کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1302879 | 974718 | 2010 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Linkage isomerism for 4-methylimidazole and a new coordination mode of pyrazine-2,3-dicarboxylate ligand in {[Cd(pzdc)(4-mim)(5-mim)2]·½H2O}n coordination polymer Linkage isomerism for 4-methylimidazole and a new coordination mode of pyrazine-2,3-dicarboxylate ligand in {[Cd(pzdc)(4-mim)(5-mim)2]·½H2O}n coordination polymer](/preview/png/1302879.png)
A novel one dimensional coordination polymer of Cd(II)-pyrazine-2,3-dicarboxylate with a new coordination mode of pyrazine-2,3-dicarboxylate ligand (pzdc), {[Cd(pzdc)(4-mim)(5-mim)2]·½H2O}n (1) (4(5)-methylimidazole = 4(5)-mim), has been synthesized and characterized by elemental, thermal analysis, IR spectrum and single crystal X-ray diffraction technique. In complex 1, the Cd(II) ion has a distorted octahedral geometry, in which the pzdc moiety acts as a bridging ligand. Linkage isomerism of the coordinated 4(5)-methylimidazole ligand was observed in 1. The two adjacent one-dimensional chains connected by interchain hydrogen bonds among the N-H groups of methylimidazoles and carboxylate oxygens of pzdc, leading to a three-dimensional framework. The hydrogen bonds account for the coexistence of two unique coordination forms of methylimidazoles in the same coordination sphere.
A novel one dimensional coordination polymer of Cd(II)-pyrazine-2,3-dicarboxylate with a new coordination mode of pyrazine-2,3-dicarboxylate ligand (pzdc), {[Cd(pzdc)(4-mim)(5-mim)2]·½H2O}n (1) (4(5)-methylimidazole = 4(5)-mim), has been synthesized and characterized. The Cd(II) ion exhibits a distorted octahedral geometry and is coordinated by two oxygen and one nitrogen atoms from two pzdc and three nitrogen atom from three 4(5)-mim ligands. In 1, pzdc ligand exhibits a new coordination mode and linkage isomerism of the coordinated 4(5)-methylimidazole ligand was observed.Figure optionsDownload as PowerPoint slide
Journal: Inorganic Chemistry Communications - Volume 13, Issue 10, October 2010, Pages 1173–1177