- 作者: H. M. Fahmy; M. H. Elnagdi; A. Elsaid Mahgoub; A. Kasem; E. A. Ghali
- 作者服務機構: Chemistry Department , Faculty of Science, Cairo University, Giza, A.R.E.
- 中文摘要: The structure and tautomerism of 5-amino-4-arylazopyrazoles (2a-f) are investigated in aqueous media. In solutions of pH<5 these exist as ring N-1 protonated species. At pH>10 they afford anions which are stabilized by delocalization of the negative charge in the ring as well as on the arylazo moiety. Controlled potential electrolysis and polarographic analysis indicate that 2a-f are reduced via a four electron reduction process to triaminopyrazole and the corresponding substituted aniline derivative. A mechanism is suggested and discussed.
- 英文摘要: --
- 中文關鍵字: Azo-hydrazono conflict.
- 英文關鍵字: Azo-hydrazono conflict.