环状亚砜衍生物的合成及萃金机理的研究

A Study on the Synthesis of Cyclic Sulfoxides Derivatives and Mechanism for Extracting Au(Ⅲ)

讨论了环状亚砜衍生物DTMSO、OTMSO、BTMSO的合成及其萃金性能及机理 ,DTMSO和OTMSO在盐酸溶液中 ,低酸度下以中性络合溶剂化机理萃金 ,萃合物组成为(HAuCl4)·3DTMSO和 (HAuCl4)·3OTMSO ,亚砜通过氧与金配位 ;高酸度下 ,以酸性缔合机理萃金 ,萃合物组成为 (H·3DTMSO) +AuCl-4 和 (H·3OTMSO) +AuCl-4 ,发生内配位转变。BTMSO在盐酸溶液中以中性络合溶剂化机理萃金 ,萃合物组成为 (HAuCl4)·2BTMSO。萃金能力BTMSO <OTMSO

Novel cyclic sulfoxides derivatives:α-dodecyl,α-octyl,α-butyl-thiolane-1-oxides were prepared by the alkylation of thiolane-1-oxide.The behaviour and mechanism of extracting Gold(Ⅲ) with DTMSO,OTMSO were investigated.The results indicated that the reactions are neutral solvent complexing extraction in〔HCl〕≤2 mol/L,in which the composition of extracted complexes are (HAuCl 4)·3DTMSO,(HAuCl 4)·3OTMSO and Au is coordinated with O atom in>S=O group;the reaction is acid association extraction in〔HCl〕≥2 mol/L.The mechanism of extracting Gold(Ⅲ) with BTMSO was also investigated.The results indicated that the reactions are neutral solvent complexing extraction,the composition of extracted complex is (HAuCl 4)·2BTMSO,Au are coordinated with O and S atom in >S=O group.the abilities of extracting Gold(Ⅲ) with cyclic sulfoxides derivatives are BTMSO<OTMSO<DTMSO.