کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1338315 | 979663 | 2007 | 9 صفحه PDF | دانلود رایگان |
Equilibrium studies of the mixed-ligand complexes of the copper(II) ion with pentamethyldiethylenetriamine (N,N,N′,N″,N″-pentamethyl-[bis(2-aminoethyl)amine], Me5dien) as a primary ligand and methioninehydroxamic acid (2-amino-4-(methylthio)butanehydroxamic acid, Metha) or histidinehydroxamic acid (2-amino-3-(4′-imidazolyl)propanehydroxamicacid, Hisha) as a secondary ligand L were performed by potentiometric titration, UV–Vis and EPR spectroscopy. The results show that in these ternary systems the dinuclear [Cu2(Me5dien)L2H−1]+ mixed-ligand species is formed as a predominant one in the basic solution. The monouclear [Cu(Me5dien)L]+ species is formed in low concentration. Our spectroscopic results indicate that the geometry of these mixed-ligand five-coordinate complexes is strongly distorted towards trigonal-bipyramidal.
Equilibrium studies of the mixed-ligand complexes of the copper(II) ion with the tridentate amine as a primary ligand and methionine- or histidinehydroxamic acid as a secondary ligand. In these ternary systems the dinuclear [Cu2(Me5dien)L2H−1]+ species is formed as a predominant one in the basic solution. The monomeric [Cu(Me5dien)L]+ species is formed in low concentration. The geometry of mixed-ligand five-coordinate complexes is strongly distorted towards trigonal-bipyramidal.Figure optionsDownload as PowerPoint slide
Journal: Polyhedron - Volume 26, Issue 15, 20 September 2007, Pages 4345–4353