title: Combined experimental and theoretical studies on the vibrational spectra of 2-quinolinecarboxaldehyde.
abstract: Combined experimental and theoretical studies have been performed on the structure and vibrational spectra (IR and Raman spectra including far region) of 2-quinolinecarboxaldehyde. Hartree-Fock (HF) and density functional B3LYP calculations have been employed with the 6-311++G(d,p) basis set for investigating the structural and spectroscopic properties of two possible aldehyde rotamers of 2-quinolinecarboxaldehyde. When the O atom of the aldehyde is farther away than the nitrogen atom of the quinoline, 2-quinolinecarboxaldehyde has the lowest possible energy, and thus is in its ground state. The computed vibrational frequencies of this lowest energy rotamer agree also slightly better than those of the higher energy rotamer with the experimental frequencies after the computed frequencies are scaled.
authors: Department of Physics, Faculty of Arts and Sciences, Fatih University, 34500 Istanbul, Turkey. vesileguclu@hotmail.com
authors: V
authors: V
authors: Küçük
authors: A
authors: A
authors: Altun
authors: M
authors: M
authors: Kumru
mesh_terms: D000447:Aldehydes / Q000737:chemistry*; D008958:Models, Molecular; D011789:Quantum Theory; D011804:Quinolines / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013059:Spectrum Analysis, Raman
chemical_list: C570701:2-quinolinecarboxaldehyde; D000447:Aldehydes; D011804:Quinolines