- 作者: 黃文宏 ; 卓靜哲
- 作者服務機構: 成功大學化學系
- 中文摘要:
The first-order kinetics of the decomposition of ferrocenium ion (Fc/sup +/) and its substitution derivatives have been studied in aqueous sulfuric acid and in the presence of excess Ce(IV) ion. The observed first-order rate constant (k/sub obs/) is expressed as k/sub obs/=k/sub d/ for the acyl-substituted ferrocenium ions and k/sub obs/=k/sub d/+k/sub ox/(Ce(IV))/sub 0/ for the unsubstituted and alkyl-substituted ferrocenium ions. Electron-donating alkyl substituents stabilize the ferrocenium ion whereas electron-withdrawing acyl substituents make it less stable. The order of relative stability toward decomposition is 1,1'-dimethyl Fc/sup +/.gtoreq.butyl Fc/sup +/>1,1-dimethylpropyl Fc/sup +/>Fc/sup +/
formyl Fc/sup +/>acetyl Fc/sup +/
benzoyl Fc/sup +/. A mechanism to interpret the kinetics is also given. - 英文摘要: --
- 中文關鍵字: Cerium(Iv); Ferrocenium; 1,1'-Dimethylferrocenium; Butylferrocenium; 1,1-Dimethylpropylferrocenium; Formylferrocenium; Acetylferrocenium; Benzoylferrocenium Ion; Kinetics; Decomposition
- 英文關鍵字: 鈰離子;二茂鐵離子;衍生物;動力學;分解