کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1335550 1500276 2013 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis, X-ray crystallography and electrochemistry of three novel copper complexes with imidazole-containing hydantoin and thiohydantoins
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Synthesis, X-ray crystallography and electrochemistry of three novel copper complexes with imidazole-containing hydantoin and thiohydantoins
چکیده انگلیسی

The reactions of imidazolemethylene-substituted thiohydantoins with copper(II) chloride yield three kinds of complexes with different copper coordination mode. Binuclear complexes Cu2(L1-H)2Cl2 (5), Cu2(L2-H)2Cl (6) and polymeric complex [Cu(L2-H)Cl(H2O)]n (7) (L1 = (4Z)-2-thioxo-4-[(1-methyl-1H-imidazol-2-yl)methylene]-1-allylimidazol-5(4H)-one, L2 = (4Z)-2-thioxo-4-[(1-methyl-1H-imidazol-2-yl)methylene]-1-(n-propyl)imidazol-5(4H)-one) were synthesized and characterized by X-ray diffraction, IR and UV–Vis spectroscopy, and cyclic voltammetry. The crystal structures of homovalent dicopper(II,II) complex 5, mixed-valence [Cu+1.5, Cu+1.5] complex 6 and polymeric copper(II) complex 7 were refined from X-ray powder and single crystal data. Complexes 5–7 undergo eight-step quasi-reversible electrochemical reduction at +0.42 to −2.23 V to stable intermediates, which do not dissociate into free ligand and metal in the conditions of cyclic voltammetry experiments.

Copper complexes of three different type were obtained using two structurally similar imidazole-containing hydantoin and thiohydantoin ligands. All complexes undergo multi-step quasi-reversible electrochemical reduction at +0.42 to −2.23 V with the formation of stable intermediates.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polyhedron - Volume 63, 31 October 2013, Pages 15–20
نویسندگان
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