Pentane, 2,3-dimethyl-
- Formula: C7H16
- Molecular weight: 100.2019
- IUPAC Standard InChI: InChI=1S/C7H16/c1-5-7(4)6(2)3/h6-7H,5H2,1-4H3
- IUPAC Standard InChIKey: WGECXQBGLLYSFP-UHFFFAOYSA-N
- CAS Registry Number: 565-59-3
- 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: 2,3-Dimethylpentane; 3,4-Dimethylpentane
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Gas phase thermochemistry data
Go To: Top, Reaction thermochemistry data, References, Notes
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:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DRB - Donald R. Burgess, Jr.
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | -199.2 ± 1.3 | kJ/mol | Ccb | Prosen and Rossini, 1945 | ALS |
| ΔfH°gas | -198.7 | kJ/mol | N/A | Davies and Gilbert, 1941 | Value computed using ΔfHliquid° value of -233.0±1.0 kj/mol from Davies and Gilbert, 1941 and ΔvapH° value of 34.3 kj/mol from Prosen and Rossini, 1945.; DRB |
Reaction thermochemistry data
Go To: Top, Gas phase thermochemistry data, 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: C7H14 + H2 = C7H16
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -106.4 ± 1.6 | kJ/mol | Chyd | Rogers and Dejroongruang, 1989 | liquid phase; solvent: Cyclohexane |
| ΔrH° | -113. ± 4.6 | kJ/mol | Chyd | Lopes, Nunes, et al., 1975 | liquid phase; solvent: Acetic acid |
=
By formula: C7H16 = C7H16
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -9.1 ± 1.1 | kJ/mol | Ccb | Prosen and Rossini, 1941 | liquid phase; Heat of Isomerization |
| ΔrH° | -11.7 ± 1.3 | kJ/mol | Ccb | Prosen and Rossini, 1941 | gas phase; Heat of Isomerization |
+
=
By formula: H2 + C7H14 = C7H16
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -114.0 ± 1.3 | kJ/mol | Chyd | Rogers and Dejroongruang, 1989 | liquid phase; solvent: Cyclohexane |
+
=
By formula: H2 + C7H14 = C7H16
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -108.0 ± 0.4 | kJ/mol | Chyd | Rogers and Dejroongruang, 1989 | liquid phase; solvent: Cyclohexane |
+
=
By formula: H2 + C7H14 = C7H16
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -108.3 ± 0.4 | kJ/mol | Chyd | Rogers and Dejroongruang, 1989 | liquid phase; solvent: Cyclohexane |
+
=
By formula: H2 + C7H14 = C7H16
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -113.5 ± 0.7 | kJ/mol | Chyd | Rogers and Dejroongruang, 1989 | liquid phase; solvent: Cyclohexane |
+
=
By formula: H2 + C7H14 = C7H16
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 121.8 ± 0.8 | kJ/mol | Chyd | Rogers and Dejroongruang, 1989 | liquid phase; solvent: Cyclohexane |
References
Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Prosen and Rossini, 1945
Prosen, E.J.; Rossini, F.D.,
Heats of combustion and formation of the paraffin hydrocarbons at 25° C,
J. Res. NBS, 1945, 263-267. [all data]
Davies and Gilbert, 1941
Davies, G.F.; Gilbert, E.C.,
Heats of combustion and formation of the nine isomeric heptanes in the liquid state,
J. Am. Chem. Soc., 1941, 63, 2730-2732. [all data]
Rogers and Dejroongruang, 1989
Rogers, D.W.; Dejroongruang, K.,
Enthalpies of hydrogenation of the dimethylpentenes, ethylpentenes, methylbutene, and trimethylbutene,
J. Chem. Thermodyn., 1989, 21, 1115-1120. [all data]
Lopes, Nunes, et al., 1975
Lopes, M.T.R.; Nunes, M.F.T.; Florencio, M.H.F.S.; Mota, M.M.G.; Fernandez, M.T.N.,
Heats of hydrogenation in solution. I. Calorimeter for semimicro determinations,
Rev. Port. Quim., 1975, 15, 129-132. [all data]
Prosen and Rossini, 1941
Prosen, E.J.R.; Rossini, F.D.,
Heats of isomerization of the nine heptanes,
J. Res. NBS, 1941, 27, 519-528. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, References
- Symbols used in this document:
ΔfH°gas Enthalpy of formation of gas at standard conditions ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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