Experimental and theoretical characterization of the 2-(4-bromobenzyl)-5-ethylsulphonyl-1,3-benzoxazole
| Autor: | Celal Tuğrul Zeyrek, Kamran Polat, Hüseyin Ünver, Özlem Temiz Arpaci, Nazan Ocak İskeleli, Mustafa Yildiz |
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| Přispěvatelé: | Ondokuz Mayıs Üniversitesi |
| Rok vydání: | 2015 |
| Předmět: |
Benzoxazoles
Organic Chemistry Nonlinear optical effects Benzoxazole Analytical Chemistry PES scan Inorganic Chemistry chemistry.chemical_compound chemistry Computational chemistry Potential energy surface Density functional theory Physical chemistry Molecule Organic light-emitting diode Spectroscopy Ground state Basis set Natural bond orbital |
| Zdroj: | Journal of Molecular Structure. 1081:22-37 |
| ISSN: | 0022-2860 |
| DOI: | 10.1016/j.molstruc.2014.10.001 |
| Popis: | Unver, Huseyin/0000-0003-3968-4385; Polat, Kamran/0000-0001-7617-2480 WOS: 000347495400004 Synthesis, crystal structure, Fourier transform infrared spectroscopy (FT-IR) and quantum mechanical studies of the 2-(4-bromobenzyl)-5-ethylsulphonyl-1,3-benzoxazole (C16H14NO3SBr) have been reported. The molecular structure obtained from X-ray single-crystal analysis of the investigated compound in the ground state has been compared using Hartree-Fock (HF) and density functional theory (DFT) with the functional B3LYP and B1B95 using the 6-311++G(d,p) basis set. In addition to the optimized geometrical structures, atomic charges, molecular electrostatic potential (MEP), natural bond orbital (NBO), nonlinear optical (NLO) effects and thermodynamic properties of the compound have been investigated by using DFT. The potential energy surface (PES) scans about four important torsion angles are performed by using B3LYP/6-311++G(d,p) level of theoretical approximation for the compound. The experimental (FT-IR) and calculated vibrational frequencies (using DFT) of the title compound have been compared. The total molecular dipole moment (mu), linear polarisability (alpha), and the first-order hyperpolarisability (beta) were predicted by using DFT with different basis sets 6-31G(d), 6-31+G(d,p), 6-31++G(d,p), 6-311+G(d) and 6-311++G(d,p) for investigating the effects of basis sets on the NLO properties. Our computational results yield that beta(tot) for the title compound is greater than those of urea. The standard thermodynamic functions were obtained for the title compound with the temperature ranging from 200 to 450 K. (C) 2014 Elsevier B.V. All rights reserved. |
| Databáze: | OpenAIRE |
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