title: Conformational stability, vibrational (FT-IR and FT-Raman) spectra and computational analysis of m-trifluoromethyl benzoic acid.
abstract: In this work, the vibrational characteristics of m-trifluoromethyl benzoic acid have been investigated and both the experimental and theoretical vibrational data indicate the presence of functional groups in the title molecule. The density functional theoretical (DFT) computations were performed at the B3LYP/6-31G (d, p), LSDA/6-31G (d, p), MP2/6-31G (d, p) levels to derive the optimized geometry, vibrational wavenumbers. Furthermore, the molecular orbital calculations such as natural bond orbitals (NBO), HOMO-LUMO energy gap and Mapped molecular electrostatic potential (MEP) surfaces, The Mulliken charges, the first-order hyperpolarizability were also performed with the same level of DFT. The thermal flexibility of molecule in associated with vibrational temperature was also illustrated on the basis of correlation graphs. The detailed interpretation of the vibrational spectra has been carried out with the aid of potential energy distribution (PED) results obtained from MOLVIB program. The delocalization of electron density of various constituents of the molecule has been discussed with the aid of NBO and HOMO-LUMO energy gap analysis.
authors.affiliation: Research Department of Physics, AA Government Arts College, Musiri 621211, India. Electronic address: brsbala@rediffmail.com.
authors.forename: V
authors.initials: V
authors.lastname: Balachandran
authors.affiliation: Department of Physics, Sri Saradha College for Women, Perambalur 621212, India.
authors.forename: V
authors.initials: V
authors.lastname: Karpagam
authors.affiliation: PG Department of Physics, Government Arts College, Karur 639005, India.
authors.forename: G
authors.initials: G
authors.lastname: Santhi
authors.affiliation: Research Department of Physics, AA Government Arts College, Musiri 621211, India.
authors.forename: B
authors.initials: B
authors.lastname: Revathi
authors.affiliation: Department of Physics, M.I.E.T. Engineering College, Tiruchirappalli 620007, India.
authors.forename: G
authors.initials: G
authors.lastname: Ilango
authors.affiliation: Research Department of Physics, AA Government Arts College, Musiri 621211, India.
authors.forename: M
authors.initials: M
authors.lastname: Kavimani
mesh_terms: D008968:Molecular Conformation; D017550:Spectroscopy, Fourier Transform Infrared; D013059:Spectrum Analysis, Raman; D055672:Static Electricity; D013816:Thermodynamics; D014050:Toluene / Q000031:analogs & derivatives* / Q000737:chemistry; D014732:Vibration
chemical_list: D014050:Toluene; C055606:3-trifluoromethylbenzoate
keywords: DFT calculations; IR and Raman; NCA; PED; Thermodynamic functions; m-Trifluoromethyl benzoic acid