Syntheses, structures and properties of copper(II) complexes containing N-(2-hydroxybenzyl)-amino amide ligands |
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| Authors: | Xiaobai Wang Jagadese J. Vittal |
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| Affiliation: | a Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117 543, Singapore
b Department of Materials Science and Engineering, National University of Singapore, Singapore 117543, Singapore |
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| Abstract: | Four copper(II) complexes containing the reduced Schiff base ligands, namely, N-(2-hydroxybenzyl)-glycinamide (Hsglym) and N-(2-hydroxybenzyl)-l-alaninamide (Hsalam) have been synthesized and characterized. The crystal structures of [Cu2(sglym)2Cl2] (1), [Cu2(salam)2(NO3)2] · H2O (3), [Cu2(salam)2(NO3)(H2O)](NO3) · 1.5H2O (4), [Cu2(salam)2](ClO4)2 · 2H2O (5) show that the Cu(II) atoms are bridged by two phenolato oxygen atoms in the dimers. The sglym ligand bonded to Cu(II) in facial manner while salam ligand prefers to bind to Cu(II) in meridonal geometry. Variable temperature magnetic studies of 3 showed it is antiferromagnetic. These Cu(II) complexes and [Cu2(sglym)2(NO3)2] (2), exhibit very small catecholase activity as compared to the corresponding complexes containing acid functional groups. |
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| Keywords: | Copper(II) complexes Reduced Schiff base ligands Crystal structures Magnetic properties Catalytic activity |
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