title: Infrared and Raman spectroscopic analyses and theoretical computation of 4-butyl-1-(4-hydroxyphenyl)-2-phenyl-3,5-pyrazolidinedione.
abstract: Infrared and Raman spectroscopic analyses were carried out on 4-butyl-1-(4-hydroxyphenyl)-2-phenyl-3,5-pyrazolidinedione. The interpretation of the spectra was aided by DFT calculation of the molecule. The vibrational wavenumbers were examined theoretically using the Gaussian03 set of quantum chemistry codes and the normal modes were assigned by potential energy distribution calculations. A computation of the first hyperpolarizability of the compound indicates that the compound may be a good candidate as a NLO material. Optimized geometrical parameters are in agreement with the reported XRD results. The RMS error of the observed Raman bands and IR bands are found to be 35.09 and 39.57 for HF method and 14.31 and 17.17 for DFT method. The predicted infrared intensities and Raman activities are reported.
authors.affiliation: Department of Chemistry, SN College, Kollam 691001, Kerala, India.
authors.forename: P S
authors.initials: PS
authors.lastname: Binil
authors.forename: Y Sheena
authors.initials: YS
authors.lastname: Mary
authors.forename: Hema Tresa
authors.initials: HT
authors.lastname: Varghese
authors.forename: C Yohannan
authors.initials: CY
authors.lastname: Panicker
authors.forename: M R
authors.initials: MR
authors.lastname: Anoop
authors.forename: T K
authors.initials: TK
authors.lastname: Manojkumar
mesh_terms: D008968:Molecular Conformation; D010113:Oxyphenbutazone; D011720:Pyrazoles / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013059:Spectrum Analysis, Raman
chemical_list: D011720:Pyrazoles; C031280:pyrazole; D010113:Oxyphenbutazone