Cyclopropane
- Formula: C3H6
- Molecular weight: 42.0797
- IUPAC Standard InChIKey: LVZWSLJZHVFIQJ-UHFFFAOYSA-N
- CAS Registry Number: 75-19-4
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Other names: Trimethylene; Trimethylene (cyclic); UN 1027; Cyclopropnane
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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:
HL - Edward P. Hunter and Sharon G. Lias
L - Sharon G. Lias
Data compiled as indicated in comments:
B - John E. Bartmess
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 C3H6+ (ion structure unspecified)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
IE (evaluated) | 9.86 ± 0.04 | eV | N/A | N/A | L |
Quantity | Value | Units | Method | Reference | Comment |
Proton affinity (review) | 750.3 | kJ/mol | N/A | Hunter and Lias, 1998 | HL |
Quantity | Value | Units | Method | Reference | Comment |
Gas basicity | 722.2 | kJ/mol | N/A | Hunter and Lias, 1998 | HL |
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
9.90 | PI | Traeger, 1984 | LBLHLM |
9.86 | EQ | Lias and Buckley, 1984 | LBLHLM |
10.60 | PE | Kimura, Katsumata, et al., 1981 | LLK |
9.8 ± 0.1 | PE | Bieri, Burger, et al., 1977 | LLK |
10.3 ± 0.1 | EI | Rothgery, Holt, et al., 1975 | LLK |
9.91 ± 0.03 | PI | Krassig, Reinke, et al., 1974 | LLK |
≤9.93 | EI | Lossing, 1972 | LLK |
≤9.8 | PE | Basch, Robin, et al., 1969 | RDSH |
10.1 | CI | Cermak, 1968 | RDSH |
10.06 ± 0.03 | PI | Watanabe, Nakayama, et al., 1962 | RDSH |
10.54 | PE | Plemenkov, Villem, et al., 1981 | Vertical value; LLK |
10.6 ± 0.1 | PE | Bieri, Burger, et al., 1977 | Vertical value; LLK |
Appearance energy determinations
Ion | AE (eV) | Other Products | Method | Reference | Comment |
---|---|---|---|---|---|
CH2+ | 19.3 | C2H4 | EI | Haney and Franklin, 1968 | RDSH |
C2H2+ | 12.71 ± 0.06 | CH4 | PI | Krassig, Reinke, et al., 1974 | LLK |
C2H2+ | 13.1 | CH4 | EI | Haney and Franklin, 1968 | RDSH |
C2H3+ | 12.64 ± 0.05 | CH3 | PI | Krassig, Reinke, et al., 1974 | LLK |
C2H3+ | 13.4 | CH3 | EI | Haney and Franklin, 1968 | RDSH |
C2H3+ | 13.3 ± 0.2 | CH3 | EI | Harrison and Tait, 1962 | RDSH |
C3H+ | 19.7 ± 0.5 | 2H2+H | EI | Harrison and Tait, 1962 | RDSH |
C3H3+ | 12.1 ± 0.1 | H2+H(-) | PI | Krassig, Reinke, et al., 1974 | LLK |
C3H3+ | 12.9 ± 0.1 | H2+H | PI | Krassig, Reinke, et al., 1974 | LLK |
C3H3+ | 13.7 ± 0.1 | H2+H | EI | Harrison and Tait, 1962 | RDSH |
C3H4+ | 11.64 ± 0.15 | H2 | PI | Krassig, Reinke, et al., 1974 | LLK |
C3H4+ | 11.6 ± 0.1 | H2 | EI | Harrison and Tait, 1962 | RDSH |
C3H5+ | 11.43 | H | PI | Traeger, 1984 | LBLHLM |
C3H5+ | 11.47 | H | PI | Buttrill, Williamson, et al., 1975 | LLK |
C3H5+ | 10.74 ± 0.09 | H(-) | PI | Krassig, Reinke, et al., 1974 | LLK |
C3H5+ | 11.44 ± 0.05 | H | PI | Krassig, Reinke, et al., 1974 | LLK |
C3H5+ | 11.49 | H | EI | Lossing, 1972 | LLK |
De-protonation reactions
C3H5- + =
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1716. ± 10. | kJ/mol | AVG | N/A | Average of 5 out of 7 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 1676. ± 10. | kJ/mol | AVG | N/A | Average of 3 out of 6 values; Individual data points |
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.
