摘要
通过甲酰基二茂铁与取代水杨醛和氨反应,直接合成了含一个二茂铁的混合三聚产物,N,N′-二[2-羟基-5-取代苄烯]二茂铁甲二胺.茂环上碳原子的化学位移^(13)CNMR与苯环上R取代基的Hammett常数之间存在着很好的线性关系.循环伏安法测出的E_(1/2)也与Hammett常数之间存在着很好的线性关系.通过混合三聚反应,也合成了另一类含两个二茂铁化合物,N,N′-二[二茂铁甲烯]-2-羟基-5-特丁基苯甲二胺.~1H及^(13)CNMR表明,分子内由于氢键和立体效应的影响,导致两个茂环上的化学环境不等性.
The mixed trimeric compounds containing one ferrocene unit, N, N'-bis(2-
hydroxy-5-substituted benzylidene) ferrocenylmethylene diamine, have been synthe-
sized directly through the reaction between 1mol of ferrocenecarboxaldehyde and 2
mol of 5-substituted salicylaldehyde. A correlation between ^(13)C NMR chemical shifts of
carbon atoms in Cp ring and the Hammett constants (σ_m) has been found. The
oxidation potentials for these compounds, determined by cyclic voltammetry, have also
been studied. The other type of trimeric product containing two ferrocene units has
also been synthesized. Its ^(13)C NMR analysis showed that the chemical surroundings of
two ferrocene rings are different due to intramolecular hydrogen bonding and steric
effects.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
1989年第3期240-245,共6页
Acta Chimica Sinica
基金
国家自然科学基金
