Copper(ii) complexes based on 5-methyl-1H-tetrazole and 2,2′-bipyridine, 1,10-phenathroline derivatives: synthesis, crystal structures and extended cytotoxicity study

Three cytotoxic copper( ii ) complexes – [Cu 2 (bipy) 2 L 4 ] (1), [Cu 2 (phen) 2 L 4 ] (2) and [Cu 2 (dmphen) 2 L 4 ]·2H 2 O (3) – were synthesized based on 5-methyltetrazole (HL) and 2,2′-bipyridine/1,10-phenanthroline derivatives.