ROTATIONAL ANALYSIS OF THE V(7),V(11) (A',A'') PAIR OF BANDS OF THE INFRARED-SPECTRUM OF THE DEUTERIUM SUBSTITUTED PROPYNAL MOLECULE C2H-CENTER-DOT-CDO

The mid-infrared spectrum of the nu(7),nu(11) (a',a'') pair of bands o f the deuterium substituted propynal molecule C2H . CDO was recorded a t a resolution of about 0.08 cm(-1). An analysis of the pair of bands was completed using the method of simulation of the observed bands wit h synthetic spectra taking into account the effects of second order Co riolis interactions between the energy levels of the two bands. Best f it values for the changes in the rotational constants (A'' - A'), (B'' - B') and (C'' - C'), the second order Coriolis constant zeta(7,11) a nd the delta(7,11) = nu(11) - nu(7) constant have been derived.