Abstract
The structure of the synthesized title compound is characterized by IR, UV-visible spectroscopy, and single crystal X-ray diffraction (XRD). The new compound (C18H23NS) crystalizes in the monoclinic P21/c space group. In addition to the crystal structure from the X-ray experiment, the molecular geometry, vibrational frequencies, atomic charge distribution, and frontier molecular orbital (FMO) analysis of the title compound in the ground state are calculated by density functional teory (B3LYP) with 6-311G(d,p) and 6-31G(d,p) basis sets. The results of the optimized molecular structure are presented and compared with the experimental values. The computed vibrational frequencies are used to determine the types of molecular motions associated with each of the observed experimental bands. To determine the conformational flexibility, the molecular energy profile of (1) is obtained by semi-empirical (AM1) and (PM3) calculations with respect to a selected degree of torsional freedom. Moreover, molecular electrostatic potential (MEP) and thermodynamic parameters of the title compound were calculated by the theoretical methods.
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Original Russian Text Copyright © 2012 by Ç. Yüksektepe, N. Çalışkan, I. Yılmaz, and A. Çukurovalı
The text was submitted by the authors in English. Zhurnal Strukturnoi Khimii, Vol. 53, No. 1, pp. 68–77, January–February, 2012.
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Yüksektepe, Ç., Çalışkan, N., Yılmaz, I. et al. Molecular and crystal structure, spectroscopic properties of 2-methyl-4-(3-methyl-3-phenyl-cyclobutyl)-thiazole determined by the experimental method and a quantum chemical calculation. J Struct Chem 53, 63–72 (2012). https://doi.org/10.1134/S0022476612010088
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DOI: https://doi.org/10.1134/S0022476612010088