首页|Molecular structure and vibrational spectra of phenobaraitone by density functional theory and ab initio hartree-Fock calculations
Molecular structure and vibrational spectra of phenobaraitone by density functional theory and ab initio hartree-Fock calculations
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Quantum chemistry calculations have been performed using Gaussian03 program to compute optimized geometry,harmonic vibrational frequency along with intensities in IR and Raman spectra at RHF/6-31++G**and B3LYP/6-31++G** levels for phenobarbitone (C12H12N2O3) in the ground state.The scaled harmonic vibrational frequencies have been compared with experimental FT-IR and FT-Raman spectra.Theoretical vibrational spectra of the title compound were interpreted by means of potential energy distributions (PEDs) using MOLVIB program.A detailed interpretation of the infrared spectra of the title compound is reported.On the basis of the agreement between the calculated and observed results,the assignments of fundamental vibrational modes of phenobarbitone were examined and some assignments were proposed.The theoretical spectrograms for FT-IR and FT-Raman spectra of the title compound have been constructed.
phenobarbitonevibrational spectraHF ab initio calculationdensity functional theory (DFT)
Ruizhou ZHANG、Xiaohong LI、Xianzhou ZHANG
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College of Physics and Engineering, Henan University of Science and Technology, Luoyang 471003, China
College of Physics and Information Engineering, Henan Normal University, Xinxiang 453007, China
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