Solution studies of tris(2-benzylaminoethyl)amine complexes of zinc(II) and copper(II): The catalytic hydrolysis of toxic organophosphate

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• 作者：Gaber A.M. Mersal^a ; ^c ; ^{gamersal@yahoo.com} ; Mohamed M. Ibrahim^b ; ^c
• 关键词：Zinc(II) ; Copper(II) ; Tris(2-benzylaminoethyl)amine ; 1H NMR and UV-visible titrations ; Kinetic ; Phosphate hydrolysis
• 刊名：Comptes Rendus Chimie
• 出版年：2012
• 期刊代码：119_16310748
• 类别：ch
• 出版时间：April, 2012
• 卷：15
• 期：4
• 页码：336-345
• 文件大小：1249 K

摘要

Solution studies of the tetradentate ligand tris(2-benzylaminoethyl)amine, BzTren with both zinc(II) and copper(II) salts were investigated in aqueous methanol (33%v/v) by means of ¹H NMR, potentiometric, and UV-visible titrations as well as cyclic voltammetry. Subsequently, their zinc(II) and copper(II) complexes [BzTren-M(OH₂)]²⁺ 1 and 2 (M²⁺ = Zn²⁺ and Cu²⁺) were synthesized and fully characterized by using FT-IR spectroscopy, elemental analysis, and thermal analysis. Complexes 1 and 2 are investigated kinetically for the catalytic hydrolysis of the toxic organophosphate parathion at 50 掳C in aqueous methanol (33%, v/v). The kinetic results indicate that copper(II) complex 2 is more active than zinc(II) complex 1, presumably a reflection of the effective electron-withdrawing as well as the greatest electrophilicity of copper(II) ion.