THE SUBMILLIMETER-WAVE SPECTRUM OF ALLYL ALCOHOL $(CH_{2}=CHCH_{2}OH)$

$^{a}$A. N. Murty and R. F. Curl, Jr., J. Chem Phys. 46, 4176-4180(1967) $^{b}$H. Badawi, P. Lorencak, K. W. Hillig II. M. Imachi and R. L. Kuczkowski, J. Mol. Struc. 162 247-254 (1987). $^{c}$S. Melandri, P. G. Favero and W. Caminati, Chem. Phys. Let. 223, 541-545(1994).Author Institution: Jet Propulsion Laboratory, California Institute of TechnologyTwo isomers of allyl alcohol have been further studied in selected regions of the submillimeter and microwave spectra. The skew-gauche and syn-gauche conformations have been previously identified at room $temperature^{a,b}$ and in a $free-jer^{c}$, respectively. The present study positively identifies the syn-gauche conformer in the gas-phase at room temperature and confirms that tunneling, as opposed to internal rotation, of the hydroxyl proton is the predominant perturbation up to $K_{a}=30$, Further measurements made in the X-band, at kHz precision, have increased the precision of the Coriolis coupling terms an energy level(tunneling) splitting. Extension of the spectral measurements has provided a set of spectral parameters that can accurately predict spectral line frequencies through much of sub-millimeter