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Methyl radical

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Gas phase thermochemistry data

Go To: Top, Reaction thermochemistry data, Vibrational and/or electronic energy levels, References, Notes

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

Quantity Value Units Method Reference Comment
Deltafgas145.69kJ/molReviewChase, 1998Data last reviewed in June, 1969
Deltafgas147. ± 1.kJ/molN/ATsang, 1996 
Quantity Value Units Method Reference Comment
gas,1 bar194.17J/mol*KReviewChase, 1998Data last reviewed in June, 1969

Gas Phase Heat Capacity (Shomate Equation)

Cp° = A + B*t + C*t2 + D*t3 + E/t2
H° − H°298.15= A*t + B*t2/2 + C*t3/3 + D*t4/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 − E/(2*t2) + G
    Cp = heat capacity (J/mol*K)
    H° = standard enthalpy (kJ/mol)
    S° = standard entropy (J/mol*K)
    t = temperature (K) / 1000.

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View table.

Temperature (K) 298. - 1400.1400. - 6000.
A 28.1378667.18081
B 36.747367.846423
C -4.347218-1.440899
D -1.5956730.092685
E 0.001860-17.66133
F 135.711892.47100
G 217.4814235.9023
H 145.6873145.6873
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in June, 1969 Data last reviewed in June, 1969

Reaction thermochemistry data

Go To: Top, Gas phase thermochemistry data, Vibrational and/or electronic energy levels, References, Notes

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

Data compiled by: Robert C. Dunbar

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.

Individual Reactions

Iron ion (1+) + Methyl radical = (Iron ion (1+) bullet Methyl radical)

By formula: Fe+ + CH3 = (Fe+ bullet CH3)

Quantity Value Units Method Reference Comment
Deltar240. ± 13.kJ/molCIDTFisher, Schultz, et al., 1989 
Deltar238. ± 6.7kJ/molCIDTFisher, Schultz, et al., 1989 
Deltar242. ± 10.kJ/molCIDTSchultz, Elkind, et al., 1988 

Nickel ion (1+) + Methyl radical = (Nickel ion (1+) bullet Methyl radical)

By formula: Ni+ + CH3 = (Ni+ bullet CH3)

Quantity Value Units Method Reference Comment
Deltar189. ± 13.kJ/molCIDTFisher, Sunderlin, et al., 1989 
Deltar188. ± 10.kJ/molCIDTGeorgiadis, Fisher, et al., 1989 

Cobalt ion (1+) + Methyl radical = (Cobalt ion (1+) bullet Methyl radical)

By formula: Co+ + CH3 = (Co+ bullet CH3)

Quantity Value Units Method Reference Comment
Deltar204. ± 13.kJ/molCIDTFisher, Sunderlin, et al., 1989 
Deltar205. ± 15.kJ/molCIDTGeorgiadis, Fisher, et al., 1989 

(Silicon ion (1+) bullet 2Methyl radical) + Methyl radical = (Silicon ion (1+) bullet 3Methyl radical)

By formula: (Si+ bullet 2CH3) + CH3 = (Si+ bullet 3CH3)

Quantity Value Units Method Reference Comment
Deltar513. ± 25.kJ/molCIDT,BIRDLin, Dunbar, et al., 1996 

(Silicon ion (1+) bullet 3Methyl radical) + Methyl radical = (Silicon ion (1+) bullet 4Methyl radical)

By formula: (Si+ bullet 3CH3) + CH3 = (Si+ bullet 4CH3)

Quantity Value Units Method Reference Comment
Deltar66.5 ± 5.9kJ/molCIDT,BIRDLin, Dunbar, et al., 1996 

(Silicon ion (1+) bullet Methyl radical) + Methyl radical = (Silicon ion (1+) bullet 2Methyl radical)

By formula: (Si+ bullet CH3) + CH3 = (Si+ bullet 2CH3)

Quantity Value Units Method Reference Comment
Deltar123. ± 50.kJ/molCIDT,BIRDLin, Dunbar, et al., 1996 

Silicon ion (1+) + Methyl radical = (Silicon ion (1+) bullet Methyl radical)

