THE MICROWAVE SPECTRUM OF ARGON-PHOSPHORUS TRIFLUORIDE

Abstract

The $argon-PF_{3}$ complex has been prepared in a supersonic expansion of Ar (98%) and $PF_{3} (2%)$. A Fourier-transform microwave spectrometer employing a Fabry-Perot cavity was used to assign 28 rotational transitions. The rotational constants (MHz) and distortion constants (kHz) were $A = 7332.468(10), B = 1023.055(2), C = 952.564(2), D_{J} = 3.53(1), D_{JK} = 60.4(1)$ and $d_{1} = -0.240(7)$. The argon atom is $3.953 A (r_{cm})$ from the $PF_{3}$ center of mass and $r_{cm}$ makes an angle of $70.3^{\circ}$ with the $C_{3}$ axis of the $PF_{3}$.