摘要
通过测定Ｒｆ值对比研究了二茂铁亚胺及其环汞化合物的色谱亲和性，发现环汞化合物比未汞化的二茂铁亚胺具有较高Ｒｆ值，并用Ｎ→Ｈｇ分子内配位作用给予解释，分析取代基效应表明，亚胺氮上电子密度越高，Ｒｆ值越小，紫外可见光谱表明，环汞化合物人子中存在有Ｎ→Ｈｇ分子内配位作用，研究了Ｎ－Ａｒ环和亚胺碳上的取代基效应对紫外光谱的影响，与Ｎ－Ａｒ环上无取代基时相比。
The comparative studies on the chromatographic affinity of ferrocenylimines and their derivatives of mercury have showed that the cyclomercurated compounds exhibit higher Rf values than the corresponding starting ferrocenylimines,which has been explained in terms of the N→Hg intramolecular coordination,The substituent effects on the Rf values show that the higher the electron density in the imino nitrogen atom is,the lower the R_f value is.The examination of UV-Vis spectra of these compounds showed that an intramolecular coordination,N→Hg,exists in the molecules of cyclomercurated compounds,The effect of the substituents situated at the carbon atom of the imine group and in the N-phenyl ring on the UV-Vis spectra was investigated.Compared with the λ_(max) of the ferrocenylimine in which there is no substituent in N-phenyl ring,a good linear relationship was found between the △λ_(max) of the π-π￣* CT band and the Hammett-Brown constants σ￣+.In addition,the application of IR rules for characterizing the structures of substituted ferrocenes to the system studied has also been examined.
出处
《高等学校化学学报》
CSCD
北大核心
1996年第6期901-905,共5页
Chemical Journal of Chinese Universities
基金
国家自然科学基金
关键词
二茂铁亚胺
环汞化合物
红外光谱
薄层色谱
Ferrocenylimines
Cyclomercurated compounds
Chromatographic features
UV-Vis spectra
IR spectra
