کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1338388 979666 2011 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis and spectral characterization of mercury(II) complexes with the bidentate Schiff base ligand N,N′-bis(2,3-dimethoxybenzylidene)-1,2-diaminoethane: The crystal structures of [Hg((23-MeO-ba)2en)I2] and [Hg((23-MeO-ba)2en)Br2]
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Synthesis and spectral characterization of mercury(II) complexes with the bidentate Schiff base ligand N,N′-bis(2,3-dimethoxybenzylidene)-1,2-diaminoethane: The crystal structures of [Hg((23-MeO-ba)2en)I2] and [Hg((23-MeO-ba)2en)Br2]
چکیده انگلیسی

Three mercury(II) complexes, [Hg((23-MeO-ba)2en)X2] (X = I (1), Br (2) and Cl(3)), and the ligand (23-MeO-ba)2en ((23-MeO-ba)2en = N,N′-bis(2,3-dimethoxybenzylidene)-1,2-diaminoethane) have been synthesized and characterized by elemental analyses, FT-IR and 1H NMR spectroscopy. The crystal and molecular structures of 1 and 2 were determined by X-ray crystallography from single-crystal data. The metal-to-ligand ratio was found to be 1:1. The mercury(II) center in 1 and 2 has a distorted tetrahedral geometry with HgN2I2 and HgN2Br2 chromophores, respectively. The Schiff base ligand (23-MeO-ba)2en acts as a chelating ligand, coordinating via the two nitrogen atoms to the mercury(II) center, and it adopts an E,E conformation. The coordination sphere of the mercury(II) center in 1 and 2 is completed by the two I and Br atoms, respectively. In complex 1 an inter-molecular non-classical hydrogen bond of the type C–H⋯O was found, while in complex 2 inter- and intra-molecular non-classical hydrogen bonds of the type C–H⋯X (X = O and Br) were found. The 1H NMR spectra of the complexes exhibit downfield as well as upfield shifts of the free ligand resonances, reflecting changes in the ligand’s geometry during its coordination.

Three mercury(II) complexes, [Hg((23-MeO-ba)2en)X2] (X = I (1), Br (2) and Cl(3)), have been synthesized and characterized. The crystal and molecular structures of 1 and 2 were determined by X-ray crystallography from single-crystal data. The mercury(II) center in 1 and 2 has a distorted tetrahedral geometry with HgN2I2 and HgN2Br2 chromophores, respectively. The Schiff base ligand (23-MeO-ba)2en acts as a chelating ligand, coordinating via the two nitrogen atoms to the mercury(II) center. The coordination sphere of the mercury(II) center in 1 and 2 is completed by the two I and Br atoms, respectively.Figure optionsDownload as PowerPoint slideHighlights
► Schiff base ligands and their complexes have been studied because of their interesting properties.
► They can bind to a metal ion via two nitrogen atoms of imine groups.
► They usually act as chelating N,N ligands with transition metal ions.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polyhedron - Volume 30, Issue 17, 3 November 2011, Pages 2790–2794
نویسندگان
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