Synthesis, characterization and structural analysis of new copper(II) complexes incorporating a pyridoxal-semicarbazone ligand
摘要:
The reaction between 3-hydroxy-5-hydroxymethyl-2-methyl-4-pyridinecarboxaldehyde semicarbazone (pyridoxal-semicarbazone or PLSC) and appropriate chloride, sulfate, nitrate or thiocyanate Cu(II) salts in water/alcohol mixtures resulted in the formation of new copper(II) complexes: [Cu(PLSC)Cl-2] (1), [Cu(PLSC)(H2O)(SO4)](2)center dot 3H(2)O (2), [Cu-2(PLSC)(2)(NCS)(2)](NCS)(2) (3), [Cu(PLSC)(NO3)(2)(CH3OH)] (4) and [Cu(PLSC-2H]NH3 center dot H2O (5). The complexes were characterized by elemental analysis, conductometric measurements and IR spectroscopy, while complexes 1, 2, 3 and 4 were further characterized by single crystal X-ray diffraction. Crown Copyright (C) 2010 Published by Elsevier Ltd. All rights reserved.