title: DFT, FT-Raman, FT-IR, HOMO-LUMO and NBO studies of 4-Methylmorpholine.
abstract: The experimental FT-IR (4000-400 cm(-1)) and FT-Raman (3500-100 cm(-1)) spectra of 4-Methylmorpholine were recorded. The observed bands were interpreted with the aid of normal coordinate analysis and force field calculations based on density functional theory (DFT) using B3LYP functional theory (DFT) using B3LYP functional with 6-311+G and 6-3++G basis sets. The complete assignments were performed on the basis of the potential energy distribution (PED) of the vibrational modes, calculated with scaled quantum mechanical (SQM) method. The molecular structure and vibrational frequencies, infrared intensities and Raman scattering actives have been calculated frequency showed the best agreement with experimental results. The formation of the hydrogen bond was investigated using NBO calculations. The calculated HOMO and LUMO energies show that charge transfer occur within the molecule. The dipolemoment (μ) and polarizability (α), anisotropy polarizability (Δα) and first hyperpolarizability (β(total)) of the molecule have been reported.
authors.affiliation: Research Department of Physics, Arignar Anna Government Arts College, Musiri, Tiruchirapalli 621211, India. brsbala@rediffmail.com
authors.forename: V
authors.initials: V
authors.lastname: Balachandran
authors.forename: G
authors.initials: G
authors.lastname: Mahalakshmi
authors.forename: A
authors.initials: A
authors.lastname: Lakshmi
authors.forename: A
authors.initials: A
authors.lastname: Janaki
mesh_terms: D007700:Kinetics; D008958:Models, Molecular; D008968:Molecular Conformation; D009025:Morpholines / Q000737:chemistry*; D011789:Quantum Theory; D017550:Spectroscopy, Fourier Transform Infrared; D013059:Spectrum Analysis, Raman; D055672:Static Electricity; D013816:Thermodynamics; D014732:Vibration
chemical_list: D009025:Morpholines; C038816:4-methylmorpholine