O,O-Dialkyl-S-aryl-phosphorothioates are thermally unstable and decompose readily at a temperature of about 150° with formation of alkyl aryl sulfides and polymeric alkyl meta- or -polyphosphates. Differences in reactivity within a series of 33 phosphorothioates are rationalized on the basis of steric and electromeric effects. The mechanism of the thermal degradation is discussed, the influence of
O,O-二烷基-S-芳基-
硫代磷酸酯是热不稳定的,并且在约150°的温度下容易分解,形成烷基芳基
硫化物和聚合的烷基间-或-聚
磷酸盐。在一系列33种
硫代磷酸酯中,反应性的差异是根据空间效应和电子效应来合理化的。讨论了热降解的机理,研究了
硫醚和
苯酚对热分解速率的影响。