Spectroscopic investigations and molecular docking study of 3-(1H-imidazol-1-yl)-1-phenylpropan-1-one, a potential precursor to bioactive agents

• Published in: Journal of molecular structure 2016-04, Vol.1109, p.131-138
• Main Authors: Al-Alshaikh, Monirah A., Mary Y, Sheena, Panicker, C. Yohannan, Attia, Mohamed I., El-Emam, Ali A., Alsenoy, C. Van
• Format: Article
• Language: English
• Subjects: Charge; Charge transfer; Derivatives; DFT; Hyperpolarizability; Imidazole; Mathematical analysis; Molecular docking; Molecular orbitals; Molecular structure; NBO; Nitrogen atoms
• ISSN: 0022-2860; 1872-8014
• DOI: 10.1016/j.molstruc.2015.12.075

The optimized molecular structure, vibrational wavenumbers, corresponding vibrational assignments of 3-(1H-imidazol-1-yl)-1-phenylpropan-1-one have been investigated theoretically and experimentally. The calculated geometrical parameters of the title compound are in agreement with the reported XRD data. The HOMO and LUMO analysis is used to determine the charge transfer within the molecule. The stability of the molecule arising from hyper-conjugative interaction and charge delocalization has been analyzed using NBO analysis. Molecular electrostatic potential was performed by the DFT method and from the MEP plot, it is evident that the negative charge covers the carbonyl group and the nitrogen atom N3 of the imidazole ring and the positive region is over the remaining portions of the molecule. The first and second hyperpolarizabilities are calculated and the first hyperpolarizability of the title compound is 16.99 times that of standard NLO material urea and the title compound and its derivatives are good object for further studies in nonlinear optics. The docked ligand title compound forms a stable complex with plasmodium falciparum and gives a binding affinity value of −5.5 kcal/mol and the preliminary results suggest that the compound might exhibit antimalarial activity against plasmodium falciparum. [Display omitted] •IR, Raman spectra and NBO analysis were reported.•The wavenumbers are calculated theoretically using Gaussian09 software.•The geometrical parameters are in agreement with that of similar derivatives.•Molecular docking the results suggest that the compound might exhibit antimalarial activity against plasmodium falciparum.