摘要
本文测定了12个甲醛缩氨基脲类化合物的^(15)N和^(13)C NMR谱,研究并对比了不同取代基对^(15)N和^(13)C化学位移的影响,结果表明:^(15)N化学位移对分子结构和取代基的电子效应更加敏感,变化范围更大.对N-苯甲醛缩氨基脲^(15)N化学位移与Hammatt取代常数σ的相关性进行了研究,并与苯胺的取代效应作了对比.
The 15N and 13C NMR chemical shifts of 12 carboxaldehyde semicarbazones and related compounds have been determined at the natural-abundance. The substituent effects on 15N and 13C chemical shifts were studied and compared with each other. The results show that the 15N chemical shifts are more sensitive to structural and electronic effects than 13C NMR.
The correlation of 15N chemical shifts for para-substituted N-penyl-carboxaldehyde semicarbazones with Hammett substituent constants (σ) was studied and compared with that of benzenamines.
出处
《波谱学杂志》
CAS
CSCD
1989年第1期65-70,共6页
Chinese Journal of Magnetic Resonance
