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CH3O2


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:   ?


 Energy 
 (cm-1
 Med.   Transition   «lambda»min 
 (nm) 
 «lambda»max 
 (nm) 
 References

Txd = 42500 T gas 200 300 Parkes, Paul, et al., 1973
Hochanadel, Ghormley, et al., 1977
Anastasi, Smith, et al., 1978
McAdam, Veyret, et al., 1987
Dagaut and Kurylo, 1990
Maricq and Wallington, 1992

State:   A


 Energy 
 (cm-1
 Med.   Transition   «lambda»min 
 (nm) 
 «lambda»max 
 (nm) 
 References

To = 7382.8 ± 0.5 gas A-X 1090 1355 Hunziker and Wendt, 1976
Pushkarsky, Zalyubovsky, et al., 2000
Blanksby, Ramond, et al., 2001
Fu, Hu, et al., 2006
Chung, Chang, et al., 2007


Vib. 
sym. 
 No.   Approximate 
 type of mode 
 cm-1   Med.   Method   References

a' 6 COO a-stretch 993.7 gas PF CR Blanksby, Ramond, et al., 2001
Fu, Hu, et al., 2006
Chung, Chang, et al., 2007
7 COO s-stretch 887 gas PE CR Hunziker and Wendt, 1976
Blanksby, Ramond, et al., 2001
Chung, Chang, et al., 2007
8 COO bend 378 gas CR Chung, Chang, et al., 2007
a 12 CH3 torsion 262 ± 5 gas CR Chung, Chang, et al., 2007

State:   X


Vib. 
sym. 
 No.   Approximate 
 type of mode 
 cm-1   Med.   Method   References

a' 1 CH3 stretch 3033 gas IR Huang, Chu, et al., 2007
1 CH3 stretch 3034.7 He PF Morrison, Agarwal, et al., 2012
1 CH3 stretch 3032 Ar IR Nandi, Blanksby, et al., 2002
2 CH3 stretch 2954 gas IR Huang, Chu, et al., 2007
2 CH3 stretch 2954 Ar IR Nandi, Blanksby, et al., 2002
2 CH3 stretch 2955.5 He PF Morrison, Agarwal, et al., 2012
3 CH3 deform. 1453 ± 2 gas IR Huang, Chu, et al., 2007
3 CH3 deform. 1448 s Ar IR Ase, Bock, et al., 1986
Nandi, Blanksby, et al., 2002
4 CH3 deform. 1408 gas IR Huang, Chu, et al., 2007
4 CH3 deform. 1410 w Ar IR Ase, Bock, et al., 1986
Nandi, Blanksby, et al., 2002
5 Mixed 1183 gas IR Huang, Chu, et al., 2007
5 Mixed 1180 m Ar IR Ase, Bock, et al., 1986
Nandi, Blanksby, et al., 2002
6 Mixed 1117 ± 2 gas PE IR Blanksby, Ramond, et al., 2001
Huang, Chu, et al., 2007
6 Mixed 1109 w m Ar IR Ase, Bock, et al., 1986
Nandi, Blanksby, et al., 2002
7 CO stretch 902 s Ar IR Ase, Bock, et al., 1986
Nandi, Blanksby, et al., 2002
8 COO bend 482 ± 9 gas PE Blanksby, Ramond, et al., 2001
8 COO bend 492 w m Ar IR Ase, Bock, et al., 1986
Nandi, Blanksby, et al., 2002
a 9 CH3 stretch 3020 ± 2 gas IR Huang, Chu, et al., 2007
9 CH3 stretch 3024.5 He PF Morrison, Agarwal, et al., 2012
9 CH3 stretch 3024 ± 2 Ar IR Nandi, Blanksby, et al., 2002
10 CH3 deform. 1441 gas IR Huang, Chu, et al., 2007
10 CH3 deform. 1434 vs Ar IR Ase, Bock, et al., 1986
Nandi, Blanksby, et al., 2002
12 CH3 torsion 170 ± 8 gas CR Chung, Chang, et al., 2007

Additional references: Jacox, 1994, page 321; Jacox, 2003, page 320; Hartmann, Karthauser, et al., 1990; Wu, Dupre, et al., 2007

Notes

wWeak
mMedium
sStrong
vsVery strong
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.
dPhotodissociation threshold

References

Go To: Top, Vibrational and/or electronic energy levels, NIST Free Links, Notes

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

Parkes, Paul, et al., 1973
Parkes, D.A.; Paul, D.M.; Quinn, C.P.; Robson, R.C., The ultraviolet absorption by alkylperoxy radicals and their mutual reactions, Chem. Phys. Lett., 1973, 23, 3, 425, https://doi.org/10.1016/0009-2614(73)85115-2 . [all data]

Hochanadel, Ghormley, et al., 1977
Hochanadel, C.J.; Ghormley, J.A.; Boyle, J.W.; Ogren, P.J., Absorption spectrum and rates of formation and decay of the methyldioxy radical, J. Phys. Chem., 1977, 81, 1, 3, https://doi.org/10.1021/j100516a002 . [all data]

Anastasi, Smith, et al., 1978
Anastasi, C.; Smith, I.W.M.; Parkes, D.A., J. Chem. Soc., 1978, Faraday Trans. 1 74, 1693. [all data]

