BEDT-TTF, BMDT-TTF and BEDO-TTF are well known thio-TTF and oxo-TTF (i
n the former case) derivatives on the basis of which cation-radical sa
lts with 2D type of conductivity can be produced. In this work the com
parative analysis of electron-molecular vibration coupling constants (
obtained by MNDO quantum-chemical method) that describe the interactio
n between totally symmetric Ag modes and electron on HOMO level is per
formed.