Stabilization energy, geometry and v(2) mode of CO2 molecule in EDA co
mplexes with organic electron donors are ab initio modeled using SPART
AN program. We prove that the splitting of v(2) mode, observed previou
sly in IR spectra, is an effect of removing the double degeneracy of t
his mode in the complex resulted from the deformation of CO2 moiety. T
he dependence of the deformation on complex stabilization energy is di
scussed.