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Lille Spectroscopic Database
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Version 2022.06
Tag 47802
Molecule - Descriptor Dimethyl Ether, Methoxymethane (CH3OCH2D) - a-conformer, vt=0
Isotope D
Hyperfine N/A
Lines in DB 23694
Frequency max. (MHz) 1499953.5155
J max. 91
Cite these data as Richard C., Margulès L., Caux E., Kahane C., Ceccarelli C., Guillemin J.-C., Motiyenko R.A., Vastel C., Groner P. 2013, A&A, 552, A117 https://doi.org/10.1051/0004-6361/201220826
Predictions Partition Function Quantum Numbers Format References

T(K) Qt Qrot Qvib
300.0 98011.358 98011.358 1.0
225.0 63635.248 63635.248 1.0
150.0 34630.166 34630.166 1.0
75.0 12247.850 12247.85 1.0
37.5 4336.772 4336.772 1.0
18.75 1538.516 1538.516 1.0
9.375 547.782 547.782 1.0
5.0 216.022 216.022 1.0
2.275 68.462 68.462 1.0

Energy levels of an asymmetric top with a single internal rotor of C3v symmetry

Code:
RAM36/RAM36hf
Output Format:
J Ka Kc m

Details: Each energy level is characterized by the asymmetric-top quantum numbers J, Ka, and Kc, together with the free-rotor quantum number m. When table includes hyperfine levels, the standard quantum number F = J + I is included in the level designation.

The correspondence between the m quantum number used in the .cat file and the vibrational–torsional quantum number vt, as well as the associated symmetry species Γ = A or E of the C3v point group, is summarized in the table below.

m 0 1 -3 -2 3 4 -6 -5 6 7
vt 0 0 1 1 2 2 3 3 4 4
Γ A E A E A E A E A E
Measurements

  • Niide Y., Hayashi M. 2003, J. Mol. Spec., 220, 65–79
  • Blukis U., Kasai P.H., Myers R.J. 1963, J. Chem. Phys., 38, 2753–2760
Dipole moments

  • Blukis U., Kasai P.H., Myers R.J. 1963, J. Chem. Phys., 38, 2753–2760