Volume 111, Issue 9 pp. 2123-2136
Properties, Dynamics, and Electronic Structure of Atoms and Molecules

Combined experimental and computational modeling studies on 4-[(2-hydroxy-3-methylbenzylidene) amino]-1,5-dimethyl-2-phenyl-1,2-dihydro-3H-pyrazol-3-one

Hasan Tanak

Corresponding Author

Hasan Tanak

Department of Physics, Faculty of Arts and Sciences, Ondokuz Mayıs University, Kurupelit, Samsun 55139, Turkey

Department of Physics, Faculty of Arts and Sciences, Ondokuz Mayıs University, Kurupelit, Samsun 55139, TurkeySearch for more papers by this author
Ayşen Ağar

Ayşen Ağar

Department of Chemistry, Faculty of Arts and Sciences, Ondokuz Mayıs University, Kurupelit, Samsun 55139, Turkey

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Metin Yavuz

Metin Yavuz

Department of Physics, Faculty of Arts and Sciences, Ondokuz Mayıs University, Kurupelit, Samsun 55139, Turkey

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First published: 21 April 2011
Citations: 28

Abstract

The Schiff base compound, 4-[(2-hydroxy-3-methylbenzylidene)amino]-1,5-dimethyl-2-phenyl-1,2-dihydro-3H-pyrazol-3-one, has been synthesized and characterized by IR, UV–vis, and X-ray single-crystal determination. Molecular geometry from X-ray experiment of the title compound in the ground state have been compared using the density functional method (B3LYP) with 6-31G(d,p) basis set. Calculated results show that density functional theory (DFT) can well reproduce the structure of the title compound. The energetic behavior of the title compound in solvent media has been examined using B3LYP method with the 6-31G(d,p) basis set by applying the Onsager and the polarizable continuum model (PCM). The results obtained with these methods reveal that the PCM method provided more stable structure than Onsager's method. By using TD-DFT method, electronic absorption spectra of the title compound have been predicted and a good agreement with the TD-DFT method and the experimental one is determined. The predicted nonlinear optical properties of the title compound are much greater than ones of urea. In addition, DFT calculations of the title compound, molecular electrostatic potential and NBO analysis were performed at B3LYP/6-31G(d,p) level of theory. © 2010 Wiley Periodicals, Inc. Int J Quantum Chem, 2011

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