CH3O2
- Formula: CH3O2
- Molecular weight: 47.0333
- CAS Registry Number: 2143-58-0
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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 | λmin (nm) |
λmax (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 | λmin (nm) |
λmax (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
Additional references: Jacox, 1994, page 321; Jacox, 2003, page 320; Hartmann, Karthauser, et al., 1990; Wu, Dupre, et al., 2007
Notes
w | Weak |
m | Medium |
s | Strong |
vs | Very strong |
T | Tentative assignment or approximate value |
o | Energy separation between the v = 0 levels of the excited and electronic ground states. |
x | Energy separation between the band maximum of the excited electronic state and the v = 0 level of the ground state. |
d | Photodissociation threshold |
References
Go To: Top, Vibrational and/or electronic energy levels, 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 μm,
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
Go To: Top, Vibrational and/or electronic energy levels, References
- Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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