Abstract
Two new Schiff base ligands of HLBr and HLCl with the general formula C4H4—OHC6H3C=NCH2CH2X (X = Br, Cl) and their Mn(II) and Cu(II) complexes (1, 2, 3, and 4) are synthesized. Different characterization methods, such as the elemental analysis (CHN), 1H NMR and FTIR spectroscopy, and the single crystal X-ray diffraction analysis are used to determine the composition, functional groups and crystal structures of the investigated compounds. The titled Schiff base ligands crystallize in the monoclinic system with the space group P21/c. The crystal packing of Schiff bases is stabilized by N—H⋯O and C—H⋯O hydrogen bonds. The Schiff bases are coordinated to Mn(II) and Cu(II) ion centers via two different donor atoms (nitrogen and oxygen) and form bis-chelate complexes M(LX)2 (1—4) in an approximately square planar coordination geometry. Complexes 1, 2, and 4 crystallize in the monoclinic system with the space group P21/c.
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