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Methylene

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Reaction thermochemistry data

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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 as indicated in comments:
B - John E. Bartmess
RCD - 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

(CAS Reg. No. 60291-30-7 bullet 4294967295Methylene) + Methylene = CAS Reg. No. 60291-30-7

By formula: (CAS Reg. No. 60291-30-7 bullet 4294967295CH2) + CH2 = CAS Reg. No. 60291-30-7

Quantity Value Units Method Reference Comment
Deltar88.3 ± 6.7kJ/molCIDTPoutsma, Nash, et al., 1997gas phase; B
Deltar91. ± 13.kJ/molTherHierl, Henchman, et al., 1992gas phase; HO- + MeBr:6.0±2.3 kcal/mol endo. "Better than Ingemann and Nibbering, 19852" 2.0 kcal would not show barrier; B
Deltar102. ± 27.kJ/molTherIngemann and Nibbering, 1985, 2gas phase; B

(CAS Reg. No. 60291-29-4 bullet 4294967295Methylene) + Methylene = CAS Reg. No. 60291-29-4

By formula: (CAS Reg. No. 60291-29-4 bullet 4294967295CH2) + CH2 = CAS Reg. No. 60291-29-4

Quantity Value Units Method Reference Comment
Deltar119. ± 13.kJ/molN/AIngemann and Nibbering, 1985, 2gas phase; B
Deltar97. ± 12.kJ/molCIDTPoutsma, Nash, et al., 1997gas phase; B

CH- + Hydrogen cation = Methylene

By formula: CH- + H+ = CH2

Quantity Value Units Method Reference Comment
Deltar1615.2 ± 1.8kJ/molD-EAKasdan, Herbst, et al., 1975gas phase; B
Quantity Value Units Method Reference Comment
Deltar1586.9 ± 2.2kJ/molH-TSKasdan, Herbst, et al., 1975gas phase; B

(CH3- bullet 4294967295Methylene) + Methylene = CH3-

By formula: (CH3- bullet 4294967295CH2) + CH2 = CH3-

Quantity Value Units Method Reference Comment
Deltar397.4 ± 3.3kJ/molN/AEllison, Engelking, et al., 1978gas phase; B

Lanthanum ion (1+) + Methylene = (Lanthanum ion (1+) bullet Methylene)

By formula: La+ + CH2 = (La+ bullet CH2)

Quantity Value Units Method Reference Comment
Deltar411. ± 5.9kJ/molCIDTSunderlin and Armentrout, 1989RCD

Scandium ion (1+) + Methylene = (Scandium ion (1+) bullet Methylene)

By formula: Sc+ + CH2 = (Sc+ bullet CH2)

Quantity Value Units Method Reference Comment
Deltar411. ± 22.kJ/molCIDTSunderlin and Armentrout, 1989RCD

Yttrium ion (1+) + Methylene = (Yttrium ion (1+) bullet Methylene)

By formula: Y+ + CH2 = (Y+ bullet CH2)

Quantity Value Units Method Reference Comment
Deltar398. ± 13.kJ/molCIDTSunderlin and Armentrout, 1989RCD

Cobalt ion (1+) + Methylene = (Cobalt ion (1+) bullet Methylene)

By formula: Co+ + CH2 = (Co+ bullet CH2)

Quantity Value Units Method Reference Comment
Deltar318. ± 5.0kJ/molCIDTHaynes and Armentrout, 1994RCD

Chromium ion (1+) + Methylene = (Chromium ion (1+) bullet Methylene)

By formula: Cr+ + CH2 = (Cr+ bullet CH2)

Quantity Value Units Method Reference Comment
Deltar225. ± 7.9kJ/molCIDTGeorgiadis and Armentrout, 1989RCD

References

Go To: Top, Reaction thermochemistry data, Notes

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

Poutsma, Nash, et al., 1997
Poutsma, J.C.; Nash, J.J.; Paulino, J.A.; Squires, R.R., Absolute Heats of Formation of Phenylcarbene and Vinylcarbene, J. Am. Chem. Soc., 1997, 119, 20, 4686, https://doi.org/10.1021/ja963918s . [all data]

Hierl, Henchman, et al., 1992
Hierl, P.M.; Henchman, M.J.; Paulson, J.F., Threshold Energies for the Reactions HO- + MeX - MeOH + X- measured by Tandem Mass Spectrometry: Acidities of MeCl and MeBr, Int. J. Mass Spectrom. Ion Proc., 1992, 117, 475, https://doi.org/10.1016/0168-1176(92)80109-E . [all data]

Ingemann and Nibbering, 1985
Ingemann, S.; Nibbering, N.M.M., Gas phase chemistry of alpha-thio carbanions, Can. J. Chem., 1985, 62, 2273. [all data]

Ingemann and Nibbering, 1985, 2
Ingemann, S.; Nibbering, N.M.M., Gas-phase acidity of CH3X [X = P(CH3)2, SCH3, F, Cl, Br, I] compounds, J. Chem. Soc. Perkin Trans. 2, 1985, 837. [all data]

Kasdan, Herbst, et al., 1975
Kasdan, A.; Herbst, E.; Lineberger, W.C., Laser photoelectron spectrometry of CH2-, Chem. Phys. Lett., 1975, 31, 78. [all data]

Ellison, Engelking, et al., 1978
Ellison, G.B.; Engelking, P.C.; Lineberger, W.C., An experimental determination of the geometry and electron affinity of CH3, J. Am. Chem. Soc., 1978, 100, 2556. [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]

Haynes and Armentrout, 1994
Haynes, C.L.; Armentrout, P.B., Thermochemistry and Structures of CoC3H6+: Metallacyclic and Metal-Alkene Isomers, Organomettalics, 1994, 13, 9, 3480, https://doi.org/10.1021/om00021a022 . [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]


Notes

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