Syntheses, Crystal Structures, and Antimicrobial Activities of Copper(II) Complexes Derived from N,N'-Bis(5-Fluorosalicylidene)-1,3-Propanediamine

Abstract: Two new Schiff base copper(II) complexes, [Cu₂L₂] (I) and [Cu₂L(NCNCN)₂]_n (II), where L is the dianionic form of N,N'-bis(5-fluorosalicylidene)-1,3-propanediamine (H₂L), were synthesized and characterized by elemental analyses, infrared and electronic spectroscopy, and single crystal X-ray determinations (CIF files CCDC. nos. 2000415 (I) and 2000416 (II)). Complex I is a phenolate bridged dinuclear copper(II) compound. Complex II is a phenolate and dicyanoamide bridged polynuclear copper(II) compound. In both complexes, the Cu atoms are in square pyramidal coordination. The Schiff base ligand coordinates to the Cu atoms through the phenolate O and imino N atoms. The Schiff base H₂L and the two complexes showed high selectivity and antimicrobial activities against a number of the bacteria and fungi.