摘要
我们测定了3-溴咔唑,3,6二溴咔唑,9-(2’,3’-环氧丙基)咔唑,9-(2’,3’-环氧丙基)-3-溴咔唑和9-(2’,3’-环氧丙基)-3,6-二溴咔唑(后分别简称化合物1,2,3,4,5)的宽带去偶谱、偏共振谱和非去偶谱。通过对它们的13C核磁共振谱的数据分析比较,就以下几方面进行了归纳总结:①信号的归属方法;②环氧丙基的13C化学位移范围;③偶合常数的范围,这些归纳总结有助于确定此类化合物的价键特征和结构。
In this paper the^(13)C NMR research of 3-bromo-carbazole,3,6-dibro-mo-carbazole,9-(2’,3’-epoxypropyl)carbazole,9-(2’,3’-epoxypropyl)-3-bromo-carbazole and 9-(2’,3’-epoxypropyl)-3,6-dibromo-carbazole has been made.The proton noise decoupled,proton off-resonance decoupled and^(13)C-1H coupled NMR spectra for five carbazole derivatives are measured.The^(13)C NMR spectra data of them are analysed and compared.The following,points are summarized:(1)assignment methods of the resonance signals in^(13)C NMR;(2)chemical shift range of epoxypropyl;(3)the range of coupling constants.The points described may be useful for determining valence bond characteristic and structure of these compounds.The experimental results show that carbon-13 chemical shifts,one-bond coupling and two-bond coupling constants of carbazole derivatives have fixed regularity.Therefore,they not only provide a powerful basis for determining structure but also bear some significance for study of^(13)C NMR of carbazole derivatives and complexes.
作者
陈亮
胡玉仙
Chen Liang;Hu Yuxian(Department of Chemistry,Shanxi University,Tai yuan)
出处
《高等学校化学学报》
SCIE
EI
CAS
1984年第1期73-76,共4页
Chemical Journal of Chinese Universities