Knowledge Bank

The integrated infrared band intensities of the fundamental vibrational modes in $SF6$ have been measured by the Wilson-Wells-Penner-Weber method. The results are $1361\pm 34$ km $mol-1$ for the fundamental at $948cm-1$, and $74\pm 2$ km $mol-1$ for the fundamental at $615cm-1$. The transition moments derived from these measurements are $0.437\pm 0.025$ Debye for the $948cm-1$ fundamental and $0.126\pm 0.003$ Debye for the $615cm-1$ band. The transition moment was also derived from single line strengths in the $948cm-1$ band and found to be $0.42\pm 0.03$ Debye, in good agreement with the value found from band intensities.