Cinar M.Karabacak M.Asiri A.M.2024-07-222024-07-22201513861425http://akademikarsiv.cbu.edu.tr:4000/handle/123456789/16387In this article, a brief conformational and spectroscopic characterization of 5-methoxyindole-2-carboxylic acid (5-MeOICA) via experimental techniques and applications of quantum chemical methods is presented. The conformational analysis of the studied molecule was determined theoretically using density functional computations for ground state, and compared with previously reported experimental findings. The vibrational transitions were examined by measured FT-IR and FT-Raman spectroscopic data, and also results obtained from B3LYP and CAM-B3LYP functionals in combination with 6-311++G(d,p) basis set. The recorded proton and carbon NMR spectra in DMSO solution were analyzed to obtain the exact conformation. Due to intermolecular hydrogen bondings, NMR calculations were performed for the dimeric form of 5-MeOICA and so chemical shifts of those protons were predicted more accurately. Finally, electronic properties of steady compound were identified by a comparative study of UV absorption spectra in ethanol and water solution and TD-DFT calculations. © 2014 Elsevier B.V. All rights reserved.EnglishCarbonCrystallography, X-RayDimerizationElectronsEthanolHydrogen BondingIndolesMagnetic Resonance SpectroscopyModels, MolecularMolecular ConformationOrganic ChemicalsProtonsQuantum TheorySoftwareSpectrophotometrySpectrophotometry, UltravioletSpectroscopy, Fourier Transform InfraredSpectrum Analysis, RamanWaterConformationsDensity functional theoryElectronic propertiesGround stateHydrogen bondsNuclear magnetic resonance spectroscopyQuantum chemistryWater absorption5-methoxyindole-2-carboxylic acidalcoholcarbonindole derivativeorganic compoundprotonwater5-Methoxyindole-2-carboxylic acidDensity functional computationsDensity-functional studyExperimental techniquesIntermolecular hydrogen bondingQuantum chemical calculationsQuantum-chemical methodsSpectroscopic characterizationchemical structurechemistrycomputer programconformationdimerizationelectronhydrogen bondinfrared spectroscopynuclear magnetic resonance spectroscopyquantum theoryRaman spectrometryspectrophotometryultraviolet spectrophotometryX ray crystallographySpectroscopic analysisArticle10.1016/j.saa.2014.08.090