CH2=C(Me)CH2 anion
- Formula: C4H7-
- Molecular weight: 55.0989
- Information on this page:
- Other data available:
- Options:
Reaction thermochemistry 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 by: John E. Bartmess
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
C4H7- + =
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 393.0 ± 1.8 | kcal/mol | Endo | Wenthold, Hu, et al., 1999 | gas phase |
| ΔrH° | 387.0 ± 2.0 | kcal/mol | D-EA | Wenthold, Polak, et al., 1996 | gas phase |
| ΔrH° | 390.3 ± 2.3 | kcal/mol | G+TS | Bartmess and Burnham, 1984 | gas phase |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | 385.6 ± 1.9 | kcal/mol | H-TS | Wenthold, Hu, et al., 1999 | gas phase |
| ΔrG° | 379.6 ± 2.1 | kcal/mol | H-TS | Wenthold, Polak, et al., 1996 | gas phase |
| ΔrG° | 382.9 ± 2.2 | kcal/mol | IMRE | Bartmess and Burnham, 1984 | gas phase |
References
Go To: Top, Reaction thermochemistry data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Wenthold, Hu, et al., 1999
Wenthold, P.G.; Hu, J.; Squires, R.R.; Lineberger, W.C.,
Photoelectron spectroscopy of the trimethylenemethane negative ion,
J. Am. Soc. Mass Spectrom., 1999, 10, 9, 800-809, https://doi.org/10.1016/S1044-0305(99)00043-4
. [all data]
Wenthold, Polak, et al., 1996
Wenthold, P.G.; Polak, M.L.; Lineberger, W.C.,
Photoelectron Spectroscopy of the Allyl and 2-Methylallyl Anions,
J. Phys. Chem., 1996, 100, 17, 6920, https://doi.org/10.1021/jp953401n
. [all data]
Bartmess and Burnham, 1984
Bartmess, J.E.; Burnham, R.,
Effect of central substituents on the gas phase acidities of propenes,
J. Org. Chem., 1984, 49, 1382. [all data]
Notes
Go To: Top, Reaction thermochemistry data, References
- Symbols used in this document:
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
- The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
- Customer support for NIST Standard Reference Data products.