Synthesis,molecular structure,IR and Raman spectra as well as DFT chemical calculations for alkylamides of thiocyanoacetic acid |
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Authors: | E. Kucharska,J. Lorenc,W. Sa̧ siadek,H. Ban‐Oganowska,Z. Talik,J. Hanuza,M. Ma̧ czka |
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Abstract: | This paper reports on room‐temperature infrared (IR) and Raman studies and vibrational characteristics of amide and thiocyano groups of R‐NH‐CO‐CH2‐SCN n‐alkylamides of thiocyanoacetic acid (R = C8H17, C9H19, C12H25 and C14H29). Their molecular structure has been proposed on the basis of optimization process. The experimental wavenumbers have been compared to those obtained from discrete Fourier transform (DFT) quantum chemical calculations performed with the use of B3LYP/6–31G(d,p) approximation. The role of the hydrogen bonds in the stabilization of the structure has been analyzed. It was found that the hydrogen bonding and strong dynamic interactions between the unit cell components are responsible for the deviation of several theoretical wavenumbers from the experimental ones. Copyright © 2009 John Wiley & Sons, Ltd. |
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Keywords: | alkylamides of thiocyanoacetic acid amide group thiocyano group IR and Raman spectra DFT chemical calculations hydrogen bonds |
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