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Methyl radical

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Gas phase thermochemistry data

Go To: Top, 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.

Quantity Value Units Method Reference Comment
Deltafgas34.821kcal/molReviewChase, 1998Data last reviewed in June, 1969
Deltafgas35.1 ± 0.2kcal/molN/ATsang, 1996 
Quantity Value Units Method Reference Comment
gas,1 bar46.408cal/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 (cal/mol*K)
    H° = standard enthalpy (kcal/mol)
    S° = standard entropy (cal/mol*K)
    t = temperature (K) / 1000.

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Temperature (K) 298. - 1400.1400. - 6000.
A 6.72511016.05660
B 8.7828301.875341
C -1.039011-0.344383
D -0.3813750.022152
E 0.000444-4.221160
F 32.4359022.10110
G 51.9793056.38200
H 34.8201034.82010
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, 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
Deltar57.3 ± 3.0kcal/molCIDTFisher, Schultz, et al., 1989 
Deltar56.9 ± 1.6kcal/molCIDTFisher, Schultz, et al., 1989 
Deltar57.9 ± 2.4kcal/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
Deltar45.1 ± 3.0kcal/molCIDTFisher, Sunderlin, et al., 1989 
Deltar45.0 ± 2.4kcal/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
Deltar48.8 ± 3.0kcal/molCIDTFisher, Sunderlin, et al., 1989 
Deltar49.1 ± 3.5kcal/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
Deltar122.7 ± 6.0kcal/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
Deltar15.9 ± 1.4kcal/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
Deltar29. ± 12.kcal/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
Deltar98.7 ± 1.4kcal/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
Deltar55.1 ± 3.5kcal/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
Deltar59.5 ± 1.1kcal/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
Deltar45.4 ± 4.8kcal/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
Deltar29.7 ± 1.7kcal/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
Deltar30.2 ± 2.3kcal/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
Deltar51.5 ± 3.9kcal/molCIDTGeorgiadis and Armentrout, 1989, 2 

References

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


Notes

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