Synthesis, crystal structures, and antimicrobial activities of copper(II) complexes with bis-Schiff bases
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Three newly synthesized copper(II) complexes with the general formula [CuL], where L is the dianionic form of <i>N,N′</i>-bis(3,5-difluorosalicylidene)ethane-1,2-diamine (H<sub>2</sub>L<sup>1</sup>) for <b>1</b>, <i>N,N′</i>-bis(3,5-difluorosalicylidene)propane-1,3-diamine (H<sub>2</sub>L<sup>2</sup>) for <b>2</b>, and <i>N,N′</i>-bis(3,5-difluorosalicylidene)-2-hydroxy-1,3-propanediamine (H<sub>2</sub>L<sup>3</sup>) for <b>3</b>, have been obtained and structurally characterized by spectroscopic method and single-crystal X-ray determination. The Cu atoms in the complexes are in square planar coordination, with the two imino N and two phenolate O atoms of the Schiff base ligands. The <i>in vitro</i> antimicrobial activities of the compounds indicate that they are interesting antibacterial agents.
