“桥式”双四硫富瓦烯衍生物的合成及电化学行为

Synthesis and Electrochemical Behaviour of Bridged Bis-tetrathiafulvalenes

2,3 -二 (2 -氰乙硫基 ) -6,7-(1 ,3 -亚丙基 -二硫基 )四硫富瓦烯 (5 )在甲醇钠的作用下分 2次消去氰乙基基团。第 1次消去后化合物中的硫醇钠 (6)与对氯二甲苯反应生成一种新的“一桥”-双四硫富瓦烯衍生物(7) ,该衍生物再依次与甲醇钠和对氯二甲苯反应生成一种新的“二桥”-双四硫富瓦烯衍生物 (8) ,为四硫富瓦烯衍生物的合成提出了一种新的方法。研究结果表明 ,2种“桥式”-双四硫富瓦烯衍生物的循环伏安图有 2个双电子氧化 -还原电位 。

A novel method for synthesis of briged bis tetrathiafulvalenes has ben proposed. 2,3 Bis(2 cyanoethylthio) 6,7 (1,3 propylidenedithio)tetrathiafulvalene(5) was reacted with sodium methoxide to give monothiolate of tetrathiafulvalene(6), which on reacting with p chloroxylene afforded a monobridged bis tetrathiafulvalene(7). Deprotection and alkylation of (7) yielded two bridged bis tetrathiafulvalene(8). In cyclic voltammograms of both compound(7) and (8) there were two oxidation reduction peaks. Their UV Vis spectral absorbances were also found intensified.