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The synthesis, structural characterization, cytotoxicity, and antimicrobial properties of four new complexes formed by employing acrylate anion and 2,2'-bipyridine are reported herein. X-ray crystallography revealed the trinuclear nature of [Mn₃(2,2'-bipy)₂(C₃H₃O₂)₆] ( 1 ), meanwhile complexes with general formula [M(2,2'-bipy)(C₃H₃O₂)₂(H₂O)  x  ]∙ y H₂O (( 2 ) M: Ni, x = 1, y = 0; ( 3 ) M: Cu, x = 1, y = 0; ( 4 ) M: Zn, x = 0, y = 1; 2,2'-bipy: 2,2'-bipyridine; C₃H₃O₂: acrylate anion) were shown to be mononuclear. The lowest minimum inhibitory concentration (MIC) of 128 μg mL -1 was recorded for all four tested complexes against Candida albicans , for complex ( 3 ) against Escherichia coli , and for complex ( 4 ) against Staphylocococcus aureus . Compounds ( 3 ) and ( 4 ) were also potent efflux pumps activity inhibitors (EPI), proving their potential for use in synergistic combinations with antibiotics. Complexes ( 1 )-( 4 ) revealed that they were not cytotoxic to HCT-8 cells. They also proved to interfere with the cellular cycle of tumour HCT-8 cells by increasing the number of cells found in the S and G2/M phases. Taken together, these results demonstrate the potential of zinc and copper complexes for use in the development of novel antimicrobial and anti-proliferative agents.

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Synthesis, Structural Characterization, Antimicrobial Activity, and In Vitro Biocompatibility of New Unsaturated Carboxylate Complexes with 2,2′-Bipyridine