(40–52%). The X-ray analysis of the ruby-red 8 reveals a half-chair conformation with a torsion angle of 58.9° at the disulfide bond. The thermal desulfurization 8 9 (benzonitrile, 100°C) proceeds with t1/2 = 26.7 h, whereas the sulfur loss induced by triethyl phosphite is a billion times faster. The mechanisms of the formation of 8 and its sulfur extrusion are discussed in the light or recent literature.
四苯甲基
氨基
乙烯与两个分子的苯并
二苯甲酮在回流的苯中结合,除相应的
噻吩衍
生物9(40-52%)外,还产生了四取代的1,2-二
硫辛8(21-29 %)。宝石红8的X射线分析表明,半椅子构型在二
硫键处的扭转角为58.9°。热脱
硫8 9(
苄腈,100°C)以t 1/2 = 26.7 h进行,而
亚磷酸三乙酯引起的
硫损失快十亿倍。轻的或最近的文献中讨论了8的形成及其
硫磺挤出的机理。