Knowledge Bank

The vibration-rotation band of nitrous oxide associated with the absorption of the fundamental bending vibration $\nu 2$ at 17$\mu$ has been remeasured with a 2000-lines-per-inch grating, and the following values are obtained for the molecular constants: $\nu 0=588.78cm-1$, $B000=0.41903cm-1$, $\alpha 2PR=0.000164cm-1$, $D\prime =D\prime \prime =0.19\times 10-6cm-1$. It is found as in $CO2$ that there is no change in the centrifugal stretching constants for the two states involved in the $transition.1$ This result therefore does not confirm the 8% change in the D values for the two states reported by Christensen and $Thompson.2$ It is felt that the data of these authors are probably affected by the overlapping ``hot” bands due to inadequate resolution.