AROMATIC SOLVENT-INDUCED SHIFTS IN THE H-1-NMR SPECTRA OF NITRONES
AROMATIC SOLVENT-INDUCED SHIFTS IN THE H-1-NMR SPECTRA OF NITRONES
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DOI：
10.1016/s0040-4020(01)88126-6
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发表时间：
1992-01-24
期刊：
影响因子：
2.1
通讯作者：
KESSELHEIM, HP
中科院分区：
文献类型：
--
作者：
AURICH, HG;FRANZKE, M;KESSELHEIM, HP
在模型化合物1-3在六氘代苯中的H-1-NMR谱中，在硝酮基团的E-侧的质子的信号比在Z-侧的质子的信号由于芳香族溶剂的作用更广泛地向更高的场移动。 利用这种效应，确认了Z-型的常见C，N-二烷基硝酮的存在。 然而，作为8和9的C-酰基硝酮以两种异构体形式存在，平衡受到溶剂的强烈影响。
In the H-1-NMR spectra of model compounds 1-3 in hexadeuteriobenzene the signals of protons at the E-side of the nitrone group are more extensively shifted to higher field by the effect of the aromatic solvent than the signals of protons at the Z-side. Utilizing this effect the existence of usual C,N-dialkylnitrones in the Z-form was confirmed. C-Acylnitrones as 8 and 9, however, exist in both of the isomeric forms, the equilibrium being strongly influenced by the solvent.