Synthesis, crystal structure, spectroscopic characterization and theoretical study of (2E)-N-phenyl-2-(pyridin-3-ylmethylidene)hydrazinecarboxamide

• A new synthetized semicarbazone was characterized by FT-IR, FT-Raman, NMR and SCXRD.
• Theoretical calculations were performed and compared with the experimental results.
• Non covalent interactions analysis visualize the interactions in the crystal packing.
• Excellent theory (in gas phase)-experiment fitting was achieved.

In this work, the experimental and theoretical study of new semicarbazone have been reported. The new semicarbazone was synthesized and characterized by FT-IR, FT-Raman and NMR, and the crystal structure was determined by X-ray single-crystal diffraction. The crystallographic asymmetric unit was optimized using DFT method and compared with the experimental data. The experimental FT-IR and FT-Raman have been compared with calculated vibrational frequencies, using B3LYP/6-311*G(d,p). The stability and charge delocalization were studied by natural bond orbital (NBO) analysis as well as the molecular electrostatic potential (MEP). The 1H and 13C chemical shifts values have been calculated by the GIAO method. Non covalent interactions analysis in real space was done, based on the electron density and its derivates, it provides a rich representation of VdW interactions, hydrogen bonds, and the inter and intramolecular steric repulsions.

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