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    Synthesis, crystal structure, Hirshfeld surface analysis and DFT calculations of 2-[(2,3-dimethylphenyl)amino]-N?-[(E)-thiophen-2-ylmethylidene]benzohydrazide
    (Elsevier, 2020) Albayati, Mustafa R.; Kansiz, Sevgi; Dege, Necmi; Kaya, Savas; Marzouki, Riadh; Lgaz, Hassane; Salghi, Rachid
    Hydrazones are an important class of organic compounds, which exhibit large pharmacological applications. Hydrazones have long been used for the synthesis of a wide range of useful heterocyclic compounds due to their reactivity toward electrophiles and nucleophiles. Herein, a hydrazone derivative, 2-[(2,3-dimethylphenyl)amino]-N'-[(E)-thiophen-2-ylmethylidene]benzohydrazide, noted C20H19N3OS was synthesized and its three-dimensional structure was determined by X-ray crystallography. Structural characterization by X-ray crystallography was supported by Density Functional Theory (DFT) calculations. Intermolecular interactions in the crystal network were determined using Hirshfeld surface analyses. The optimized geometry, global reactivity descriptors, Natural Bond Orbital (NBO) analysis, and HOMO-LUMO orbitals of the molecule were computed using the DFT-B3LYP method and 6-311++G (d,p) basis set. C20H19N3OS has a monoclinic system and P2(1)/c space group with parameters a = 13.9774 (13) angstrom, b = 16.3851 (16) angstrom, c = 8.2101 (8) angstrom, beta = 105.429 (7)degrees and Z = 4. C20H19N3OS forms an S (6) ring motif with an intramolecular N-H center dot center dot center dot O hydrogen bond. In the crystal, the molecule chains along the c-axis direction are linked by C-H center dot center dot center dot O hydrogen bond. Atomic charges were predicted using the Mulliken population and the NBO theory. The molecular electrostatic potential (MEP) picture was drawn using the same level of theory to visualize the chemical reactivity and charge distribution on the molecule. The local reactivity was examined by determining the Fukui functions and dual descriptor indices. (c) 2019 Elsevier B.V. All rights reserved.
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    Synthesis, experimental and theoretical characterization of (E)-2-((2,3-dimethylphenyl)amino)-N?-(furan-2-ylmethylene) benzohydrazide
    (Elsevier, 2020) Albayati, Mustafa R.; Kansiz, Sevgi; Lgaz, Hassane; Kaya, Savas; Dege, Necmi; Ali, Ismat H.; Salghi, Rachid
    Hydrazone derivatives have drawn much attention because of their large pharmacological applications. In the present work, the compound (E)-2-((2,3-dimethylphenyl)amino)-N'-(furan-2-ylmethylene)benzohydrazide, noted C20H19N3O2 was synthesized, and its 3D structure was determined by X-ray crystallography. Structural characterization by X-ray crystallography was supported by Density Functional Theory (DFT) and Hartree Fock (HF) calculations. Intermolecular interactions in the crystal network were determined using Hirshfeld surface analyses. The optimized geometry, global reactivity descriptors, Natural Bond Orbital (NBO) analysis, and HOMO-LUMO of the molecule were computed using the DFTB3LYP method and 6-311++G (d,p) basis set. The C20H19N3O2 has a monoclinic system and P2(1)/c space group with parameters a = 13.8181 (10) angstrom, b = 16.1969 (10) angstrom, c = 8.1285 (7) angstrom, b = 104.546 (6)degrees and Z = 4. It forms an S(6) ring motif with an intramolecular NdH center dot center dot center dot O hydrogen bond. Hirshfeld surface analysis and 2D fingerprint plots signify meaningful interactions in crystal packing [H center dot center dot center dot H (47.2%), C center dot center dot center dot H/ H center dot center dot center dot C (29%), and O center dot center dot center dot H/H center dot center dot center dot O (13.3%) contacts]. Atomic charges were predicted using the Mulliken population and the NBO theory. The molecular electrostatic potential (MEP) picture was drawn using the same level of theory to visualize the chemical reactivity and charge distribution on the molecule. The local reactivity was examined by determining the Fukui functions and dual descriptor indices. (C) 2020 Elsevier B.V. All rights reserved.