MICROWAVE AND MILLIMETER-WAVE SPECTRA OF (CD3OH)-C-13

The microwave and millimeter-wave absorption spectra of C-13-substitut ed CD3OH have been investigated in the frequency range 18-116 GHz. All transition frequencies have been measured for the J = 1 <-- 0 to J = 3 <-- 2 a-type R-branch multiplets for the lowest three torsional stat es. Asymmetry splittings were observed for the K = 1 and 2 lines of th e A torsional symmetry species. In addition, frequencies have been mea sured for a substantial number of b-type transitions in the torsional ground state, including the K = 1 <-- 0 E(1), K = 1 <-- 2 E(1), and K = 3 <-- 2A Q and branches. The measured frequencies of the a-type tran sitions have been fitted to a semiempirical torsion-rotation Hamiltoni an and accurate a-type spectroscopic parameters have been determined. (C) 1995 Academic Press, Inc.