Syntheses,Crystal Structures,and Magnetic Properties of Carboxylate-Bridged Copper(II) Complexes with Bis(2-Pyridylmethyl)Amino Acids |
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Authors: | Email author" target="_blank">Ki-Young?ChoiEmail author Sun-Young?Park Yong-Man?Jeon Haiil?Ryu |
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Institution: | (1) Department of Chemistry Education, Kongju National University, Kongju, 314-701, Korea |
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Abstract: | Tetradentate Schiff-base carboxylate-containing ligands, bis(2-pyridylmethyl)amino-5-valeric acid (Hpmva) and bis(2-pyridylmethyl)amino-6-caproic
acid (Hpmca), react with copper(II) perchlorate to give rise to the carboxylated bridged chain complexes {Cu(μ-pmva)(H2O)](ClO4)}n (1) and {Cu(μ-pmca)(H2O)](ClO4)}n (2). These complexes have been characterized by X-ray crystallography, spectroscopic, and variable-temperature magnetic susceptibility
measurements. In 1 and 2, each of the copper(II) ions exhibit CuN3O2 coordination environments with the three nitrogen atoms of the ligand and one oxygen atom belonging to the carboxylate group
of an adjacent molecule occupying the basal position and a water molecule coordinated in the axial position. The electronic
spectra of the complexes are significantly affected by the coordination geometry. Magnetic susceptibility measurements indicate
that complexes exhibit very weak ferromagnetic interactions. |
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Keywords: | Self-assembly bis(2-pyridylmethyl)amino acids copper(II) complexes crystal structures ferromagnetism |
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