Torsion‐Vibration‐Rotation Interactions in Methanol. II. Microwave Spectrum of CD3OD

1972 ◽  
Vol 56 (12) ◽  
pp. 5887-5890 ◽  
Author(s):  
R. M. Lees
Keyword(s):  
Microwave Spectrum ◽  
Torsion Vibration ◽  
Vibration Rotation

Millimetre wave spectrum of methyl mercaptan

1980 ◽  
Vol 58 (11) ◽  
pp. 1640-1648 ◽  
Author(s):  
R. M. Lees ◽  
M. Ali Mohammadi
Keyword(s):  
Interstellar Medium ◽  
Least Squares ◽  
Wave Spectrum ◽  
Methyl Mercaptan ◽  
Rotational Spectrum ◽  
Centrifugal Distortion ◽  
Millimetre Wave ◽  
Torsion Vibration ◽  
Vibration Rotation ◽  
Centrifugal Distortion Constants

An investigation of the rotational spectrum of CH332SH, one of the most recent molecules to be detected in the interstellar medium, has been carried out over the 25–107 GHz region. The frequencies of a-type Δk = 0 R-branch transitions have been measured for the J = 1 ← 0 up to J = 4 ← 3 multiplets for torsional states νt = 0–3. In addition, many P-, Q-, and R-branch transitions with Δk ≠ 0 have been identified in order to provide a catalogue of lines for potential radio astronomical applications. Improved values of rotational and centrifugal distortion constants, a-type torsion–vibration–rotation interaction constants, and torsional barrier parameters (V3 = 444.76 cm−1; effective V6 = −2.07 cm−1) have been determined from least-squares analyses of the spectra.

Vibration-Rotation Interaction in the Microwave Spectrum of KOH

1975 ◽  
Vol 30 (10) ◽  
pp. 1256-1260 ◽  
Author(s):  
P. Kuijpers ◽  
T. Törring ◽  
A. Dymanus
Keyword(s):  
Fine Structure ◽  
Microwave Spectrum ◽  
Vibrational Modes ◽  
Vibration Rotation

Abstract The fine structure of the microwave transition J=6←5 of 39KOH and 41KOH has been studied. The analysis results in improved vibration-rotation interaction constants, a1 , a2, y22, yll and ql. It is shown that coupling between the bending and stretching vibrational modes contributes to the observed frequencies.

Diode laser spectra of the torsional splittings in the ν9 band of ethane: Torsion‐vibration‐rotation interactions and the barrier to internal rotation

1982 ◽  
Vol 77 (6) ◽  
pp. 2728-2744 ◽  
Author(s):  
J. Susskind ◽  
D. Reuter ◽  
D. E. Jennings ◽  
S. J. Daunt ◽  
W. E. Blass ◽  
...  
Keyword(s):  
Internal Rotation ◽  
Diode Laser ◽  
Torsion Vibration ◽  
Vibration Rotation

Microwave Spectrum of Acetyl Cyanide in the Ground and Excited States. I

1976 ◽  
Vol 31 (7) ◽  
pp. 840-846
Author(s):  
F. Scappini ◽  
H. Dreizler
Keyword(s):  
Internal Rotation ◽  
Excited States ◽  
Microwave Spectrum ◽  
Coupling Constants ◽  
Rotational Constants ◽  
Microwave Spectra ◽  
Torsion Vibration ◽  
Quadrupole Coupling ◽  
Rotation Parameters

Abstract The microwave spectra of acetyl cyanide, CH3COCN, in the ground and in the two lowest excited states have been investigated. The rotational constants and the quadrupole coupling constants have been evaluated for all these states. The internal rotation parameters have been refined with respect to previous works. Evidence for a rotation-torsion -vibration interaction has been found in the spectra of the excited states.

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