Syntheses and X-ray structural studies of the novel complexes [Ni(en)2(3-pyt)2] and [Cu(en)2](3-pyt)2 based on 5-(3-pyridyl)-1,3,4-oxadiazole-2-thione |
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| Authors: | Mamata Singh R.J. Butcher N.K. Singh |
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| Affiliation: | aDepartment of Chemistry, Banaras Hindu University, Varanasi 221 005, India;bDepartment of Chemistry, Howard University, 525 College Street NW, Washington, DC 20059, USA |
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| Abstract: | Two novel mononuclear mixed-ligand complexes [Ni(en)2(3-pyt)2] (1) and [Cu(en)2](3-pyt)2 (2), derived from potassium [N′-(pyridine-3-carbonyl)-hydrazinecarbodithioate [K+(H2L)−] and containing en as a co-ligand, have been synthesized. The [K+(H2L)−] undergoes cyclization in the presence of ethylenediamine (en) and is converted to 5-(3-pyridyl)-1,3,4-oxadiazole-2-thione (3-pyt)−. [Ni(en)2(3-pyt)2] and [Cu(en)2](3-pyt)2 have been characterized with the aid of elemental analyses, IR, UV–Vis, magnetic susceptibility and single crystal X-ray studies. The complexes 1 and 2 crystallize in the orthorhombic and monoclinic systems with space groups Pca2(1) and C2/c, respectively. The single crystal X-ray diffraction studies of both complexes indicate that (3-pyt)− adopts a thione form in 1 but is present as a thiolato form in 2. |
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| Keywords: | 5-(3-Pyridyl)-1,3,4-oxadiazole-2-thione Mixed-ligand complexes Ethylenediamine complexes Supramolecular architecture X-ray |
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