McAdam, Veyret, et al., 1987
McAdam, K.; Veyret, B.; Lesclaux, R., UV absorption spectra of HO2 and CH3O2 radicals and the kinetics of their mutual reactions at 298 K, Chem. Phys. Lett., 1987, 133, 1, 39, https://doi.org/10.1016/0009-2614(87)80049-0 . [all data]

Dagaut and Kurylo, 1990
Dagaut, P.; Kurylo, M.J., The gas phase UV absorption spectrum of CH3O2 radicals: A reinvestigation, J. Photochem. Photobiol. A: Chem., 1990, 51, 2, 133, https://doi.org/10.1016/1010-6030(90)87047-F . [all data]

Maricq and Wallington, 1992
Maricq, M.M.; Wallington, T.J., Absolute UV cross sections of methyl and ethyl peroxy radicals, J. Phys. Chem., 1992, 96, 2, 986, https://doi.org/10.1021/j100181a081 . [all data]

Hunziker and Wendt, 1976
Hunziker, H.E.; Wendt, H.R., Electronic absorption spectra of organic peroxyl radicals in the near infrared, J. Chem. Phys., 1976, 64, 8, 3488, https://doi.org/10.1063/1.432606 . [all data]

Pushkarsky, Zalyubovsky, et al., 2000
Pushkarsky, M.B.; Zalyubovsky, S.J.; Miller, T.A., Detection and characterization of alkyl peroxy radicals using cavity ringdown spectroscopy, J. Chem. Phys., 2000, 112, 24, 10695, https://doi.org/10.1063/1.481705 . [all data]

Blanksby, Ramond, et al., 2001
Blanksby, S.J.; Ramond, T.M.; Davico, G.E.; Nimlos, M.R.; Kato, S.; Bierbaum, V.M.; Lineberger, W.C.; Ellison, G.B.; Okumura, M., Negative-Ion Photoelectron Spectroscopy, Gas-Phase Acidity, and Thermochemistry of the Peroxyl Radicals CH, J. Am. Chem. Soc., 2001, 123, 39, 9585, https://doi.org/10.1021/ja010942j . [all data]

Fu, Hu, et al., 2006
Fu, H.B.; Hu, Y.J.; Bernstein, E.R., Generation and detection of alkyl peroxy radicals in a supersonic jet expansion, J. Chem. Phys., 2006, 125, 1, 014310, https://doi.org/10.1063/1.2209680 . [all data]

Chung, Chang, et al., 2007
Chung, C.-Y.; Chang, C.-W.; Lee, Y.-P.; Liao, H.-Y.; Sharp, E.N.; Rupper, P.; Miller, T.A., Rovibronic bands of the A<--X transition of CH[sub 3]OO and CD[sub 3]OO detected with cavity ringdown absorption near 1.2--1.4 «mu»m, J. Chem. Phys., 2007, 127, 4, 044311, https://doi.org/10.1063/1.2747616 . [all data]

Huang, Chu, et al., 2007
Huang, D.-R.; Chu, L.-K.; Lee, Y.-P., Infrared absorption of gaseous CH[sub 3]OO detected with a step-scan Fourier-transform spectrometer, J. Chem. Phys., 2007, 127, 23, 234318, https://doi.org/10.1063/1.2807241 . [all data]

Morrison, Agarwal, et al., 2012
Morrison, A.M.; Agarwal, J.; Schaefer, H.F., III; Douberly, G.E., Infrared Laser Spectroscopy of the CH, J. Phys. Chem. A, 2012, 116, 22, 5299, https://doi.org/10.1021/jp3026368 . [all data]

Nandi, Blanksby, et al., 2002
Nandi, S.; Blanksby, S.J.; Zhang, X.; Nimlos, M.R.; Dayton, D.C.; Ellison, G.B., Polarized Infrared Absorption Spectrum of Matrix-Isolated Methylperoxyl Radicals, CH, J. Phys. Chem. A, 2002, 106, 33, 7547, https://doi.org/10.1021/jp0126816 . [all data]

Ase, Bock, et al., 1986
Ase, P.; Bock, W.; Snelson, A., Alkylperoxy and alkyl radicals. 1. Infrared spectra of CH3O2 and CH3O4CH3 and the ultraviolet photolysis of CH3O2 in argon + oxygen matrixes, J. Phys. Chem., 1986, 90, 10, 2099, https://doi.org/10.1021/j100401a024 . [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]

Hartmann, Karthauser, et al., 1990
Hartmann, D.; Karthauser, J.; Zellner, R., The 248-nm photofragmentation of the peroxymethyl radical, J. Phys. Chem., 1990, 94, 7, 2963, https://doi.org/10.1021/j100370a042 . [all data]

Wu, Dupre, et al., 2007
Wu, S.; Dupre, P.; Rupper, P.; MIlller, T.A., The vibrationless A<--X transition of the jet-cooled deuterated methyl peroxy radical CD[sub 3]O[sub 2] by cavity ringdown spectroscopy, J. Chem. Phys., 2007, 127, 22, 224305, https://doi.org/10.1063/1.2802202 . [all data]


Notes

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