New Materials, Compounds and Applications

In this study, the one-step synthesis of bis-(2,4-bis(trichloromethyl))-1,3,5-triazapentadienato Me(II) complexes were achieved through the reaction of trichloroacetonitrile with ammonia in the presence of metal salts (Ni, Cu, Pd, Zn). The molecular structures of the synthesized compounds were characterized via X-ray diffraction analysis. Particular attention was given to the halogenated ligand-containing complexes due to their exceptional thermal and chemical stability and solubility in organic solvents. The Zn(II) complex was evaluated in the Henry reaction and demonstrated significant catalytic activity. Moreover, the Tris-(2,4-bis(trichloromethyl))-1,3,5-triazapentadienato Co(III) complex was synthesized and its crystal structure was elucidated. Hirshfeld surface analysis revealed key intermolecular interactions, such as strong N—H···O hydrogen bonds, C—H···Cl halogen bonds and weaker C–Cl···Cl halogen interactions, which play a crucial role in crystal packing. The antimicrobial activity of the Co(III) complex was evaluated against various Gram-positive and Gram-negative bacteria, as well as yeast strains, using the agar diffusion method. The compound demonstrated the highest activity against Staphylococcus aureus, exceeding its effects on other tested microorganisms. These findings highlight the potential of these triazapentadienato metal complexes as promising candidates for antimicrobial applications and catalytic processes.