Knowledge Bank

The integrated intensities of the $A2u$ and $F1u$ fundamental bands in liquid $C6H6$ and $C6D6$ were determined by analysis of the anomolous dispersion curves for these liquids. The intensities for the $A2a$ modes at $673cm-1$ and $496cm-1$ in $C6H6$ and $C6D6$, respectively, are 14 350$\pm$110and8,600$\pm$$110 cm^{-1}$$cm^{2}$/millimole. Intensity sum rules are used to test the internal consistency of these measurements and to investigate factors which effect infrared intensities in liquids.