THE STRUCTURE OF Ar HCl

Abstract

The Van der Waals’ complex of argon and hydrogen chloride is produced by expansion of Ar and HCl through a supersonic nozzle. The structure of the ArHCl molecule has been determined by molecular beam electric resonance spectroscopy. The rotational constants for the molecule are: \begin{eqnarray*} B(ArHCl^{35}) &=& 1678511. kHz \ D(ArHCl^{35}) &=& 20.33 kHz \ (ArHCl^{37}) &=& 1631566. kHz \ B-2D (ArDCl^{35}) &=& 1657596. kHz \ (ArDCl^{37}) &=& 1611876. kHz \end{eqnarray*} The axial component of the dipole moment and chlorine quadrupole coupling constant are: \begin{eqnarray*} \mu\quad (ArHCl^{35}) &=& 0.8114 D \ eqQ\quad (ArHCl^{35}) &=& -23027. kHz \ \mu\quad (ArDCl^{35}) &=& 1.004 D \ eqQ\quad (ArDCl^{35}) &=& -36250.kHz \end{eqnarray*}