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cyclopentadienylide 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 C5H4+ (ion structure unspecified)

Electron affinity determinations

EA (eV) Method Reference Comment
1.752 ± 0.047LPDMcDonald, Bianchina, et al., 1991 

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:   X


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

1345 w N2 IR Baird, Dunkin, et al., 1981
1335 m N2 IR Baird, Dunkin, et al., 1981
1101 w N2 IR Baird, Dunkin, et al., 1981
1074 w N2 IR Baird, Dunkin, et al., 1981
922 w N2 IR Baird, Dunkin, et al., 1981
703 s N2 IR Baird, Dunkin, et al., 1981
577 w N2 IR Baird, Dunkin, et al., 1981

Additional references: Jacox, 1994, page 385

Notes

wWeak
mMedium
sStrong

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.

McDonald, Bianchina, et al., 1991
McDonald, R.N.; Bianchina, E.J.; Tung, C.C., Electron Photodetachment of Cyclopentadienylidene Anion Radical in a Flowing Afterglow Apparatus - EA and «DELTA»H(f)-Degrees of Cyclopentadienylide, J. Am. Chem. Soc., 1991, 113, 19, 7115, https://doi.org/10.1021/ja00019a005 . [all data]

Baird, Dunkin, et al., 1981
Baird, M.S.; Dunkin, I.R.; Hacker, N.; Poliakoff, M.; Turner, J.J., Cyclopentadienylidene. A matrix isolation study exploiting photolysis with unpolarized and plane-polarized light, J. Am. Chem. Soc, 1981, 103, 17, 5190, https://doi.org/10.1021/ja00407a040 . [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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