CH3O+

Vibrational and/or electronic energy levels

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: Marilyn E. Jacox

State:   1E,3E
 Energy 
 (cm-1) 		  Med.   Transition   λmin 
 (nm) 		  λmax 
 (nm) 		  References
Tx = 35700 T gas Zhu, Ge, et al., 2000

State:   b
 Energy 
 (cm-1) 		  Med.   Transition   λmin 
 (nm) 		  λmax 
 (nm) 		  References
To = 23720 ± 100 gas Zhu, Ge, et al., 2000

State:   a
 Energy 
 (cm-1) 		  Med.   Transition   λmin 
 (nm) 		  λmax 
 (nm) 		  References
To = 13880 ± 100 gas Zhu, Ge, et al., 2000

State:   X

Vib. 
sym. 		  No.   Approximate 
 type of mode 		  cm-1   Med.   Method   References
1 CH2 s-stretch 2717 A gas PF Mosley, Cheng, et al., 2012
2 CH stretch 2469 A gas PF Mosley, Cheng, et al., 2012
a1 3 CO stretch 1950 ± 60 gas PE Zhu, Ge, et al., 2000
b2 CH2 a-stretch 2747 A gas PF Mosley, Cheng, et al., 2012

Additional references: Jacox, 1994, page 235; Jacox, 2003, page 256; Ruscic and Berkowitz, 1991

Notes

TTentative assignment or approximate value
oEnergy separation between the v = 0 levels of the excited and electronic ground states.
xEnergy separation between the band maximum of the excited electronic state and the v = 0 level of the ground state.
A0~1 cm-1 uncertainty

References

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Zhu, Ge, et al., 2000
Zhu, X.J.; Ge, M.F.; Wang, J.; Sun, Z.; Wang, D.X., First Experimental Observation on Different Ionic States of both Methylthio (CH3S.) and Methoxy (CH3O.) Radicals, Angew. Chem. Int. Ed., 2000, 39, 11, 1940, https://doi.org/10.1002/1521-3773(20000602)39:11<1940::AID-ANIE1940>3.0.CO;2-H . [all data]

Mosley, Cheng, et al., 2012
Mosley, J.D.; Cheng, T.C.; McCoy, A.B.; Duncan, M.A., Infrared Spectroscopy of the Mass 31 Cation: Protonated Formaldehyde vs Methoxy, J. Phys. Chem. A, 2012, 116, 37, 9287, https://doi.org/10.1021/jp3072298 . [all data]

Jacox, 1994
Jacox, M.E., Vibrational and electronic energy levels of polyatomic transient molecules, American Chemical Society, Washington, DC, 1994, 464. [all data]

Jacox, 2003
Jacox, M.E., Vibrational and electronic energy levels of polyatomic transient molecules: supplement B, J. Phys. Chem. Ref. Data, 2003, 32, 1, 1-441, https://doi.org/10.1063/1.1497629 . [all data]

Ruscic and Berkowitz, 1991
Ruscic, B.; Berkowitz, J., Photoionization mass spectrometric studies of the isomeric transient species CD2OH and CD3O, J. Chem. Phys., 1991, 95, 4033. [all data]

Notes

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