THE SUBMILLIMETER ROTATION SPECTRUM OF DCL

The pure rotation spectra of both D35Cl and D37Cl were recorded at Doppler resolution with tunable far infrared spectroscopy. ΔJ = +1 rotational transitions were measured and assigned, with J″ ranging from 0 to 16. The hyperfine structure of the rotational lines, due to the quadrupole moment in the chlorine nucleus, was only partially resolved. The Hamiltonian used for the analysis contained terms up to the sixth power in the angular momentum, the first-order quadrupole interaction, and the nuclear magnetic interaction. New, more accurate molecular parameters are determined. © 1992.