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(searched for: (10.5155/eurjchem.1.1.37-43.10))
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Chacko Yohannan Panicker, Hema Tresa Varghese, Kalappat RamanAmbujakshan Ambujakshan, Samuel Mathew, Subarna Ganguli, Ashis Kumar Nanda, Christian Van Alsenoy, Sheena Mary Yohannan
European Journal of Chemistry, Volume 1; doi:10.5155/eurjchem.1.1.37-43.10

Abstract:
The infrared and Raman spectra of 3-{[(4-methoxyphenyl)methylene]amino}-2-phenylquinazolin-4(3H)-one have been recorded and analysed. Geometry and harmonic vibrational wavenumbers were calculated theoretically using Gaussian 03 set of quantum chemistry codes. Calculations were performed at the Hartree-Fock and DFT (B3LYP) levels of theory using the standard 6-31G* basis. The calculated wavenumbers (B3LYP) agree well with the observed wavenumbers. The proposed assignments of normal modes are based on potential energy distribution (PED) analysis. Calculated infrared intensities and first hyperpolarizability are reported. The prepared compound was identified by NMR and mass spectra. The phenyl C-C stretching modes are equally active as strong bands in both IR and Raman spectra, which are responsible for hyperpolarizability enhancement leading to nonlinear optical activity. The calculated first hyperpolarizability is comparable with the reported values of similar structures and is an attractive object for further studies of non linear optics.
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