ИК спектроскопия конформационных переходов в молекулах 1,2 –дихлорэтана и 1,1.2,2 -тетрабромэтана, инфильтрованных в нанопористые стекла

The results of studying the IR absorption spectra under the condition of impaired total internal reflection of 1,2-dichloroethane and 1,1,2,2-tetrabromoethane in porous glasses with different pore radii are presented. The changes in the intensities of the trans and gauche conformations in the studied systems were determined for different pore radii of glass R. The dependences of the differences of the free energies of trans and gauche conformations for 1,2-dichloroethane and 1,1,2,2-tetrabromoethane on the pore radius of porous glass were obtained. At R > 3.5 nm, an increase in the number of g-conformers is observed for 1,2-dichloroethane, while an increase in the number of t-conformers is observed for1,1,2,2-tetrabromoethane . Keywords: IR spectra, porous glasses, trans-, gauche conformation, 1,2 - dichloroethane, 1,1,2,2, -tetrabromoethane, free energy of conformation.