Knowledge Bank

Molecular beam electric resonance spectroscopy was used to obtain radio frequency and microwave spectra of $Ar\cdot O3$ and $Ar\cdot SO2$ produced in nozzle expansions. The $Ar\cdot O3$ properties include A=12685, B=1947, C=1716 MHz, $\mu a=-.10,\mu b=0.0,\mu c=0.46D$. The separation of Ar from the $O3$ center of mass is 3.42 {\AA}, Similar properties foe Ar $SO2$ are A=10124, B=1486, C=1319 MHz, $\mu a=0.27,\mu b=0.0,\mu c=1.470$. The $Ar\cdot SO2$ center of mass distance is $3.66$ {\AA}. The ozone molecule exhibits large amplitude angular motions within the complex. However, free rotation is not observed as indicated by the dipole moment components of the Complex equalling 90% of the $O3$ moment. The beat equilibrium structure for $Ar\cdot O3$ appears to be that which has the plane of $O3$. perpendicular to the axis connecting Ar and the $O3$ center of mass. The present $Ar\cdot SO2$ data is consistent with internal motions and structure similar to $Ar\cdot O3$.