Unsymmetrical 1,1 '-disubstituted ferrocenes: Synthesis of Co(ii), Cu(ii), Ni(ii) and Zn(ii) chelates of ferrocenyl-1-thiadiazolo-1 '-tetrazole,-1-thiadiazolo-1 '-triazole and-1-tetrazolo-1 '-triazole with antimicrobial properties

Condensation reactions of 1,1-diacetylferrocene with different heteroaromatic amines such as, 2-amino-1,3,4-thiadiazole, 5-aminotetrazole and 3-amino-1,2,4-triazole to form unsymmetrically 1,1'-disubstituted ferrocenes have been studied. The obtained compounds have been further investigated for their liganding and biological properties upon chelation with Co(II), Cu(II), Ni(II) and Zn(II) metal ions. The synthesized compounds have been characterized by physical, spectral and analytical data and have been screened against pathogenic bacterial strains e.g., Escherichia coli, Pseudomonas aeruginosa and Staphylococcus aureus, showing moderate activity as antibacterials in vitro .