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Spectroscopic, X-Ray Crystallographic, and Hirshfeld Surface Analyses for the Investigation of Intermolecular Interactions in Carboxamide Hydrazone Hybrids
(WILEY-V C H VERLAG GMBH, POSTFACH 101161, 69451 WEINHEIM, GERMANY, 2025) Kheder, Nabila A.; Salem, Mostafa E.; Soliman, Saied M.; Elhaty, Ismail A.; Mahmoud, Naglaa S.; Abdel-Megid, Mohamed; Dawood, Kamal M.
The current study reports a convenient synthetic approach to carboxamide hydrazone hybrids 2a, b. Their chemical structures are investigated using infrared, nuclear magnetic resonance, and mass spectroscopies. In addition, the 3D structure of 2a is explored using single-crystal X-ray analysis, while the important intermolecular contacts are described based on the Hirshfeld analysis. Fukui function, highest occupied molecular orbitallowest unoccupied molecular orbital, molecular electrostatic potential, and Mulliken charge analysis reveal distinct electrophilic and nucleophilic regions of hydrazone 2a, and support its stability and moderate chemical reactivity. Their antimicrobial potency is also evaluated against six microbial strains. Compound 2b shows significant antibacterial activity against Staphylococcus aureus compared to Gentamicin.