Synthesis of adducts from mercury(II) with N and S donor ligands as models of adsorbent materials for the retention of heavy metals: X-ray crystal structure of bis(3,5-dimethylpyrazol-1-yl)methane(dichloro)mercury(II)

Abstract

A series of adducts of the type (LL′)HgCl 2 have been obtained by the reaction of the corresponding ligand and the mercury salt. (LL′)=bis(3,5-dimethylpyrazol-1-yl)methane ( 3), 2-(methylthio)pyrazine ( 4), 2-(methylthio)benzothiazole ( 5) and four new trialkoxysilane ligands ( 1a and 1b) and ( 2a and 2b) with attached 2-mercaptopyridine and 2-mercaptobenzothiazole units. The mercury adducts ( 6– 10), which are models of modified heavy metal adsorbing silicas, have been characterized by analytical and spectroscopic data. [(3,5-Dimethylpyrazol-1-yl)methane]HgCl 2 ( 8) has been characterized by X-ray diffraction.