Bond stretching force constant
= Bond stretching force constant
{title2=$k$}
In a local harmonic approximation, the vibrational wavenumber obeys $\widetilde\nu=(2\pi c)^{-1}\sqrt{k/\mu}$. Comparisons at fixed <reduced mass> therefore use squared frequency ratios. A local stretching force constant is not identical to a <bond-dissociation energy>.