Synthesis,characterization and crystal structures of Ni(II), Cd(II) complexes with N -(2-propionic acid)-salicyloyl hydrazone and bipy/phen |
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Abstract: | The ligand N-(2-propionic acid)-salicyloyl hydrazone(H3L, 1) and its new transition metal(II) complexes [NiHL(bipy)H2O] (2), [CdHL(bipy)(H2O)2]2·2H2O (3) and [NiHL(phen)H2O]·H2O (4) (HL is a dianion, bipy?=?2,2′-bipyridine and phen?=?1,10-phenanthroline) were synthesized and characterized on the basis of elemental analyses, IR, 1H NMR, molar conductivity and thermal analysis. Single crystal X-ray diffraction showed that 1 is in keto form and connected by hydrogen bonds to form a two-dimensional supermolecular compound. Complexes 2 and 4 have the same structure with distorted meridional octahedral geometry with 1 as a tridentate ligand with keto-form coordination by azomethine, carboxyl O and acyl O. In 3, ligand 1 bridges two Cd(II) atoms by μ 2-O of carboxyl. H-bonding is an important weak interaction for constructing supermolecular frameworks. There are π–π interactions between bipy or phen rings in 3 or 4, respectively. |
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Keywords: | N-(2-propionic acid)-salicyloyl hydrazone Transition metal complexes Bipy Phen Crystal structure H-bonding π–π interaction |
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