TABLE 12-1 Bond Stretching Frequencies Stretching Frequency Bond baeag (cm-) Frequency dependence on atomic masses 420 83350 12001 Frequency dependence on bond energies 83(350) 1200 60 increases 8 H Bond energies and frequencies are approximate H H symmetric stretching antisymmetric stretching (H bending(scissoring) Chl2 IR and MS Page5Ch12 IR and MS Page5