By formula: Si+ + CH3 = (Si+ bullet CH3)

Quantity Value Units Method Reference Comment
Deltar413. ± 5.9kJ/molCIDT,BIRDLin, Dunbar, et al., 1996 

Lanthanum ion (1+) + Methyl radical = (Lanthanum ion (1+) bullet Methyl radical)

By formula: La+ + CH3 = (La+ bullet CH3)

Quantity Value Units Method Reference Comment
Deltar231. ± 15.kJ/molCIDTSunderlin and Armentrout, 1989 

Yttrium ion (1+) + Methyl radical = (Yttrium ion (1+) bullet Methyl radical)

By formula: Y+ + CH3 = (Y+ bullet CH3)

Quantity Value Units Method Reference Comment
Deltar249. ± 4.6kJ/molCIDTSunderlin and Armentrout, 1989 

Lutetium ion (1+) + Methyl radical = (Lutetium ion (1+) bullet Methyl radical)

By formula: Lu+ + CH3 = (Lu+ bullet CH3)

Quantity Value Units Method Reference Comment
Deltar190. ± 20.kJ/molCIDTSunderlin and Armentrout, 1989 

Copper ion (1+) + Methyl radical = (Copper ion (1+) bullet Methyl radical)

By formula: Cu+ + CH3 = (Cu+ bullet CH3)

Quantity Value Units Method Reference Comment
Deltar124. ± 7.1kJ/molCIDTGeorgiadis, Fisher, et al., 1989 

Chromium ion (1+) + Methyl radical = (Chromium ion (1+) bullet Methyl radical)

By formula: Cr+ + CH3 = (Cr+ bullet CH3)

Quantity Value Units Method Reference Comment
Deltar126. ± 9.6kJ/molCIDTGeorgiadis and Armentrout, 1989 

Manganese ion (1+) + Methyl radical = (Manganese ion (1+) bullet Methyl radical)

By formula: Mn+ + CH3 = (Mn+ bullet CH3)

Quantity Value Units Method Reference Comment
Deltar215. ± 16.kJ/molCIDTGeorgiadis and Armentrout, 1989, 2 

Vibrational and/or electronic energy levels

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, References, Notes

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:   4f 2E'?


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

To = 72508 gas Hudgens, DiGiuseppe, et al., 1983

State:   4p 2A2


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

To = 69853.44 ± 0.13 gas Black and Powis, 1988

State:   3d 2A1'


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

To = 66805 gas 3d2A1'-X 147 150 Herzberg and Shoosmith, 1956
Herzberg, 1961
Tx 3d2A1'-X 150 151 Milligan and Jacox, 1967

State:   3d 2E


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

To = 66536 gas 3d2E''-X 144 150 Herzberg and Shoosmith, 1956
Herzberg, 1961
DiGiuseppe, Hudgens, et al., 1982


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

a2 2 OPLA 1372 H gas AB MPI Herzberg, 1961
DiGiuseppe, Hudgens, et al., 1982

State:   3p 2A2


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

To = 59972 gas Hudgens, DiGiuseppe, et al., 1983
Heinze, Heberle, et al., 1994


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

a1' 1 CH stretch 2931 gas MPI Hudgens, DiGiuseppe, et al., 1983
Zhang, Zhang, et al., 2005
a2 2 OPLA 1323 gas MPI Hudgens, DiGiuseppe, et al., 1983
Zhang, Zhang, et al., 2005
e' 3 CH stretch 3087 gas MPI Zhang, Zhang, et al., 2005
Fu, Hu, et al., 2005
4 Deformation 1428 T gas MPI Zhang, Zhang, et al., 2005

State:   3s 2A1'


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

To = 46239 gas 3s2A1'-X 216 Herzberg and Shoosmith, 1956
Herzberg, 1961
Callear and Metcalfe, 1976
Westre, Gansberg, et al., 1992
Settersten, Farrow, et al., 2003


