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Syntheses, crystal structure, thermal behavior, and anti-tumor activity of three ternary metal complexes with 2-chloro-5-nitrobenzoic acid and heterocyclic compounds
Abstract
Three complexes, namely complex (
1
), complex (
2
), and complex (
3
), were synthesized and characterized by X-ray diffraction, thermogravimetric study, and elemental study. Complex (
1
) comprises discrete binuclear clusters, where two oxygen atoms of 2-chloro-5-nitrobenzoic acid bridge the two copper atoms. Complex (
2
) is a six-coordination structure consisting of four nitrogen atoms and two oxygen atoms in 2-chloro-5-nitrobenzoic acid and 1,10-phenanthroline to furnish a twisted octahedron. Complex (
3
) is a six-coordination structure consisting of four oxygen atoms and two nitrogen atoms from the 2-chloro-5-nitrobenzoic acid, methanol, and 2,2′-dipyridyl to furnish a distorted octahedral geometry. Metal complexes’ anti-tumor activity was also investigated by the MTT assay. Of the complexes tested, complex (
1
) could induce apoptosis in these A549 lung cancer and Caco-2 colon adenocarcinoma cells and complex (
2
) could induce apoptosis in Caco-2 colon adenocarcinoma cells. CCDC for complex (
1
) was 1543354, CCDC for complex (
2
) was 1546991, and CCDC for complex (
3
) was 1543417.