THE SPECTROSCOPY AND DYNAMICS OF THE HF-DF AND DF-HF DIMERS: DISSOCIATION ENERGIES AND FINAL STATE DISTRIBUTIONS

1. E. J. Bohac, M.D. Marshall, R. E. Miller, {J. Chem. Phys}. 96, 6681 (1992). 2. M. Quack, M. A. Suhm, {J. Chem. Phys}. 96, 28 (1991).Author Institution: Dept. of Chemistry, University of N. CarolinaInfrared spectra have been recorded for both isomers of the HF-DF dimer, namely where either the HF or the DF act as the proton donor. For the case of HF-DF we have observed both the $K_{a} = 0 \leftarrow 0$ and the $K_{a}=1 \leftarrow 0$ sub bands associated with the HF stretch. For the DF-HF isomer only the $K_{a}=0 \leftarrow 0$ sub-band is observed since the proton donor lies very nearly along the A-axis of the complex. Photofragment angular distributions have also been recorded for all three sub-bands, yielding information on the final rotational state distributions. The results agree with the earlier work of HF $dimer^{1}$, which showed with the proton donor molecule is highly rotationally excited while the acceptor molecule is preferentially produced is low j states. Dissociation energies are also reported for both of the isomers and compared with the results of recent theoretical $calculations^{2}$