3-Diethylamino-6-phenyl-1,4,2,5-dithiadiazine, on standing in air at room temperature, decomposed to afford 5-diethylamino-3-phenyl- and 3,5-bis(diethylamino)-1,2,4-thiadiazoles, whereas in the melt and in solution it was remarkably stable. With increasing bulkiness of substituents (Ar and/or NR2) in 1,4,2,5-dithiadiazines, their stability in the solid state clearly enhanced. Some interstack interactions in the crystal seem to favor the decomposition.
3-二乙
氨基-6-苯基-1,4,2,5-二噻二嗪在室温下置于空气中会分解生成 5-二乙
氨基-3-苯基和 3,5-双(
二乙基氨基)-
1,2,4-噻二唑,而在熔体和溶液中则非常稳定。随着 1,4,2,5-二
噻二唑中取代基(Ar 和/或 NR2)体积的增加,它们在固态中的稳定性明显增强。晶体中的一些堆间相互作用似乎有利于其分解。