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

a1' 1 CH stretch 2040 T gas Ra Westre, Gansberg, et al., 1992

State:   X


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

a1' 1 CH stretch 3004.43 ± 0.02 gas CARS Ra Holt, McCurdy, et al., 1984
Kelly and Westre, 1988
Triggs, Zahedi, et al., 1992
Zahedi, Harrison, et al., 1994
Hadrich, Hefter, et al., 1996
a2 2 OPLA 606.453 gas IR DL Tan, Winer, et al., 1972
Yamada, Hirota, et al., 1981
Wormhoudt and McCurdy, 1989
Stancu, Ropcke, et al., 2005
2 OPLA 617 vs Ne IR Snelson, 1970
2 OPLA 603 Ar IR Milligan and Jacox, 1967
Jacox, 1977
2 OPLA 624.0 p-H2 IR Lee and Lee, 2011
2 OPLA 611 N2 IR Milligan and Jacox, 1967
e' 3 CH stretch 3160.821 gas LD CC Amano, Bernath, et al., 1982
Tanarro, Sanz, et al., 1994
Tanarro, Sanz, et al., 1994, 2
Bethardy and Macdonald, 1995
Davis, Anderson, et al., 1997
3 CH stretch 3160.821 gas CR IR Scherer, Aniolek, et al., 1997
Kawaguchi, 2001
3 CH stretch 3162 w m Ne IR Snelson, 1970
3 CH stretch 3150 Ar IR Pacansky and Bargon, 1975
3 CH stretch 3171.4 H2 IR Momose, Miki, et al., 1995
Tam, Macler, et al., 1997
Hoshina, Fushitani, et al., 2011
3 CH stretch 3170.6 H2 IR Momose, Miki, et al., 1995
Tam, Macler, et al., 1997
Hoshina, Fushitani, et al., 2011
4 Deformation 1396 w Ne IR Snelson, 1970
4 Deformation 1398 Ar IR Jacox, 1977
4 Deformation 1402.7 H2 IR Momose, Miki, et al., 1995
Tam, Macler, et al., 1997
Hoshina, Fushitani, et al., 2011
4 Deformation 1401.6 H2 IR Momose, Miki, et al., 1995
Tam, Macler, et al., 1997
Hoshina, Fushitani, et al., 2011

Additional references: Jacox, 1994, page 125; Jacox, 1998, page 214; Jacox, 2003, page 156; Frye, Sears, et al., 1988; Parker, Wang, et al., 1989; Sears, Frye, et al., 1989; Westre and Kelly, 1989; Miller, Burton, et al., 1989; Fawzy, Sears, et al., 1990; Rudolph, Hall, et al., 1996

Notes

wWeak
mMedium
vsVery strong
H(1/2)(2nu)
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.

References

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, 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.

Chase, 1998
Chase, M.W., Jr., NIST-JANAF Themochemical Tables, Fourth Edition, J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]

Tsang, 1996
Tsang, W., Heats of Formation of Organic Free Radicals by Kinetic Methods in Energetics of Organic Free Radicals, Martinho Simoes, J.A.; Greenberg, A.; Liebman, J.F., eds., Blackie Academic and Professional, London, 1996, 22-58. [all data]

Fisher, Schultz, et al., 1989
Fisher, E.R.; Schultz, r.H.; Armentrout, P.B., Guided Ion Beam Studies of the State - Specific Reactions of Fe+(6D,4F) with CH3X (X = Cl, Br, I), J. Phys. Chem., 1989, 93, 21, 7382, https://doi.org/10.1021/j100358a027 . [all data]

Schultz, Elkind, et al., 1988
Schultz, R.H.; Elkind, J.L.; Armentrout, P.B., Electronic Effects in C-H and C-C Bond Activation: State-Specific Reactions of Fe+(6D,4F) with Methane, Ethane and Propane, J. Am. Chem. Soc., 1988, 110, 2, 411, https://doi.org/10.1021/ja00210a017 . [all data]

Fisher, Sunderlin, et al., 1989
Fisher, E.R.; Sunderlin, L.S.; Armentrout, P.B., Guided Ion Beam Studies of the Reactions of CO+ and Ni+ with CH3X (X=Cl, Br, I). Implications for the Metal-Methyl Ion Bond Energies, J. Phys. Chem., 1989, 93, 21, 7375, https://doi.org/10.1021/j100358a026 . [all data]

