Home Symbol which looks like a small house Up Solid circle with an upward pointer in it

Cyclobutadiene


Gas phase ion energetics data

Go To: Top, References, Notes

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:
LL - Sharon G. Lias and Joel F. Liebman
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron

View reactions leading to C4H4+ (ion structure unspecified)

Ionization energy determinations

IE (eV) Method Reference Comment
8.16 ± 0.03PEKohn and Chen, 1993LL
9.55EILi and McGee, 1969RDSH
8.2EIHedaya, Miller, et al., 1969RDSH
8.5DERDewar and Worley, 1969RDSH
8.24PEKreile, Munzel, et al., 1986Vertical value; LBLHLM

References

Go To: Top, Gas phase ion energetics data, Notes

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

Kohn and Chen, 1993
Kohn, D.W.; Chen, P., Vibrational structure in the photoelectron spectrum of cyclobutadiene as a probe of structure, J. Am. Chem. Soc., 1993, 115, 2844. [all data]

Li and McGee, 1969
Li, P.H.; McGee, H.A., Jr., Mass spectrum and ionization potential of condensed cyclobutadiene, Chem. Commun., 1969, 592. [all data]

Hedaya, Miller, et al., 1969
Hedaya, E.; Miller, R.D.; McNeil, D.W.; D'Angelo, P.F.; Schissel, P., Flash vacuum pyrolysis. V. Cyclobutadiene, J. Am. Chem. Soc., 1969, 91, 1875. [all data]

Dewar and Worley, 1969
Dewar, M.J.S.; Worley, S.D., Photoelectron spectra of molecules. I. Ionization potentials of some organic molecules and their interpretation, J. Chem. Phys., 1969, 50, 654. [all data]

Kreile, Munzel, et al., 1986
Kreile, J.; Munzel, N.; Schweig, A.; Specht, H., UV Photoelectron spectrum of cyclobutadiene. Free cyclobutadiene stable up to high temperatures, Chem. Phys. Lett., 1986, 124, 140. [all data]


Notes

Go To: Top, Gas phase ion energetics data, References