Duba zuwa sashi na ƙasa sannan ka amsa tambayar daga baya a cikin wannan harshe kamar yadda sashi: Passage: Bayan dumama amine na farko tare da N-2,4-dinitrophenyl-pyridinium gishiri (2), ƙari na amine yana haifar da buɗe zoben pyridinium. Ƙarin amine na biyu yana haifar da maye gurbin 2,4-dinitroaniline (5) da kuma samar da gishirin König (6a da 6b). Trans-cis-trans isomer na König gishiri (6a) na iya amsawa ta hanyar sake tsara sigmatropic ko nucleophilic ƙari na zwitterionic tsaka-tsaki don ba da tsaka-tsaki na cyclized (7). An ba da shawarar cewa wannan shine matakin ƙayyade saurin. Bayan canja wurin proton da kawar da amine, ion pyridinium da ake so shine (9) Tambaya: Menene ya faru lokacin da kuka ƙara amine na farko?
buɗewar zoben pyridinium