title: Molecular structure, spectroscopic studies (FTIR, FT-Raman and NMR) and HOMO-LUMO analysis of 6-chloro-o-cresol and 4-chloro-3-methyl phenol by density functional theoretical study.
abstract: In this work, the experimental and theoretical vibrational spectra of 6-chloro-o-cresol (COC) and 4-chloro-3-methylphenol (CMP) have been studied. FTIR and FT-Raman spectra of the title compounds in the solid phase are recorded in the region 4000-400 cm(-1) and 4000-50 cm(-1), respectively. The structural and spectroscopic data of the molecules in the ground state are calculated by using density functional methods (B3LYP) with 6-31G basis set combinations. The calculated vibrational frequencies are scaled by normal coordinate analysis based on a scaled quantum mechanical force field. The obtained values are compared with experimental FTIR and FT-Raman spectra. The observed and calculated frequencies are found to be in good agreement. The complete vibrational assignments are performed on the basis of the total energy distribution (TED) of the vibrational modes, calculated with scaled quantum mechanical (SQM) method. The results of (13)C and (1)H NMR chemical shift are compared with the experimental values.
authors: Department of Physics, Periyar University, Salem 636 011, India. vkrishna_kumar@yahoo.com
authors: V
authors: V
authors: Krishnakumar
authors: M
authors: M
authors: Kumar
authors: N
authors: N
authors: Prabavathi
authors: R
authors: R
authors: Mathammal
mesh_terms: D003198:Computer Simulation; D003408:Cresols / Q000737:chemistry*; D016014:Linear Models; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D008968:Molecular Conformation; D011789:Quantum Theory; D017550:Spectroscopy, Fourier Transform Infrared; D013059:Spectrum Analysis, Raman; D013816:Thermodynamics; D014732:Vibration
chemical_list: C578118:6-chloro-o-cresol; D003408:Cresols; C006984:chlorocresol; C034047:2-cresol