The investigation of antimicrobial activity of some s-substituted bis-1,2,4-triazole-3-thiones

New S-substituted 4-alkyl-5-((3-(pyridin-4-yl)-1H-1,2,4-triazole-5-yl)thio)methyl)-4H-1,2,4-triazole-3-thiol derivatives have been designed, synthesized and studied their antimicrobial activity on 11 standard Gram-positive and Gram-negative microorganism strains. Their spectral and physicochemical parameters were established using modern comprehensive methods of analysis, including H-1 NMR spectroscopy, GC-MS and elemental analysis.It has been found that compound 2a exhibits strong suppression of 5 test strains (MBC = 15.6 mu g/mL). Compound 4a showed moderate inhibition of Salmonella pullorum, Escherichia coli O-2, Salmonella enteritidis strains (MBC = 31.25 mu g/mL) Compound 6a was sensitive toward ten tested bacteria at 31.25 mu g/mL concentration.