Organotin(IV) complexes recently have been receiving great attention due to their stability with a unique structure, physical and chemical properties. There are many applications, the organotin(IV) can be used as catalysts, antifouling agents, UV-and heat stabilizers, anticorrosion, anticancer and antimicrobial activities. This review summarizes the synthesis methods, characterization and biological activities of organotin(IV) thiosemicarbazones derivatives with their activities as anticancer and antimicrobial agents.

The snthesis and characterization of cobalt(II), nickel(II), copper(II) and zinc(II) complexes of azo ligand 4-[(5-acetyl-2-aminophenyl)-diazenyl]-1,5-dimethyl-2-phenyl-1H-pyrazol-3(2H)-one derived from 4-aminoantipyrine and 4-aminoacetophenone are reported. The nature of the compounds have been studied followed by mole ratio and methods of continuous contrast, Beer′s law followed during a condensation rate (1 × 10-4 – 3 × 10-4 M). The analytical data showed that all the complexes are in 1:2 metal-ligand ratio. An octahedral geometry have been suggested for all the compounds and biological studies of all the complexes were evaluated against different types of antimicrobial strains.

ABSTRACT. The azo ligand obtained from the diazotization reaction of 2-aminobenzothiazole and 4-nitroaniline yielded a novel series of complexes with Co(II), Ni(II), Cu(II), and Zn(II) ions. The complexes were investigated using spectral techniques such as UV-Vis, FT-IR, 1H and 13C NMR spectroscopic analyses, LC-MS and atomic absorption spectrometry, electrical conductivity, and magnetic susceptibility. The molar ratio of the synthesized compounds was determined using the ligand exchange ratio, which revealed the metal-ligand ratios in the isolated complexes were 1:2. The synthesized complexes were tested for antimicrobial activity against S. aureus, E. coli, C. albicans, and C. tropicalis bacterial species.  Additionally, their binding affinities were predicted using molecular docking analysis, and their pharmacokinetic and drug-likeness properties were evaluated.   KEY WORDS: Azo ligand, Metal complexes, Antimicrobial studies, Molecular docking study   Bull. Chem. Soc. Ethiop. 2023, 37(4), 931-944.                                                              DOI: https://dx.doi.org/10.4314/bcse.v37i4.10