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Reazioni di sostituzione elettrofila su 3-fenil-1,2,5-selena—, —tia—, e —ossadiazolo

Angela De MunnoVincenzo BertiniPiero RaseroNevio PicciLoretta Bonfanti — 1978

Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti

3-phenyl-1,2,5-selenadiazole (I), 3-phenyl-1,2,5-thiadiazole (II), and 3-phenyl-1,2,5-oxadiazole (III) undergo bromination at the para position of the phenyl ring. Compound I undergoes mononitration and also dinitration at the position para and ortho of the phenyl ring in analogy to II and III. Towards either bromination or nitration the more reactive of the examined substrates is compound II which is known to have interatomic ring distances in agreement with a higher delocalization of π -electrons....

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