Reduction of 1,1′-ethylenebis(pyridinium) dibromide with sodium amalgam afforded the cyclomers of 1,1′-ethylenebis(pyridinyl) diradical. Meso and dl forms of the cyclomers are convertible to each other. Photolysis of the cyclomers showed a triplet ESR spectrum characteristic of the diradical.
用
钠汞齐还原 1,1'-亚乙基双(
吡啶鎓)二
溴化物得到 1,1'-亚乙基双(
吡啶基)双自由基的环聚体。环化器的内消旋和 dl 形式可以相互转化。环聚体的光解显示出双自由基的三重 ESR 光谱特征。