Synthesis, characterization, crystal structure and Hirshfeld surface analysis of 1-(4-ethoxyphenyl)-3-(4-methylphenyl) prop-2en-1-one

The title compound 1-(4-ethoxyphenyl)-3-(4-methylphenyl) prop-2en-1-one has been synthesized, characterized by NMR, IR and mass spectral analysis, and finally the structure was confirmed by single crystal X-ray diffraction studies. The title compound C18H18O2 crystallizes in the monoclinic crystal system, in P21/c space group with unit cell parameters, a = 5.884(3)Å, b = 17.472(1)Å, c = 14.375(8)Å, β = 99.268(10)° and Z = 4. The crystal structure of the title compound exhibits intra molecular interaction of the type CH···O and the molecular structure is stabilized by short contacts (π···π and CH···π interactions). Further, the Hirshfeld surface analysis reveals the nature of molecular interactions; the fingerprint plot provides the information about the percentage contribution from each individual intermolecular contacts, and it shows that the H···H interactions has the major contribution (54.7)

Structural investigations and theoretical insights of a polymethoxy chalcone derivative: Synthesis, crystal structure, 3D energy frameworks and SARS CoV-2 docking studies

Chalcone derivatives with various functional groups have shown potent pharmacological and non-linear optical properties. A multi-methoxy substituted (E)-1-(3,4-dimethoxyphenyl)-3-(3,4,5-trimethoxyphenyl) prop-2-en-1-one, chalcone derivative has been synthesized and spectroscopically characterized by 1H and C-13 NMR, LC-MS and FT-IR techniques. A pale yellow colored rectangular shaped single crystals of the compound were obtained by slow evaporation method and the three dimensional structure was confirmed using X-ray diffraction studies. The compound crystallized in the monoclinic crystal system with P2(1)/a space group. The crystal and molecular structure is stabilized by C-H center dot center dot center dot O inter and intra molecular hydrogen bond interactions apart from the prominent C-H center dot center dot center dot pi and pi center dot center dot center dot pi stacking interactions. These interactions were studied using Hirshfeld surface analysis to understand the nature and strength of interactions; the 2D fingerprint plot quantifies each individual intermolecular contact and revealed that the H.H (49.2%) interactions have the major contribution to the molecular surface. The analysis of 3D molecular energy frameworks revealed that the dispersion energy (-208.16 kJ mol(-1)) dominates all other energies and their visualization identifies the packing order of the molecules in the crystalline environment. The lattice energy of the compound is found to be -398.1 kJ mol(-1). The electronic properties of the compound were quantified using theoretical quantum chemical computations with DFT-B3LYP/6-311+ G (d, p) level basis set. The electronic energy band gap of the chalcone molecule is found to be 3.6961 eV. The NBO and Mulliken atomic charges were computed and the molecular electrostatic potential map was plotted to identify the chemical reactive sites on the molecular surface. The second-order nonlinear optical properties of the molecule based on the first static hyperpolarizability (ss) have been investigated. Further, the molecular docking studies of the chalcone derivative against corona virus 2 (SARS-CoV-2) protein have been carried out to shed light on the possible significant molecular interactions. (c) 2022ElsevierB.V. Allrightsreserved