Heterobimetallic Fe(II)–Cu(I) Complexes Supported with 1,1′-Bis(diphenylphosphino)ferrocene and Chelating Sulfur Donor Ligands: Structural Characterization, DFT Analysis, Anti-tyrosinase Assay and Biological Studies

•Four novel heterobimetallic Fe(II)-Cu(I) complexes based on dppf and dialkyldithiophosphate ligands were prepared.•Full characterization of the complexes was carried out using multinuclear NMR spectroscopy and single crystal X-ray crystallography studies.•These novel complexes proved to be efficient anticancer agents, degree of which depend on the nature of substituents on dialkyldithiophosphate ligands.•To calculate electronic structures, a density functional theory analysis of the Fe(II)-Cu(I) complexes were carried out.