DFT, FT-Raman, FT-IR and FT-NMR studies of 4-phenylimidazole

Gulluoglu M. T., ERDOĞDU Y., Karpagam J., Sundaraganesan N., Yurdakul Ş.

JOURNAL OF MOLECULAR STRUCTURE, cilt.990, ss.14-20, 2011 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 990
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1016/j.molstruc.2011.01.001
  • Dergi Adı: JOURNAL OF MOLECULAR STRUCTURE
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.14-20
  • Anahtar Kelimeler: 4-Phenylimidazole, FTIR, FT-Raman spectra, OFT, NBO, NMR, NORMAL-COORDINATE ANALYSIS, VIBRATIONAL-SPECTRA, AB-INITIO, SPECTROSCOPY, IMIDAZOLES
  • Gazi Üniversitesi Adresli: Evet

Özet

The experimental and theoretical vibrational spectra of 4-phenylimidazole (4-PI) were studied. The FT-IR, FT-Raman and FT-NMR spectra of 4-PI molecule was recorded in the powder form. The tautomeric, structural and spectroscopic analysis of the title molecule was made by using density functional harmonic calculations. For the title molecule, only one tautomeric form was found most stable structure by using B3LYP level with the 6-311G(d,p) and 6-311G++(d,p) as basis set. Selected experimental bands were assigned and characterized based on the scaled theoretical wave numbers by their total energy distribution (TED). Stability of the molecule arising from hyperconjugative interactions, charge delocalization has been analyzed using natural bond orbital (NBO) analysis. The results show that charge in electron density (ED) in the sigma(+) anti-bonding orbitals and E-2 energies confirms the occurrence of intermolecular charge transfer (ICT) within the molecule.