F2C=C radical

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 compiled by: John E. Bartmess

View reactions leading to C2F2+ (ion structure unspecified)

Electron affinity determinations

EA (eV) Method Reference Comment
2.2550 ± 0.0060LPESGilles, Lineberger, et al., 1993 
2.20 ± 0.40EIAEHeni and Illenberger, 1986From F2C=CHF
1.70 ± 0.20EIAEHarland and Thynne, 1975From CF3CHO. G3MP2B3 calculations indicate an EA of ca. 2.3 eV, and HOF(A-) of -22 kcal/mol.

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
Tx = 43860 Ar Breidung, Burger, et al., 1997

State:   ?
 Energy 
 (cm-1) 		  Med.   Transition   λmin 
 (nm) 		  λmax 
 (nm) 		  References
Tx = 39370 Ar Breidung, Burger, et al., 1997

State:   a
 Energy 
 (cm-1) 		  Med.   Transition   λmin 
 (nm) 		  λmax 
 (nm) 		  References
To = 7455 ± 70 gas Gilles, Lineberger, et al., 1993

State:   X

Vib. 
sym. 		  No.   Approximate 
 type of mode 		  cm-1   Med.   Method   References
a1 1 C=C stretch 1670 ± 25 gas PE Gilles, Lineberger, et al., 1993
1 C=C stretch 1672 m Ar IR Breidung, Burger, et al., 1997
2 CF2 s-stretch 905 ± 25 gas PE Gilles, Lineberger, et al., 1993
2 CF2 s-stretch 918 m Ar IR Breidung, Burger, et al., 1997
3 CF2 scissors 510 ± 25 gas PE Gilles, Lineberger, et al., 1993
3 CF2 scissors 511 w Ar IR Breidung, Burger, et al., 1997
b1 4 OPLA 551 w Ar IR Breidung, Burger, et al., 1997
b2 5 CF2 a-stretch 1267 vs Ar IR Breidung, Burger, et al., 1997
6 CF2 rock 334 T Ar IR Breidung, Burger, et al., 1997

Additional references: Jacox, 1994, page 197; Jacox, 2003, page 232

Notes

wWeak
mMedium
vsVery strong
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

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

Gilles, Lineberger, et al., 1993
Gilles, M.K.; Lineberger, W.C.; Ervin, K.M., Photoelectron Spectroscopy of the Monofluorovinylidene and Difluorovinylidene Anions: The Monofluorovinylidene-Fluoroacetylene Rearrangement, J. Am. Chem. Soc., 1993, 115, 3, 1031, https://doi.org/10.1021/ja00056a030 . [all data]

Heni and Illenberger, 1986
Heni, M.; Illenberger, E., The Unimolecular Decompositions of the Fluoroethylene Radical Anions formed by Electron Attachment, J. Electron Spectros. Rel. Phenom., 1986, 41, 2, 453, https://doi.org/10.1016/0368-2048(86)85022-8 . [all data]

Harland and Thynne, 1975
Harland, P.W.; Thynne, J.C.J., Dissociative eElectron cCapture in tTrifluoroacetaldehyde, pentafluoropropionaldehyde, and heptafluorobutyraldehyde, Int. J. Mass Spectrom. Ion Phys., 1975, 18, 73. [all data]

Breidung, Burger, et al., 1997
Breidung, J.; Burger, H.; Kotting, C.; Kopitzky, R.; Sander, W.; Senzlober, M., et al., Difluorvinyliden, F2C«63742»C:, Angew. Chem., 1997, 109, 18, 2072, https://doi.org/10.1002/ange.19971091817 . [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]

Notes

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