アルキルジニトロフェノラートとハイドロキシル又はアルコキシルイオンの核置換反応中間体の反応機構と構造

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The mechanisms of nucleophilic aromatic substiution reactions of some dinitrobenzene derivatives with hydroxyl and alkoxyl ions were studied by measuring spectrophotometrically the decomposition velocity of intermediate complexes which appeared immediately after mixing the methanol solution that of dinitroanisole with that of KOH and gradually disappeared with time. The decompsition reaction was found to follow the equation of the first order reaction, and the activation energy for this decomposition reaction was evaluated to be 15.3 kcal/mole from the temperature dependence of the reaction velocity. Intermediate complexes for the reactions between some alkyl dinitrophenolate and several alkoxyl ions were obtained as red crystal. By measuring the infrared absorption of intermediate crystal it was found that the strong and broad band characteristic of ketal structure 〓 appeared at ～1150 cm^<-1>. This fact strongly supports that the intermediate complexes take the structure like 〓
茨城大学工学部の論文