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A lariat crown ether ligand 7,16-bis (2-hydroxy-5-methylbenzyl)-1,4,10,13-tetraoxa-7,16-diazacyclooctadecane (L1) has been prepared via one-pot Mannich reaction. Its copper(II) complex Cu-L1 was synthesized and charac-terized by elemental analysis, IR and UV-visible spectroscopy. The crystal structure of the complex has been deter-mined by X-ray diffraction analysis. The result shows that the copper(II) ion is six-coordinated by two nitrogen and four oxygen atoms, two from the crown ether and the other two from the deprotonated phenolate anions, forming an elongated octahedral complex. Electrochemical study indicates that the complex undergoes reversible reduction in DMF solution.
A lariat crown ether ligand 7,16-bis (2-hydroxy-5-methylbenzyl) -1,4,10,13-tetraoxa-7,16- diazacyclooctadecane (L1) has been prepared via one-pot Mannich reaction. (II) complex Cu-L1 was synthesized and charac-terized by elemental analysis, IR and UV-visible spectroscopy. The crystal structure of the complex has been deter mined by X-ray diffraction analysis. The result shows that the copper (II ) ion is six-coordinated by two nitrogen and four oxygen atoms, two from the crown ether and the other two from the deprotonated phenolate anions, forming an elongated octahedral complex. Electrochemical study indicates that the complex undergoes reversible reduction in DMF solution.