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

Spiropentane

Data at NIST subscription sites:

NIST subscription sites provide data under the NIST Standard Reference Data Program, but require an annual fee to access. The purpose of the fee is to recover costs associated with the development of data collections included in such sites. Your institution may already be a subscriber. Follow the links above to find out more about the data in these sites and their terms of usage.


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 evaluated as indicated in comments:
L - 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
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron

View reactions leading to C5H8+ (ion structure unspecified)

Quantity Value Units Method Reference Comment
IE (evaluated)9.26eVN/AN/AL

Ionization energy determinations

IE (eV) Method Reference Comment
9.26PEGleiter, Krennrich, et al., 1986LBLHLM
9.26EILossing and Traeger, 1975LLK
9.26EIHolmes, 1974LLK
9.37 ± 0.05EIPuttemans and Delvaux, 1973LLK
9.73PEGleiter, Krennrich, et al., 1986Vertical value; LBLHLM
9.45PEDewar and Worley, 1969Vertical value; RDSH

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
C3H3+13.46 ± 0.15C2H4+HEIPuttemans and Delvaux, 1973LLK
C3H4+11.17 ± 0.08C2H4EIPuttemans and Delvaux, 1973LLK
C4H5+10.20CH3EIHolmes, 1974LLK
C4H5+10.65 ± 0.08CH3EIPuttemans and Delvaux, 1973LLK
C5H7+9.26HEILossing and Traeger, 1975, 2LLK
C5H7+9.53HEILossing and Traeger, 1975LLK
C5H7+9.53 ± 0.03HEIHolmes, 1974LLK
C5H7+9.93 ± 0.10HEIPuttemans and Delvaux, 1973LLK

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.

Gleiter, Krennrich, et al., 1986
Gleiter, R.; Krennrich, G.; Brinker, U.H., Electronic structure of spiropentane and some derivatives, J. Org. Chem., 1986, 51, 2899. [all data]

Lossing and Traeger, 1975
Lossing, F.P.; Traeger, J.C., Stabilization in cyclopentadienyl, cyclopentenyl, and cyclopentyl cations, J. Am. Chem. Soc., 1975, 97, 1579. [all data]

Holmes, 1974
Holmes, J.L., The mass spectra of isomeric hydrocarbons - II: The C5H8 isomers, spiropentane, cyclopentene, 1,3-pentadiene and isoprene; the mechanisms and energetics of their fragmentations, Org. Mass Spectrom., 1974, 8, 247. [all data]

Puttemans and Delvaux, 1973
Puttemans, J.-P.; Delvaux, J.C., Ionisation et fragmentation d'isomeres C5H8 sous impact electronique. Spiropentane - methylenecyclobutane - isoprene, Ing. Chim. Brussell, 1973, 55(267-8), 7. [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]

Lossing and Traeger, 1975, 2
Lossing, F.P.; Traeger, J.C., Free radicals by mass spectrometry XLVI. Heats of formation of C5H7 and C5H9 radicals and cations., J. Am. Chem. Soc., 1975, 19, 9. [all data]


Notes

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