title: Synthesis, structure and biological activities of cobalt(II) and zinc(II) coordination compounds with 2-benzimidazole derivatives.
abstract: In this work we present the synthesis, structural and spectroscopic characterisation of a series of cobalt(II) and zinc(II) coordination compounds with benzimidazole (bz) and its 2-benzimidazole derivatives: 2-aminobenzimidazole (2ab), albendazole (abz) and tris(2-benzimidazolylmethyl)amine (ntb). The compounds were evaluated for their in vitro antimicrobial activity against Staphylococcus aureus, Micrococcus luteus, Salmonella typhi, Pseudomonas aeruginosa, Escherichia coli and Proteus vulgaris. Their cytotoxic activity was also evaluated using human cancer lines, HeLa, HCT-15 and SKLU-1. The halide tetrahedral compounds [Co(bz)2Br2] 3, [Zn(2ab)2Cl2].0.5H2O 11, [Co(abz)Cl2(H2O)].3H2O 14, [Co(abz)Br2(H2O)] 15, [Zn(abz)Cl2(H2O)].3H2O 17 and [Zn(abz)Br2(H2O)].H2O 18 displayed similar minimal inhibition concentration (MIC) values against Micrococcus luteus and Escherichia coli, comparable to those of amoxicillin and chloramphenicol. Additionally, 11 showed a wide range of activity towards Gram(+) and Gram(-) microorganisms. The tetradentate ntb and its trigonal bipyramidal cobalt(II) and zinc(II) compounds were active, regardless of the anion present in the complex. Compound [Co(abz)Cl2(H2O)].3H2O 14 showed promising activity in HeLa cells, while [Co(ntb)Br]Br.H2O 21 inhibited Hela and HCT-15 cell lines.
authors.affiliation: Departamento de Química Inorgánica, Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, Coyoacán, México, DF 04510 México, Mexico.
authors.forename: Horacio
authors.initials: H
authors.lastname: López-Sandoval
authors.forename: Milton E
authors.initials: ME
authors.lastname: Londoño-Lemos
authors.forename: Raúl
authors.initials: R
authors.lastname: Garza-Velasco
authors.forename: Israel
authors.initials: I
authors.lastname: Poblano-Meléndez
authors.forename: Pilar
authors.initials: P
authors.lastname: Granada-Macías
authors.forename: Isabel
authors.initials: I
authors.lastname: Gracia-Mora
authors.forename: Norah
authors.initials: N
authors.lastname: Barba-Behrens
mesh_terms: D000890:Anti-Infective Agents / Q000138:chemical synthesis* / Q000494:pharmacology*; D000970:Antineoplastic Agents / Q000138:chemical synthesis* / Q000494:pharmacology*; D001562:Benzimidazoles / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D045744:Cell Line, Tumor; D003035:Cobalt / Q000737:chemistry* / Q000494:pharmacology*; D018360:Crystallography, X-Ray; D004926:Escherichia coli / Q000187:drug effects; D006367:HeLa Cells; D006801:Humans; D008826:Microbial Sensitivity Tests; D016982:Micrococcus luteus / Q000187:drug effects; D019906:Nuclear Magnetic Resonance, Biomolecular; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D011514:Proteus vulgaris / Q000187:drug effects; D011550:Pseudomonas aeruginosa / Q000187:drug effects; D012485:Salmonella typhi / Q000187:drug effects; D013055:Spectrophotometry, Infrared; D013211:Staphylococcus aureus / Q000187:drug effects; D015032:Zinc / Q000737:chemistry* / Q000494:pharmacology*
chemical_list: D000890:Anti-Infective Agents; D000970:Antineoplastic Agents; D001562:Benzimidazoles; D009942:Organometallic Compounds; D003035:Cobalt; D015032:Zinc