Determination of the structure of ArHF

摘要

Radiohyphen;frequency and microwave spectra ofKequals; 0 states of ArHF in the ground vibrational state have been measured by molecular beam electric resonance spectroscopy. The rotational constant is (Bplus;C)sol;2equals;3065.719 MHz; the component of the dipole moment along the a inertial axis is mgr;aequals; 1.332 D. From the centrifugal distortion constant,DJequals; 72.1 kHz, the stretching frequency of the van der Waals bond is estimated to be 42.1 cmminus;1. In analogy with ArHCl the internal Arsngbnd;Fsngbnd;H angle thgr; is expected to be acute and theaveragevalue of the angle is 48.20deg;. Theequilibriumconfiguration is likely to be near linear with atomic arrangement ArHF. The vibrationally averaged Arsngbnd;F distance is 3.540 Aring;.