Synthesis, experimental spectra (IR & Raman and NMR), vibrational analysis and theoretical DFT investigations of N-(5-(4-methylbenzoyl)-2-oxo-4-(4-methylphenyl)pyrimidine-1(2H)-yl)-4-methylbenzamide.
The title molecule, N-(5-(4-methylbenzoyl)-2-oxo-4-(4-methylphenyl)pyrimidine-1(2H)-yl)-4-methylbenzamide (C27H23N3O3), was synthesized and characterized by elemental analysis, IR, Raman, (1)H and (13)C NMR spectral data. To determine conformational flexibility, potential energy surfaces of the title compound were obtained by DFT regarding the selected degree of torsional freedom, which was varied from 0° to 360° in 6° and 20° steps. The ten conformers of the title compound were determined and it was found that the conformer 1 basis the most stable one. All conformers were also optimized by using the density functional theory (DFT/B3LYP) method with the 6-31G(d,p), 6-311G(d,p) and cc-pVDZ basis sets in the ground state. Potential energy distribution was calculated with the 6-31G(d,p) basis set. The vibrational spectra were recorded in solid phase IR and Raman spectra were compared based on the results of the theoretical calculations. The formation of hydrogen bonds was explained using natural bond orbital (NBO) analysis and spectroscopic analysis. NMR analysis and frontier molecular orbitals (FMOs) were also investigated by DFT.
Erciyes University, Faculty of Science, Department of Chemistry, Kayseri, Turkey. Electronic address: lkarasu@erciyes.edu.tr.
Lütfiye
L
Aydın
Erciyes University, Faculty of Science, Department of Chemistry, Kayseri, Turkey.
Emine
E
Şahan
Erciyes University, Faculty of Science, Department of Chemistry, Kayseri, Turkey.
Zülbiye
Z
Önal
Erciyes University, Faculty of Science, Department of Chemistry, Kayseri, Turkey.
Talat
T
Özpozan
D001549:Benzamides / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D008968:Molecular Conformation; D011743:Pyrimidines / Q000737:chemistry*; D011789:Quantum Theory; D017550:Spectroscopy, Fourier Transform Infrared; D013059:Spectrum Analysis, Raman
D001549:Benzamides; D011743:Pyrimidines; C038530:N-methylbenzamide; C030986:pyrimidine
4-Methylbenzamide; DFT; FT-IR; NMR; Pyrimidine-2-one; Raman