摘要
本文测定了三个3(或4)-取代苯甲亚氨酸乙酯(1)和八个N-氰甲基-3(或4)-取代苯甲亚氨酸乙酯(2)的^(13)C-NMR谱。归属了1 和2和各碳化学位移。求得了的取代基化学位移(substituent Chemical Shift,SCS)。碳-13化学位移与单取代苯的取代基化学位移(SCS)的相关分析表明:4-取代苯甲亚氨酸酯1 b～g和2b～e中,除C_(2,6)外,其他各芳碳的化学位移值与加和规则基本相符;3-取代苯甲亚氨酸酯1h～j和2f～h中,除C_1外,其他各芳碳的化学位移值与加和规则基本相符。另外,本文还进行了碳-13化学位移与σ_(I)/σ_(R)~O和F/M的双参数相关分析。
The 13C- NMR spectra of three ethyl 3 (or 4) - x-benzenecarboximidates ( 1 ) and eight ethyl N-cyanomethyl -3 (or 4) -x-benzenecarboximidates (2) were determined. All 13C chemical shifts were assigned. The substituent chemical shifts (SCS) of -C = NCH2CN was obtained. Correlations of the 13C
chemical shifts of aromatic carbons with the appropriate substituent chemical shifts ( SCS) for monosubstituted benzenes show nonadditivity at C-2, 6 in compounds lb-g and 2b-e, at C-l in compounds lh-j and 2f--h. Dual subslituent parameter correlations of the 13C chemical shifts were also performed in this paper.
出处
《波谱学杂志》
CAS
CSCD
1989年第4期423-430,共8页
Chinese Journal of Magnetic Resonance
基金
国家自然科学基金资助项目
关键词
苯甲氨酸酯
取代基
化学位移
Imidate
Correlation analysis
Substituent chemical shift (SCS)
Substituent constant: (13)~C-NMR.
