Associative substitution mechanisms of clusters: the relationship between sites of nucleophilic attack and leaving group dissociation
作者:Richard A. Henderson
DOI:10.1039/c39950001905
日期:——
The associative substitution mechanism of [Fe4S4Cl4]2– with 4-RC6H4S– involves initial, rapid binding of the thiolate to an iron atom (Fea), followed by rate-limiting dissociation of a chloro-ligand; however, the origin of the leaving group changes with the electron-releasing capability of the thiolate and when R = Cl, F, H or Me, the chloro-group at Fea is labilised, whereas when R = Me, MeO or NH2
[Fe 4 S 4 Cl 4 ] 2 –与4-RC 6 H 4 S –的缔合取代机理涉及硫醇盐与铁原子(Fe a)的初始快速结合,然后限制氯的速率解离-配体;然而,离去基团的起源随硫醇盐的电子释放能力而变化,当R = Cl,F,H或Me时,Fe a处的氯基呈迷彩状,而当R = Me,MeO或NH 2时偏远铁矿位处的氯基(Fe r)被标记。