Theoretical and FT-IR, FT-Raman studies of nipecotamide and its tautomers, isomers


YURDAKUL Ş., Yasayan N. C.

OPTICS AND SPECTROSCOPY, cilt.114, sa.4, ss.500-508, 2013 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 114 Sayı: 4
  • Basım Tarihi: 2013
  • Doi Numarası: 10.1134/s0030400x13040176
  • Dergi Adı: OPTICS AND SPECTROSCOPY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.500-508
  • Gazi Üniversitesi Adresli: Evet

Özet

The structure, conformers, energies and vibrational spectra of the important nipecotamide molecule have been characterized by FT-IR (mid-IR, far-IR), FT-Raman spectroscopy and by DFT calculations. The structure is optimized by B3LYP/6-311++G(d,p) calculations. All vibrational frequencies assigned in detail with the help of total energy distribution (TED). The calculated vibrational wavenumbers were compared with IR and Ra experimental data. In the most stable tautomer (NT-1), the piperidine ring adopts the chair conformation and the amide group is in the axial orientation and is stabilized by an intramolecular N-HaEuro broken vertical bar O hydrogen bond of 4.37 .