The geometries of hyperlithiated compounds OLin were optimized by means of
HF, MP2 and DFT methods with 6-31G(*) basis set. The dissociation energies
of those optimized stable geometries of OLi8, were calculated, the results
are in good agreement with experimental values; and moreover, the dissociat
ion energy of OLi6 is predicted. In addition, the fundamental vibrational f
requencies were also predicted.