Sub-millimeter wave spectroscopy of CHD 2 OH: a -type and asymmetry induced c -type transitions in the lowest three torsional sub-levels

The rotation-torsion spectrum of CD2HOH

“…The rotational assignments reported by this author in Tables 1 and 2 of Ref. [21] for the K = 5, o 1 ← 4, e 1 subband, for parallel transitions within the e 0 , o 1 , and e 1 torsional states, and for a few perpendicular transitions are only partially consistent with those in our previous investigation [20]. In Table 2 of Ref.…”

“…Several subbands reported in our previous investigation [20] were reported almost at the same time by Mukhopadhyay [21][22][23]. The rotational assignments reported by this author in Tables 1 and 2 of Ref.…”

“…72 torsional subbands could be assigned and the number of available parallel and perpendicular transitions, including those assigned in this work and those reported in Refs. [21,23,24], is 4853. These transitions were fitted simultaneously using the Taylor-type expansions of Eqs.…”

“…In Table 2 of Ref. [21], at least four lines are missassigned. The parallel transition at 333335.082 MHz does not belong to the K = 3, e 1 torsional state, but to K = 3, o 1 ; the parallel transition at 333163.863 MHz does not belong to K = 7, o 1 but to K = 4, o 1 ; the perpendicular transition at 353983.299 MHz is not a J = 6 ← 7 line, but a J = 7 ← 8; and the perpendicular transition at 312334.867 MHz does not belong to the K = 6, e 1 ← 5, e 1 torsional subband.…”

“…It was first spectroscopically investigated by Quade and coworkers [5][6][7]19] using microwave spectroscopy and transitions involving torsional levels up to K = 2 and v t = 6 were assigned. Later, new transitions were recorded in the microwave and far-infrared (FIR) domains [20][21][22][23][24] allowing us to spectroscopically characterize all torsional levels with 3 ≤ K ≤ 9 and v t ≤ 2. Rotation-torsion transitions were analyzed approximating the rotational energy of each torsional state with a J(J +1) Taylor-type expansion.…”