Add time:09/25/2019         Source:sciencedirect.com

We report here the synthesis and a combined experimental and theoretical study on molecular structure of 2-thioxo- 3N-(2-methoxyphenyl) −5 [4′-methyl -3′N -(2′-methoxyphenyl) thiazol-2′(3′H)-ylidene] thiazolidin-4-one. The crystal structure has been determined by X-ray diffraction. Crystallographic data revealed that the compound crystallizes in a monoclinic system with a space group of P21/c, with crystal cell parameters: a = 10.618 (3), b = 13.180 (5), c = 15.101 (3) Å, β = 97.766 (16), V = 2093.9(11) A3 and Z = 4. The final R-value was 0.0405 based on 4801 observed reflections. From the dihedral angle values, the structure was found to be significantly non planar. Density functional theory (DFT) calculation were carried out to obtain the ground state optimized geometry of the molecule using B3LYP and HSEH1PBE methods with 6-311G(d,p) basis set. The optimized geometry of the title compound was found to be consistent with the structure determined by X-ray diffraction. The stability of the title compound is due to the presence of a good number of potential donor and acceptor groups establishing intermolecular interactions like CH⋅⋅⋅O, CH⋅⋅⋅S and π-π stacking linking the molecules into dimers with C(6), R22(18) and R22(24) graph sets. In addition, the solid state behaviors of molecules in the crystal were studied using 3D Hirshfeld surface analysis and associated 2D fingerprint plots. Calculated frontier molecular orbitals (FMOs) energies and chemical reactivity parameters indicated that the molecule under investigation exhibits high first hyperpolarizability, typical of a NLO material.

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