Georgiadis, Fisher, et al., 1989
Georgiadis, R.; Fisher, E.R.; Armentrout, P.B., Neutral and Ionic Metal-Hydrogen and Metal-Carbon Bond Energies: Reactions of Co+, Ni+, and Cu+ with Ethane, Propane, Methylpropane, and Dimethylpropane, J. Am. Chem. Soc., 1989, 111, 12, 4251, https://doi.org/10.1021/ja00194a016 . [all data]

Lin, Dunbar, et al., 1996
Lin, C.-Y.; Dunbar, R.C.; Haynes, C.L.; Armentrout, P.B.; Tonner, D.S.; McMahon, T.J., The Dissociation Thermochemistry of Tetramethylsilane Ion. Comparative Determination by Thermal Dissociation and Threshold Collisional Dissociation, J. Phys. Chem., 1996, 100, 50, 19659, https://doi.org/10.1021/jp962523s . [all data]

Sunderlin and Armentrout, 1989
Sunderlin, L.S.; Armentrout, P.B., Periodic Trends in Chemical Reactivity: Reactions of Sc+, Y+, La+, and Lu+ with Methane and Ethane, J. Am. Chem. Soc., 1989, 111, 11, 3845, https://doi.org/10.1021/ja00193a015 . [all data]

Georgiadis and Armentrout, 1989
Georgiadis, R.; Armentrout, P.B., Reactions of Ground State Cr+ with C2H6, C2H4, cyclo-C3H6, and cyclo-C2H4O: Bond Energies for CrCHn+ (n= 1-3), Int. J. Mass Spectrom. Ion Proc., 1989, 89, 2-3, 227, https://doi.org/10.1016/0168-1176(89)83062-9 . [all data]

Georgiadis and Armentrout, 1989, 2
Georgiadis, R.; Armentrout, P.B., Translational and Electronic Energy Dependence of the Reaction of Mn+ with Ethane, Int. J. Mass Spectrom. Ion Proc., 1989, 91, 2, 123, https://doi.org/10.1016/0168-1176(89)83003-4 . [all data]

Hudgens, DiGiuseppe, et al., 1983
Hudgens, J.W.; DiGiuseppe, T.G.; Lin, M.C., Two photon resonance enhanced multiphoton ionization spectroscopy and state assignments of the methyl radical, J. Chem. Phys., 1983, 79, 2, 571, https://doi.org/10.1063/1.445857 . [all data]

Black and Powis, 1988
Black, J.F.; Powis, I., Rotational structure and predissociation dynamics of the methyl 4pz(v=0) Rydberg state investigated by resonance enhanced multiphoton ionization spectroscopy, J. Chem. Phys., 1988, 89, 7, 3986, https://doi.org/10.1063/1.454832 . [all data]

Herzberg and Shoosmith, 1956
Herzberg, G.; Shoosmith, J., Absorption spectrum of free CH3 and CD3 radicals, Can. J. Phys., 1956, 34, 523. [all data]

Herzberg, 1961
Herzberg, G., The Bakerian Lecture. The Spectra and Structures of Free Methyl and Free Methylene, Proc. Roy. Soc. (London) A262, 1961, 262, 1310, 291, https://doi.org/10.1098/rspa.1961.0120 . [all data]

Milligan and Jacox, 1967
Milligan, D.E.; Jacox, M.E., Infrared and Ultraviolet Spectroscopic Study of the Products of the Vacuum-Ultraviolet Photolysis of Methane in Ar and N2 Matrices. The Infrared Spectrum of the Free Radical CH3, J. Chem. Phys., 1967, 47, 12, 5146, https://doi.org/10.1063/1.1701772 . [all data]

DiGiuseppe, Hudgens, et al., 1982
DiGiuseppe, T.G.; Hudgens, J.W.; Lin, M.C., Multiphoton ionization of methyl radicals in the gas phase, J. Phys. Chem., 1982, 86, 1, 36, https://doi.org/10.1021/j100390a008 . [all data]

