complex-formation with sodium ion. The photolysis of these oximes gave mother ketones and amides through an oxaziridine intermediate. The photolysis of the oximes was depressed by the formation of host-guest complexes. Reactivity in the photolysis of the crown ether oximes corresponds to that of 3,4-dimethoxyacetophenone oxime, whereas the reactivity of the complexed crown ether oxime with sodium ion corresponds
乙酰苯并
冠醚肟的顺反异构化受到
钠离子络合物形成的刺激。这些
肟的光解通过恶
氮丙啶中间体产生母酮和酰胺。主客体复合物的形成抑制了
肟的光解。
冠醚肟的光解反应性对应于
3,4-二甲氧基苯乙酮肟,而络合的
冠醚肟与
钠离子的反应性对应于
对氰基苯乙酮肟的反应性。这种行为可以通过
苯乙酮肟发色团激发态的电子性质的变化来解释,这增强了系统间的交叉。