Hunter and Lias, 1998
Hunter, E.P.; Lias, S.G.,
Evaluated Gas Phase Basicities and Proton Affinities of Molecules: An Update,
J. Phys. Chem. Ref. Data, 1998, 27, 3, 413-656, https://doi.org/10.1063/1.556018
. [all data]
Traeger, 1984
Traeger, J.C.,
A study of the allyl cation thermochemistry by photoionization mass spectrometry,
Int. J. Mass Spectrom. Ion Processes, 1984, 58, 259. [all data]
Lias and Buckley, 1984
Lias, S.G.; Buckley, T.J.,
Structures and reactions of C3H6+ ions generated in cyclopropane,
Int. J. Mass Spectrom. Ion Processes, 1984, 56, 123. [all data]
Kimura, Katsumata, et al., 1981
Kimura, K.; Katsumata, S.; Achiba, Y.; Yamazaki, T.; Iwata, S.,
Ionization energies, Ab initio assignments, and valence electronic structure for 200 molecules
in Handbook of HeI Photoelectron Spectra of Fundamental Organic Compounds, Japan Scientific Soc. Press, Tokyo, 1981. [all data]
Bieri, Burger, et al., 1977
Bieri, G.; Burger, F.; Heilbronner, E.; Maier, J.P.,
Valence ionization enrgies of hydrocarbons,
Helv. Chim. Acta, 1977, 60, 2213. [all data]
Rothgery, Holt, et al., 1975
Rothgery, E.F.; Holt, J.; McGee, H.A., Jr.,
Cryochemical synthesis and molecular energetics of cyclopropanone and some related compounds,
J. Am. Chem. Soc., 1975, 97, 4971. [all data]
Krassig, Reinke, et al., 1974
Krassig, R.; Reinke, D.; Baumgartel, H.,
Photo-reaktionen kleiner organischer molekule II. Die photoionenspektren der Isomeren propylen-cyclopropan und acetaldehyd-athylenoxyd,
Ber. Bunsen-Ges. Phys. Chem., 1974, 78, 425. [all data]
Lossing, 1972
Lossing, F.P.,
Free radicals by mass spectrometry. XLV. Ionization potentials and heats of formation of C3H3, C3H5, and C4H7 radicals and ions,
Can. J. Chem., 1972, 50, 3973. [all data]
Basch, Robin, et al., 1969
Basch, H.; Robin, M.B.; Kuebler, N.A.; Baker, C.; Turner, D.W.,
Optical and photoelectron spectra of small rings. III. The saturated three-membered rings,
J. Chem. Phys., 1969, 51, 52. [all data]
Cermak, 1968
Cermak, V.,
Penning ionization electron spectroscopy. I. Determination of ionization potentials of polyatomic molecules,
Collection Czech. Chem. Commun., 1968, 33, 2739. [all data]
Watanabe, Nakayama, et al., 1962
Watanabe, K.; Nakayama, T.; Mottl, J.,
Ionization potentials of some molecules,
J. Quant. Spectry. Radiative Transfer, 1962, 2, 369. [all data]
Plemenkov, Villem, et al., 1981
Plemenkov, V.V.; Villem, Y.Y.; Villem, N.V.; Bolesov, I.G.; Surmina, L.S.; Yakushkina, N.I.; Formanovskii, A.A.,
Photoelectron spectra of polyalkylcyclopropenes and polyalkylcyclopropanes,
Zh. Obshch. Khim., 1981, 51, 2076. [all data]
Haney and Franklin, 1968
Haney, M.A.; Franklin, J.L.,
Correlation of excess energies of electron-impact dissociations with the translational energies of the products,
J.Chem. Phys., 1968, 48, 4093. [all data]
Harrison and Tait, 1962
Harrison, A.G.; Tait, J.M.S.,
Concurrent ion-molecule reactions leading to the same product ion,
Can. J. Chem., 1962, 40, 1986. [all data]
Buttrill, Williamson, et al., 1975
Buttrill, S.E., Jr.; Williamson, A.D.; LeBreton, P.,
Photoionization measurement of the heat of formation of allyl cations,
J. Chem. Phys., 1975, 62, 1586. [all data]
Notes
Go To: Top, Gas phase ion energetics data, References
- Symbols used in this document:
AE Appearance energy IE (evaluated) Recommended ionization energy ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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