Heinze, Heberle, et al., 1994
Heinze, J.; Heberle, N.; Kohse-Hoinghaus, K., The CH3 3pz2A2´´ <-- X 2A2´´ 000 band at temperatures up to 1700 K investigated by REMPI spectroscopy, Chem. Phys. Lett., 1994, 223, 4, 305, https://doi.org/10.1016/0009-2614(94)00469-2 . [all data]

Zhang, Zhang, et al., 2005
Zhang, B.; Zhang, J.; Liu, K., Imaging the "missing" bands in the resonance-enhanced multiphoton ionization detection of methyl radical, J. Chem. Phys., 2005, 122, 10, 104310, https://doi.org/10.1063/1.1859277 . [all data]

Fu, Hu, et al., 2005
Fu, H.B.; Hu, Y.J.; Bernstein, E.R., IR/UV double resonant spectroscopy of the methyl radical: Determination of «nu»[sub 3] in the 3p[sub z] Rydberg state, J. Chem. Phys., 2005, 123, 23, 234307, https://doi.org/10.1063/1.2135772 . [all data]

Callear and Metcalfe, 1976
Callear, A.B.; Metcalfe, M.P., Oscillator strengths of the bands of the B2 A´1---X2 A´´2 system of CD3 and a spectroscopic measurement of the recombination rate comparison with CH3, Chem. Phys., 1976, 14, 2, 275, https://doi.org/10.1016/0301-0104(76)80045-6 . [all data]

Westre, Gansberg, et al., 1992
Westre, S.G.; Gansberg, T.E.; Kelly, P.B.; Ziegler, L.D., Structure and dynamics of higher vibronic levels in the methyl radical Rydberg 3s state, J. Phys. Chem., 1992, 96, 9, 3610, https://doi.org/10.1021/j100188a012 . [all data]

Settersten, Farrow, et al., 2003
Settersten, T.B.; Farrow, R.L.; Gray, J.A., Coherent infrared--ultraviolet double-resonance spectroscopy of CH3, Chem. Phys. Lett., 2003, 370, 1-2, 204, https://doi.org/10.1016/S0009-2614(03)00062-9 . [all data]

Holt, McCurdy, et al., 1984
Holt, P.L.; McCurdy, K.E.; Weisman, R.B.; Adams, J.S.; Engel, P.S., Transient CARS spectroscopy of the «nu»1 band of methyl radical, J. Chem. Phys., 1984, 81, 7, 3349, https://doi.org/10.1063/1.448000 . [all data]

Kelly and Westre, 1988
Kelly, P.B.; Westre, S.G., Resonance Raman spectroscopy of the methyl radical, Chem. Phys. Lett., 1988, 151, 3, 253, https://doi.org/10.1016/0009-2614(88)85284-9 . [all data]

Triggs, Zahedi, et al., 1992
Triggs, N.E.; Zahedi, M.; Nibler, J.W.; DeBarber, P.; Valentini, J.J., High resolution study of the «nu»1 vibration of CH3 by coherent Raman photofragment spectroscopy, J. Chem. Phys., 1992, 96, 3, 1822, https://doi.org/10.1063/1.462083 . [all data]

Zahedi, Harrison, et al., 1994
Zahedi, M.; Harrison, J.A.; Nibler, J.W., 266 nm CH3I photodissociation: CH3 spectra and population distributions by coherent Raman spectroscopy, J. Chem. Phys., 1994, 100, 6, 4043, https://doi.org/10.1063/1.466342 . [all data]

Hadrich, Hefter, et al., 1996
Hadrich, S.; Hefter, S.; Pfelzer, B.; Doerk, T.; Jauernik, P.; Uhlenbusch, J., Determination of the absolute Raman cross section of methyl, Chem. Phys. Lett., 1996, 256, 1-2, 83, https://doi.org/10.1016/0009-2614(96)00411-3 . [all data]

Tan, Winer, et al., 1972
Tan, L.Y.; Winer, A.M.; Pimentel, G.C., Infrared Spectrum of Gaseous Methyl Radical by Rapid Scan Spectroscopy, J. Chem. Phys., 1972, 57, 9, 4028, https://doi.org/10.1063/1.1678876 . [all data]

