THE MILLIMETER-WAVE ROTATIONAL SPECTRUM AND CORIOLIS INTERACTION IN THE TWO LOWEST EXCITED VIBRATIONAL STATES OF CHCLF2

摘要

The millimeter-wave rotational spectrum of (CHClF2)-Cl-35 (Freon CFC-22) in the two lowest excited vibrational states,nu(9) and nu(6), was measured up to 470 GHz and assigned to J = 80. The data set consists of over 850 transitions for the two states and is reduced in two ways. For easy reproduction of the spectrum effective A- and S-reduction Watsonian sextic-level constants for each state are derived from fitting the data limited to J '' less than or equal to 50. The most satisfactory data reduction is, however, obtained by taking into account the Coriolis interaction between the two vibrational states; a simultaneous fit of all the data results in an accurate value for the interstate separation and in Coriolis coefficients, zeta(6,9)((a)) and zeta(6,9)((c)), and vibration-rotation constants, alpha, which are in good agreement with values from ab initio calculations. (C) 1995 Academic Press, Inc. [References: 17]