Cyclopentene, 3-methyl-

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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 as indicated in comments:
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 C6H10+ (ion structure unspecified)

Ionization energy determinations

IE (eV) Method Reference Comment
8.95EILossing and Traeger, 1975LLK
8.95 ± 0.01PERang, Paldoia, et al., 1974LLK
8.99 ± 0.04EIWinters and Collins, 1969RDSH
8.98 ± 0.05PEMcAlduff, Caramella, et al., 1978Vertical value; LLK

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
C3H3+13.24 ± 0.32?EIWinters and Collins, 1969RDSH
C3H5+12.28 ± 0.17?EIWinters and Collins, 1969RDSH
C4H5+12.69 ± 0.20?EIWinters and Collins, 1969RDSH
C4H6+10.69 ± 0.07?EIWinters and Collins, 1969RDSH
C5H5+13.35 ± 0.05?EIWinters and Collins, 1969RDSH
C5H7+8.95CH3EILossing and Traeger, 1975, 2LLK
C5H7+10.03CH3EILossing and Traeger, 1975LLK
C5H7+9.67 ± 0.11CH3EIWinters and Collins, 1969RDSH
C5H7+10.52CH3EIPignataro, Cassuto, et al., 1967RDSH
C6H7+11.75 ± 0.04H2+HEIWinters and Collins, 1969RDSH
C6H9+10.35 ± 0.17HEIWinters and Collins, 1969RDSH


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

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]

Rang, Paldoia, et al., 1974
Rang, S.; Paldoia, P.; Talvari, A., Ionization potentials of unsaturated hydrocarbons. 2. Mono-substituted cyclopentenes and cyclohexenes, Eesti. NSV Tead. Akad. Toim., 1974, 354. [all data]

Winters and Collins, 1969
Winters, R.E.; Collins, J.H., Mass spectrometric studies of structural isomers. II.Mono- and bicyclic C6H10 molecules, Org. Mass Spectrom., 1969, 2, 299. [all data]

McAlduff, Caramella, et al., 1978
McAlduff, E.J.; Caramella, P.; Houk, K.N., Photoelectron spectra of 3-substituted cyclopentenes. Correlations between ionization potentials and cycloaddition regioselectivity, J. Am. Chem. Soc., 1978, 100, 105. [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]

Pignataro, Cassuto, et al., 1967
Pignataro, S.; Cassuto, A.; Lossing, F.P., Free radicals by mass spectrometry. XXXVI. Ionization potentials of conjugated and nonconjugated radicals, J. Am. Chem. Soc., 1967, 89, 3693. [all data]


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