Raman and infrared spectra of new organic metals (ET)8[Hg4X12(C6H5Y)2], X, Y = Cl, Br

One studied the Raman spectra and spectra of infrared reflection of new organic metals on the basis of BEDT-TTF molecule with (ET)8[Hg4X12(C6H5Y)2], X, Y = Cl, Br differing from the compounds studied previously in type of package of ET molecules within quasi-two-dimensional conducting layers. Within the reflection IR spectrum one observed high reflection and plasma minimum demonstrating the occurrence of quasi-free charge carriers (holes). However, bands of Ag-oscillations observed within the Raman spectrum were not activated within the IR spectrum as it was previously observed for ET conducting salts with other types of packages. One assigned the Raman spectrum lines to the normal oscillations of ET molecule and defined their ionization shifts. The frequencies of ν3(Ag) most intensive lines were shown to fit in the linear dependence on the charge on a cation typical for ET different salts