Add time:08/09/2019         Source:sciencedirect.com

This context explains the condensation of various arylsulfonohydrazides with two pyrazole aldehydes to get corresponding hydrazones (6a-f). The hydrazones synthesized were confirmed with the help of IR, NMR, Mass and single crystal X-ray diffraction techniques. From the X-ray analysis it was observed that, all the three compounds 6a, 6c and 6f crystallizes in monoclinic crystal system with P21/c, P21/n and P21/n space group respectively. The intermolecular hydrogen bond interactions of the type NH⋯O, CH⋯O, CH….C, OH ⋯O, OH⋯N and CH⋯N plays a significant role in the stability of the molecules. The 3D Hirshfeld analyses and 2D fingerprint plots were helpful in decoding the behavior of the interactions and their quantitative contributions towards the packing structure of the crystals. In addition to this, TGA and DTA curves were helpful in explaining the thermal stability of the compounds. Additionally, the antibacterial effectiveness of the molecules synthesized (6a-f) was analyzed against Gram-negative and Gram-positive strains. Interestingly, the compounds with fluorinated pyrazoles (6a and 6c) emerged as good bacterial inhibitors, having scope to produce potent therapeutics in future.

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