Investigation of ground state tautomeric form of a heterocyclic disazo dye derived from barbituric acid by ab initio Hartree-Fock and density functional theory calculations


UCUN F. , Saglam A., KARA İ., KARCI F.

JOURNAL OF MOLECULAR STRUCTURE-THEOCHEM, cilt.868, ss.94-100, 2008 (SCI İndekslerine Giren Dergi) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 868
  • Basım Tarihi: 2008
  • Doi Numarası: 10.1016/j.theochem.2008.08.009
  • Dergi Adı: JOURNAL OF MOLECULAR STRUCTURE-THEOCHEM
  • Sayfa Sayıları: ss.94-100

Özet

The optimized molecular structures, vibrational frequencies and corresponding vibrational assignments of 10 tautomeric forms of a heterocyclic disazo dye [5-(3-methyl-4-phenylazo-1H-pyrazole-5-ylazo) barbituric acid] have been calculated using ab initio Hartree-Fock (HF) and density functional theory (B3LYP) methods with 6-31G(d,p) basis set level. Calculations have shown that the most probably preferential form of the heterocyclic disazo barbituric acid dye in the ground state is azo-hydrazo-keto form corresponding to the experimental results. (C) 2008 Elsevier B.V. All rights reserved.