Angle-bending wavenumbers

Table 6.3 lists a number of group vibration wavenumbers for both bond-stretching and angle-bending vibrations. 

Table 6.3 Typical bond-stretching and angle-bending group vibration wavenumbers co...

The wavenumber of the totally symmetric bending vibration, dsss> of S rings (n = 6, 7, 9, 10, 12), on the other hand, is mainly a function of the ring size and not a function of the quite different bond angles in these molecules, as one may expect. The empirically obtained relation is given by... 

---