1,3-Pentadiene, 2-methyl-
- Formula: C6H10
- Molecular weight: 82.1436
- IUPAC Standard InChI: InChI=1S/C6H10/c1-4-5-6(2)3/h4-5H,2H2,1,3H3
- IUPAC Standard InChIKey: RCJMVGJKROQDCB-UHFFFAOYSA-N
- CAS Registry Number: 1118-58-7
- 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. - Stereoisomers:
- Other names: 1,3-Dimethyl-1,3-butadiene; 2-Methyl-1,3-pentadiene; 2,4-Dimethyl-1,3-butadiene; CH2=C(CH3)CH=CHCH3; 2-Methyl-1,3-pentadiene,c&t; 2-methylpenta-1,3-diene
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Reaction thermochemistry data
Go To: Top, Gas phase ion energetics data, Gas Chromatography, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.
Individual Reactions
=
By formula: C6H10 = C6H10
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -4.111 | kcal/mol | Eqk | Petrova-Kuminskaya, Roganov, et al., 1984 | gas phase; At 458 K, see Petrova-Kuminskaya, Roganov, et al., 1984, 2 |
Gas phase ion energetics data
Go To: Top, Reaction thermochemistry data, Gas Chromatography, 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
Data compiled as indicated in comments:
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
View reactions leading to C6H10+ (ion structure unspecified)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| Proton affinity (review) | 206.7 | kcal/mol | N/A | Hunter and Lias, 1998 | HL |
| Quantity | Value | Units | Method | Reference | Comment |
| Gas basicity | 200. | kcal/mol | N/A | Hunter and Lias, 1998 | HL |
Ionization energy determinations
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| 8.47 ± 0.02 | PE | Bieri, Burger, et al., 1977 | LLK |
| 8.42 | PE | Masclet, Mouvier, et al., 1981 | Vertical value; LLK |
Appearance energy determinations
| Ion | AE (eV) | Other Products | Method | Reference | Comment |
|---|---|---|---|---|---|
| C5H7+ | 10.23 ± 0.05 | CH3 | EI | Wolkoff, Holmes, et al., 1980 | LLK |
| C5H7+ | 8.45 | CH3 | EI | Lossing and Traeger, 1975 | LLK |
Gas Chromatography
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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: NIST Mass Spectrometry Data Center, William E. Wallace, director
Van Den Dool and Kratz RI, non-polar column, temperature ramp
| Column type | Active phase | I | Reference | Comment |
|---|---|---|---|---|
| Capillary | SPB-5 | 624. | Engel and Ratel, 2007 | 60. m/0.32 mm/1. μm, 40. C @ 2. min, 3. K/min, 230. C @ 10. min |
Normal alkane RI, non-polar column, temperature ramp
| Column type | Active phase | I | Reference | Comment |
|---|---|---|---|---|
| Capillary | PONA | 629. | Zhang, Ding, et al., 2009 | 50. m/0.20 mm/0.50 μm, Nitrogen, 35. C @ 15. min, 2. K/min, 200. C @ 10. min |
| Capillary | OV-101 | 635. | Chupalov and Zenkevich, 1996 | N2, 3. K/min; Column length: 52. m; Column diameter: 0.26 mm; Tstart: 50. C; Tend: 220. C |
Normal alkane RI, non-polar column, custom temperature program
| Column type | Active phase | I | Reference | Comment |
|---|---|---|---|---|
| Capillary | DB-1 | 630. | Ciccioli, Cecinato, et al., 1994 | 60. m/0.32 mm/0.25 μm; Program: not specified |
References
Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, Gas Chromatography, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Petrova-Kuminskaya, Roganov, et al., 1984
Petrova-Kuminskaya, S.V.; Roganov, G.N.; Kabo, G.Ya.,
Enthalpies of formation and isomerization of alkadienes,
Probl. Kalorim. Khim. Termodin., Dokl. Vses. Konf., 10th, 1984, 1, 234-236. [all data]
Petrova-Kuminskaya, Roganov, et al., 1984, 2
Petrova-Kuminskaya, S.V.; Roganov, G.N.; Kabo, G.Ya.,
Equilibrium of isomerization of 2-methylpentadienes,
Neftekhimiya, 1984, 24, 485-490. [all data]
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]
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]
Masclet, Mouvier, et al., 1981
Masclet, P.; Mouvier, G.; Bocquet, J.F.,
Effets electroniques et effets steriques dus a la substitution alcoyle dans les dienes conjugues,
J. Chim. Phys., 1981, 78, 99. [all data]
Wolkoff, Holmes, et al., 1980
Wolkoff, P.; Holmes, J.L.; Lossing, F.P.,
On the formation of cyclopentenium cations from all C6H10+ molecular ion structures,
Can. J. Chem., 1980, 58, 251. [all data]
Lossing and Traeger, 1975
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]
Engel and Ratel, 2007
Engel, E.; Ratel, J.,
Correction of the data generated by mass spectrometry analyses of biological tissues: Application to food authentication,
J. Chromatogr. A, 2007, 1154, 1-2, 331-341, https://doi.org/10.1016/j.chroma.2007.02.012
. [all data]
Zhang, Ding, et al., 2009
Zhang, X.; Ding, L.; Sun, Z.; Song, L.; Sun, T.,
Study on quantitative structure-retention relationships for hydrocarbons in FCC gasoline,
Chromatographia, 2009, 70, 3/4, 511-518, https://doi.org/10.1365/s10337-009-1174-0
. [all data]
Chupalov and Zenkevich, 1996
Chupalov, A.A.; Zenkevich, I.G.,
Chromatographic Characterization of Structural Transformations of Organic Compounds in Diels-Alder Reaction. Aliphatic Dienes and Dienophyls,
Zh. Org. Khim., 1996, 32, 6, 675-684. [all data]
Ciccioli, Cecinato, et al., 1994
Ciccioli, P.; Cecinato, A.; Brancaleoni, E.; Brachetti, A.; Frattoni, M.; Sparapani, R.,
Composition and Distribution of Polar and Non-Polar VOCs in Urban, Rural, Forest and Remote Areas,
Eur Commission EUR, 1994, 549-568. [all data]
Notes
Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, Gas Chromatography, References
- Symbols used in this document:
AE Appearance energy ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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