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本文报导用Aronoff法测定的十五种卟啉的质子化常数(K_3和K_4),并讨论了中位取代基(硝基、氯和甲氧基)对常数的影响。
The protonation constants (K_3 and K_4) of fifteen porphyrins measured by the Aronoff method are reported in this paper. The effects of the central substituents (nitro, chloro and methoxy) on the constants are also discussed.