Spectroscopic characterization and natural bond orbital analysis of 2-(trifluoromethyl) phenylacetonitrile based on DFT calculations

padmavathy, M. ; Seshadri, S


The experimental Fourier transform infrared (FT-IR) and Fourier transform Raman (FT-Raman) spectra of 2-(trifluoromethyl)phenylacetonitrile (2TFMP) have been recorded in the spectral region 4000‒400 cm−1 and 3500‒100 cm−1, respectively. Also the title molecule has been characterized by 13C NMR and 1H NMR spectroscopes. The geometry optimization and frequency calculations have been performed at B3LYP/6-311+G (d,p) level.  A detailed interpretation of FT-IR and FT-Raman spectra aided by the potential energy distributions (PEDs) for the calculated frequencies has been reported. Results of this study showed that there is a good correlation between the experimental and computational results. The HOMO-LUMO energy gap explains the charge transfer interactions in the molecule. NBO (natural bond orbital) computations have been utilized to evaluate the stabilities which occur from charge delocalization and inter-molecular interactions have been studied using DFT calculations



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