Various monocyclic 1, 2-dithiines 6a, b, dt were prepared via (Z, Z)-1, 4-difunctionalized butadienes (4–11, 19, 20). A twisted cyclic structure A is unequivocally proved rather than of the ringopened valence isomer B. The reactivity of these 1, 2-dithiines is described. Thermal as well as day-light induced sulfur extrusion is an important feature of their chemistry. The latter mode of sulfur extrusion depends to a significant extent on absorption in the visible ...
![1-methoxy-4-[4-(4-methoxyphenyl)buta-1,3-diynyl]benzene结构式](https://image.chemsrc.com/caspic/121/22779-05-1.png)
![(Z,Z)-1,4-di(o-nitrophenyldithio)-1,4-di[p-tolyl]-1,3-butadiene结构式](https://image.chemsrc.com/caspic/471/183211-05-4.png)
![1-methyl-4-[4-(4-methylphenyl)buta-1,3-diynyl]benzene结构式](https://image.chemsrc.com/caspic/374/22666-07-5.png)
![(Z,Z)-1,4-di(2-nitrophenyldithio)-1,4-di[p-methoxyphenyl]-1,3-butadiene结构式](https://image.chemsrc.com/caspic/395/183211-07-6.png)
