烷基桥联双二茂铁衍生物的取代基效应与电化学性质的研究

对烷基桥联双二茂铁衍生物的电化学特性进行了研究.结果表明,分子稳定构象对该类分子体系的茂铁基电化学行为具有决定性影响,即两个二茂铁与桥头碳的夹角越小,其分子中2个茂铁基之间相互作用越大,ΔE_p值越大.此外,讨论了酰基对茂铁中心的电氧化作用的影响,酰基表现出较强的吸电子诱导效应.

The Relationship Between the Bridging Alkyl Group and Electrochemical Behavior of Some Biferrocenyl Alkanes

The cyclic voltammetric behavior of some alkyl-bridged biferrocene compounds are reported. It was found that the stable conformation is the decisive factor influencing their electrochemical properties. The larger the angle between the two ferrocenyl groups and the bridge carbon deviates from 109°28', the greater the Δ E_pvalue bocomes. Besides, the electrochemical behavior of some 6-acyl, 6,6'-diacyl alkyl bridged biferrocene derivatives are investigated and the factors affecting their electrochemical behavior are also discussed. Acyl group exerts an electron withdrawing effect on the ferrocenyl moieties, which makes them more difficult to be oxidized than their parent compound.