title: Vibrational spectroscopic (FT-IR, FT-Raman, ¹H NMR and UV) investigations and computational study of 5-nitro-2-(4-nitrobenzyl) benzoxazole.
abstract: The optimized molecular structure, vibrational frequencies, corresponding vibrational assignments of 5-nitro-2-(4-nitrobenzyl) benzoxazole have been investigated experimentally and theoretically using Gaussian09 software package. Potential energy distribution of the normal modes of vibrations was done using GAR2PED program. The energy and oscillator strength calculated by time dependent density functional theory almost compliments with experimental findings. Gauge-including atomic orbital (1)H NMR chemical shifts calculations were carried out by using B3LYP functional with 6-31G basis set. The HOMO and LUMO analysis is used to determine the charge transfer within the molecule. The stability of the molecule arising from hyper-conjugative interaction and charge delocalization have been analyzed using NBO analysis. MEP was performed by the DFT method and the predicted infrared intensities and Raman activities have also been reported. The calculated geometrical parameters are in agreement with that of similar derivatives.
authors.affiliation: Department of Chemistry, Mar Ivanios College, Nalanchira, Trivandrum, Kerala, India.
authors.forename: J B
authors.initials: JB
authors.lastname: Bhagyasree
authors.forename: Hema Tresa
authors.initials: HT
authors.lastname: Varghese
authors.forename: C Yohannan
authors.initials: CY
authors.lastname: Panicker
authors.forename: Jadu
authors.initials: J
authors.lastname: Samuel
authors.forename: Christian
authors.initials: C
authors.lastname: Van Alsenoy
authors.forename: Kayhan
authors.initials: K
authors.lastname: Bolelli
authors.forename: Ilkay
authors.initials: I
authors.lastname: Yildiz
authors.forename: Esin
authors.initials: E
authors.lastname: Aki
mesh_terms: D001583:Benzoxazoles / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D009578:Nitrobenzenes / Q000737:chemistry*; D011789:Quantum Theory; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D001583:Benzoxazoles; D009578:Nitrobenzenes