Totally symmetric vibrational modes of fullerene C-60

Semiempirical molecular orbital calculations are carried out for the totall y symmetric vibrations of the C-60 molecule. The calculated equilibrium geo metry coincides with the precision experimental data to within measurement error. The ratio of force constants calculated for the two different types of C-C bonds in fullerene is equal to 1.389. A comparison of the computatio nal results with the Raman scattering data indicates that there may be Ferm i resonance between the totally symmetric vibrations. (C) 2000 MAIK "Nauka/ Interperiodica".