NMR-STUDIES ON AMINATED DINITROBENZOFUROXAN AND DINITROBENZOFURAZAN DERIVATIVES

被引:4
作者
GRUNDEMANN, E [1 ]
NICLAS, HJ [1 ]
GOHRMANN, B [1 ]
机构
[1] CHEMIE AG BITTERFELD WOLFEN,DIV RES,O-4400 BITTERFELD,GERMANY
来源
JOURNAL FUR PRAKTISCHE CHEMIE | 1990年 / 332卷 / 06期
关键词
D O I
10.1002/prac.19903320611
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
The C-13-n.m.r. chemical shifts of sigma-N-C-bonded Meisenheimer complexes 3, 5 and their corresponding aminated dinitrobenzofurazans 4 and dinitrobenzofuroxans 6 were determined. The chemical shifts are discussed as a function of electronic substituent effects. The assignment was performed by means of H-1-C-13 coupling constants and by comparison with che C-13-chemical shifts of appropriate model compounds. The C-13-n.m.r. spectra of Meisenheimer tomplexes 3 reveal doubling of signals, indicating a hindered rotation at the N-CHO bond.
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收藏
页码:931 / 938
页数:8
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