Structure and Vibrational Spectra of 1,3,5-Trimethoxybenzene |
| A. Pawlukojća, G. Batorb and L. Sobczykb
aJoint Institute for Nuclear Research, 141980 Dubna, Russia and Institute of Nuclear Chemistry and Technology, Dorodna 16, 03-195 Warsaw, Poland bFaculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50-383 Wrocław, Poland |
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| Received: 26 10 2007; |
| Inelastic neutron scattering infrared and Raman spectra of the crystalline 1,3,5-trimethoxybenzene were measured and compared with simulated ones by using the Gaussian 98 and DMol3 programs at density functional theory methods. Application of the double numerical plus polarization basis set for the crystalline state within the local density Perdew and Wang (PWC functionals) approximation quite well reproduces the low frequency bands related to the methyl group librational modes, which are very sensitive to molecular interactions. Infrared spectra for the crystalline sample and CCl4 solution show spectacularly the change of low frequency modes by going from the symmetric D3h molecules in the gas phase to asymmetric ones in the crystal. |
| DOI: 10.12693/APhysPolA.112.S-171 PACS numbers: 78.30.-j, 78.70.Nx, 61.66.Hq |