title: DFT analysis of P-nitrobenzotrifluoride--a combined study of experimental (FT-IR and FT-Raman) and theoretical calculations.
abstract: In this, a combined experimental and theoretical study on molecular structure and vibrational analysis of P-nitrobenzotrifluoride (PNBTF) is reported. The Fourier transform infrared and FT-Raman was recorded in the solid phase. The molecular geometry and vibrational frequencies of PNBTF in the ground state have been calculated by using density functional method (B3LYP) with 6-311++G(d,p) as basis set. Comparison of the observed fundamental vibrational frequencies with calculated results by density functional methods indicates that B3LYP/6-311++G(d,p) is superior to other methods for molecular vibrational problems. The bioactivity of the compound is analyzed by the HOMO-LUMO analysis. The reactivity sites are identified by mapping of electron density into electrostatic potential surface (MEP). Besides, (13)C and (1)H nuclear magnetic resonance (NMR) chemical shifts are calculated by using the gauge-invariant atomic orbital (GIAO) method. Furthermore, the compound can be used as a good nonlinear optical material due to the higher value of first hyperpolarizability. Solventation effect of NMR spectra by CPCM model of P-nitrobenzotrifluoride has been analyzed.
authors.affiliation: P.G & Research Department of Physics, A.A. Government Arts College, Musiri 621 211, Tamil Nadu, India. Electronic address: jjmarivu@yahoo.co.in.
authors.forename: M
authors.initials: M
authors.lastname: Arivazhagan
authors.affiliation: P.G & Research Department of Physics, A.A. Government Arts College, Musiri 621 211, Tamil Nadu, India.
authors.forename: D Anitha
authors.initials: DA
authors.lastname: Rexalin
authors.affiliation: Department of Physics, M.I.E.T Engineering College, Tiruchirappalli 620 007, Tamil Nadu, India.
authors.forename: G
authors.initials: G
authors.lastname: Ilango
mesh_terms: D002251:Carbon Tetrachloride / Q000737:chemistry; D004121:Dimethyl Sulfoxide / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D008968:Molecular Conformation; D009578:Nitrobenzenes / Q000737:chemistry*; D017711:Nonlinear Dynamics; D055620:Optical Phenomena; D011789:Quantum Theory; D012997:Solvents / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D013059:Spectrum Analysis, Raman; D055672:Static Electricity; D014050:Toluene / Q000031:analogs & derivatives* / Q000737:chemistry; D014732:Vibration
chemical_list: D009578:Nitrobenzenes; D012997:Solvents; D014050:Toluene; D002251:Carbon Tetrachloride; D004121:Dimethyl Sulfoxide
keywords: CPCM; HOMO–LUMO; MEP; NLO; NMR; PNBTF