒。
Evaluation of the aromaticity of borepin: synthesis and properties of 1-substituted borepins
作者:Arthur J. Ashe、Wolfram Klein、Roger Rousseau
DOI:10.1021/om00032a051
日期:1993.8
The reaction of 1,1-dibutylstannepin with BCl3 gave 1-chloroborepin, which has been converted to a variety of 1-substituted borepins, C6H6BX, where X = OH, O1/2, OCH3, 2,4,6-Me3C6H2, CH2CH2CH2NMe2, F, NH2, N(CH2)5, N(iPr)2, H. 1-Chloroborepin and 1-aminoborepin have been investigated by ab initio methods. All borepins have been studied using H-1 NMR, B-11 NMR, and C-13 NMR spectroscopy. The X-ray crystal structure of 1-chloroborepin gives evidence of a pi-delocalized structure. All properties are discussed in terms of the aromatic character of the borepin ring system.
Ashe, Arthur J. III; Kampf, Jeff W.; Klein, Wolfram, Angewandte Chemie, 1993, vol. 105, p. 1112 - 1113
作者:Ashe, Arthur J. III、Kampf, Jeff W.、Klein, Wolfram、Rousseau, Roger