ethyl pyrazoles. The acid dissociation constants pK and pK∗ in both the ground and excited states, respectively, were determined and correlated with the Hammett equation. The results of such correlations together with the spectroscopic data indicated that the title compounds exist predominantly in the 1H-bis(arylazo) form in both ground and excited states.
从N-芳基2-氧代-2-氧-2-苯基
乙烷hydr唑基
溴化物和5开始,制备了三个系列的3,7-双(芳基偶氮)-6-甲基-2-苯基-1 H-
咪唑基-[1,2- b ]
吡唑-
氨基-4-芳基偶氮-
3-甲基吡唑。分别测定了基态和激发态的酸解离常数p K和p K ∗,并将其与哈米特方程相关。这种相关性的结果与光谱数据一起表明,标题化合物主要以1 H-双(芳基偶氮)形式以基态和激发态形式存在。