Yamada, Hirota, et al., 1981
Yamada, C.; Hirota, E.; Kawaguchi, K., Diode laser study of the «nu»2 band of the methyl radical, J. Chem. Phys., 1981, 75, 11, 5256, https://doi.org/10.1063/1.441991 . [all data]

Wormhoudt and McCurdy, 1989
Wormhoudt, J.; McCurdy, K.E., A measurement of the strength of the «nu»2 band of CH3, Chem. Phys. Lett., 1989, 156, 1, 47, https://doi.org/10.1016/0009-2614(89)87078-2 . [all data]

Stancu, Ropcke, et al., 2005
Stancu, G.D.; Ropcke, J.; Davies, P.B., Line strengths and transition dipole moment of the «nu»[sub 2] fundamental band of the methyl radical, J. Chem. Phys., 2005, 122, 1, 014306, https://doi.org/10.1063/1.1812755 . [all data]

Snelson, 1970
Snelson, A., Infrared matrix isolation spectrum of the methyl radical produced by pyrolysis of methyl iodide and dimethyl mercury, J. Phys. Chem., 1970, 74, 3, 537, https://doi.org/10.1021/j100698a011 . [all data]

Jacox, 1977
Jacox, M.E., Matrix isolation study of the infrared spectrum and structure of the CH3 free radical, J. Mol. Spectrosc., 1977, 66, 2, 272, https://doi.org/10.1016/0022-2852(77)90217-X . [all data]

Lee and Lee, 2011
Lee, Y.-F.; Lee, Y.-P., Infrared absorption of CH3SO2 observed upon irradiation of a p-H2 matrix containing CH3I and SO2, J. Chem. Phys., 2011, 1334, 12, 124314, https://doi.org/10.1063/1.3567117 . [all data]

Amano, Bernath, et al., 1982
Amano, T.; Bernath, P.F.; Yamada, C.; Endo, Y.; Hirota, E., Difference frequency laser spectroscopy of the «nu»3 band of the CH3 radical, J. Chem. Phys., 1982, 77, 11, 5284, https://doi.org/10.1063/1.443797 . [all data]

Tanarro, Sanz, et al., 1994
Tanarro, I.; Sanz, M.M.; Bermejo, D.; Domingo, C.; Santos, J., Double modulation-high resolution infrared spectroscopic technique: The «nu»3 band of the CH3 radical and excited states of CH4 in a hollow cathode discharge, J. Chem. Phys., 1994, 100, 1, 238, https://doi.org/10.1063/1.466991 . [all data]

Tanarro, Sanz, et al., 1994, 2
Tanarro, I.; Sanz, M.M.; Domingo, C.; Bermejo, D.; Santos, J.; Domenech, J.L., Transition dipole moment of the .nu.3 band of CH3, J. Phys. Chem., 1994, 98, 23, 5862, https://doi.org/10.1021/j100074a009 . [all data]

Bethardy and Macdonald, 1995
Bethardy, G.A.; Macdonald, R.G., Direct measurement of the transition dipole moment of the v3 asymmetric C--H stretching vibration of the CH3 radical, J. Chem. Phys., 1995, 103, 8, 2863, https://doi.org/10.1063/1.470499 . [all data]

Davis, Anderson, et al., 1997
Davis, S.; Anderson, D.T.; Duxbury, G.; Nesbitt, D.J., Jet-cooled molecular radicals in slit supersonic discharges: Sub-Doppler infrared studies of methyl radical, J. Chem. Phys., 1997, 107, 15, 5661, https://doi.org/10.1063/1.474259 . [all data]

Scherer, Aniolek, et al., 1997
Scherer, J.J.; Aniolek, K.W.; Cernansky, N.P.; Rakestraw, D.J., Determination of methyl radical concentrations in a methane/air flame by infrared cavity ringdown laser absorption spectroscopy, J. Chem. Phys., 1997, 107, 16, 6196, https://doi.org/10.1063/1.474284 . [all data]

