Transient diode laser absorption spectroscopy of the ν2 fundamental of trans‐HOCO and DOCO

摘要: We report the observation and assignment of ν2 fundamental vibration in HOCO DOCO radicals. The radical was made by photolysis acetic acid or acid‐d at 193 nm a flow system. observed spectra indicate that excited vibrational level is perturbed both DOCO. In HOCO, rotational levels ν2=1 have an irregular dependence on Ka quantum number, probably caused anharmonic interactions with combinations lower frequency plane vibrations. An a‐type Coriolis interaction involving perturbation containing one out‐of‐plane torsional cannot be rigorously excluded however. DOCO, there are also N‐dependent perturbations state. Only parallel transitions were assigned isotopomers. K=0 band origin for 1852.567 cm−1 which compares 1843.7 reported previously trapped low‐temperature argon matrix. This absorption spectrum will useful...