phenolic nucleus and a hydrazone group, and the D bands, in a conjugative electronic transition between a carboxylic acid anilide group and a hydrazone group. From the investigation of the series of spectra in phenolazoacetoacetbenzylamides, the B bands have been assigned to the conjugation band; they arise from a conjugative electronic transition within a partial chromophore consisting of an acetyl carbonyl
酚偶氮乙酰乙酰胺呈腙形式。
酚羟基在固态和非极性溶剂中与腙氮原子形成分子内氢键。这些化合物的电子吸收光谱表现出四组特征谱带: A 谱带产生于涉及电子沿相应化合物整个共轭体系迁移的跃迁;C 带起源于
酚核和腙基团之间的共轭电子跃迁,D 带起源于
羧酸酰
苯胺基团和腙基团之间的共轭电子跃迁。从对
苯酚偶氮乙酰乙酰苄基酰胺的系列光谱的研究来看,B 带已被指定为共轭带;