Kawaguchi, 2001
Kawaguchi, K., High-resolution Fourier transform infrared spectra of the CH, Can. J. Phys., 2001, 79, 2-3, 449, https://doi.org/10.1139/p00-093 . [all data]

Pacansky and Bargon, 1975
Pacansky, J.; Bargon, J., Low temperature photochemical studies on acetyl benzoyl peroxide. Observation of methyl and phenyl radicals by matrix isolation infrared spectroscopy, J. Am. Chem. Soc., 1975, 97, 23, 6896, https://doi.org/10.1021/ja00856a066 . [all data]

Momose, Miki, et al., 1995
Momose, T.; Miki, M.; Uchida, M.; Shimizu, T.; Yoshizawa, I.; Shida, T., Infrared spectroscopic studies on photolysis of methyl iodide and its clusters in solid parahydrogen, J. Chem. Phys., 1995, 103, 4, 1400, https://doi.org/10.1063/1.469763 . [all data]

Tam, Macler, et al., 1997
Tam, S.; Macler, M.; Fajardo, M.E., Matrix isolation spectroscopy of laser ablated carbon species in Ne, D[sub 2], and H[sub 2] matrices, J. Chem. Phys., 1997, 106, 22, 8955, https://doi.org/10.1063/1.474028 . [all data]

Hoshina, Fushitani, et al., 2011
Hoshina, H.; Fushitani, M.; Momose, T., Infrared spectroscopy of rovibrational transitions of methyl radicals (CH3, CD3) in solid parahydrogen, J. Mol. Spectrosc., 2011, 268, 1-2, 164, https://doi.org/10.1016/j.jms.2011.04.014 . [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, 1998
Jacox, M.E., Vibrational and electronic energy levels of polyatomic transient molecules: supplement A, J. Phys. Chem. Ref. Data, 1998, 27, 2, 115-393, https://doi.org/10.1063/1.556017 . [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]

Frye, Sears, et al., 1988
Frye, J.M.; Sears, T.J.; Leitner, D., Diode laser spectroscopy of the «nu»2 band of CD3, J. Chem. Phys., 1988, 88, 9, 5300, https://doi.org/10.1063/1.454588 . [all data]

Parker, Wang, et al., 1989
Parker, D.H.; Wang, Z.W.; Janssen, M.H.M.; Chandler, D.W., Laser ionization spectroscopy of CD3 via the 3pz 2A'2 Rydberg state, J. Chem. Phys., 1989, 90, 1, 60, https://doi.org/10.1063/1.456466 . [all data]

Sears, Frye, et al., 1989
Sears, T.J.; Frye, J.M.; Spirko, V.; Kraemer, W.P., Extended measurements of the «nu»2 band of CD3 and the determination of the vibrational potential function for methyl, J. Chem. Phys., 1989, 90, 4, 2125, https://doi.org/10.1063/1.456006 . [all data]

Westre and Kelly, 1989
Westre, S.G.; Kelly, P.B., Examination of CD3 vibrational structure by resonance Raman spectroscopy, J. Chem. Phys., 1989, 90, 12, 6977, https://doi.org/10.1063/1.456273 . [all data]

Miller, Burton, et al., 1989
Miller, J.T.; Burton, K.A.; Weisman, R.B.; Wu, W.-X.; Engel, P.S., Cars spectroscopy of gas phase CD3, Chem. Phys. Lett., 1989, 158, 3-4, 179, https://doi.org/10.1016/0009-2614(89)87317-8 . [all data]

Fawzy, Sears, et al., 1990
Fawzy, W.M.; Sears, T.J.; Davies, P.B., Infrared diode laser spectroscopy of the «nu»3 fundamental of the CD3 radical, J. Chem. Phys., 1990, 92, 12, 7021, https://doi.org/10.1063/1.458242 . [all data]

Rudolph, Hall, et al., 1996
Rudolph, R.N.; Hall, G.E.; Sears, T.J., Measurement of the «nu»3 fundamental transition moment and vibrational relaxation rates of the CD3 radical, J. Chem. Phys., 1996, 105, 18, 7889, https://doi.org/10.1063/1.472704 . [all data]


Notes

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