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Iron, methylene-


Gas phase ion energetics 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 evaluated as indicated in comments:
HL - Edward P. Hunter and Sharon G. Lias

Data compiled as indicated in comments:
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard

Quantity Value Units Method Reference Comment
Proton affinity (review)937.7kJ/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity905.2kJ/molN/AHunter and Lias, 1998HL

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
CFe+2.9 ± 0.2H2PIHettich and Freiser, 1986LBLHLM
CHFe+3.5 ± 0.2HPIHettich and Freiser, 1986LBLHLM
Fe+3.5 ± 0.2CH2PIHettich and Freiser, 1986LBLHLM

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

Td = 28000 T Ar Chang, Hauge, et al., 1978

State:   X


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

a1 1 CH stretch 2941.6 m Ar IR Chang, Kafafi, et al., 1975
Chang, Hauge, et al., 1978
3 FeC stretch 623.9 vs Ar IR Chang, Kafafi, et al., 1975
Chang, Hauge, et al., 1978
b1 4 OPLA 700.3 s Ar IR Chang, Kafafi, et al., 1975
Chang, Hauge, et al., 1978
4 OPLA 697.4 Ar IR Chang, Kafafi, et al., 1975
Chang, Hauge, et al., 1978
b2 5 CH2 a-stretch 3011.5 Ar IR Chang, Hauge, et al., 1978
6 CH2 rock 452.0 Ar IR Chang, Hauge, et al., 1978

Additional references: Jacox, 1994, page 131

Notes

mMedium
sStrong
vsVery strong
TTentative assignment or approximate value
dPhotodissociation threshold

References

Go To: Top, Gas phase ion energetics 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.

Hunter and Lias, 1998
Hunter, E.P.; Lias, S.G., Evaluated Gas Phase Basicities and Proton Affinities of Molecules: An Update, J. Phys. Chem. Ref. Data, 1998, 27, 3, 413-656, https://doi.org/10.1063/1.556018 . [all data]

Hettich and Freiser, 1986
Hettich, R.L.; Freiser, B.S., Gas-phase photodissociation of FeCH2+ and CoCH2+: Determination of the carbide, carbyne, and carbene bond energies, J. Am. Chem. Soc., 1986, 108, 2537. [all data]

Chang, Hauge, et al., 1978
Chang, S.-C.; Hauge, R.H.; Kafafi, Z.H.; Margrave, J.L.; Billups, W.E., Characterization and novel low-temperature reactions of FeCH2 and N2FeCH2, J. Am. Chem. Soc., 1978, 110, 24, 7975, https://doi.org/10.1021/ja00232a004 . [all data]

Chang, Kafafi, et al., 1975
Chang, S-C.; Kafafi, Z.H.; Hauge, R.H.; Billups, W.E.; Margrave, J.L., Isolation and characterization of iron methylene (FeCH2) via FTIR matrix isolation, J. Am. Chem. Soc., 1975, 107, 5, 1447, https://doi.org/10.1021/ja00291a076 . [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]


Notes

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