ELECTRONIC-SPECTRA OF THE HETEROISOTOPIC CH2D AND CHD2 RADICALS BY RESONANCE ENHANCED MULTIPHOTON IONIZATION

The 3pB-2(1) <-- <-- XB-2(1) bands of CH2D and CHD2 radicals were observed between 305 and 335 nm by mass resolved, 2+ 1 resonance enhanced multiphoton ionization spectroscopy. Spectroscopic constants were found for the 3pB-2(1) Rydberg state of the CH2D radical (v00 = 59 940 cm-1, v1a1 CH2 stretch = 2995 cm-1, v2a1 CD stretch = 2220 cm-1, v4b1 out-of-plane large amplitude (OPLA) = 1260 cm-1, v5b2 CH2 asymmetric stretch = 3055 cm-1, v6b2 CD bend = 1115 cm-1) and of the CHD2 radical (v00 = 59 920 cm-1, v1a1 CH stretch = 3040 cm-1, v2a1 CD2 stretch = 2150 cm-1, v4b1 OPLA = 1165 cm-1, V6b2 CH bend = 12 10 cm-1). Vibrational frequencies calculated by ab initio theory agree well with the experimental data.