Pentane, 2,3,3-trimethyl-
- Formula: C8H18
- Molecular weight: 114.2285
- IUPAC Standard InChIKey: OKVWYBALHQFVFP-UHFFFAOYSA-N
- CAS Registry Number: 560-21-4
- 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: 2,3,3-Trimethylpentane; C2H5C(CH3)2CH(CH3)2
- Permanent link for this species. Use this link for bookmarking this species for future reference.
- Information on this page:
- Other data available:
- Data at other public NIST sites:
- Options:
Data at NIST subscription sites:
NIST subscription sites provide data under the NIST Standard Reference Data Program, but require an annual fee to access. The purpose of the fee is to recover costs associated with the development of data collections included in such sites. Your institution may already be a subscriber. Follow the links above to find out more about the data in these sites and their terms of usage.
Phase change 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 as indicated in comments:
BS - Robert L. Brown and Stephen E. Stein
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Tboil | 387.8 ± 0.3 | K | AVG | N/A | Average of 18 out of 21 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
Tfus | 172. ± 1. | K | AVG | N/A | Average of 14 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
Tc | 573.5 ± 0.5 | K | N/A | Daubert, 1996 | |
Tc | 573.49 | K | N/A | McMicking and Kay, 1965 | Uncertainty assigned by TRC = 0.4 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Pc | 28.2 ± 0.4 | bar | N/A | Daubert, 1996 | |
Pc | 28.202 | bar | N/A | McMicking and Kay, 1965 | Uncertainty assigned by TRC = 0.4053 bar; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Vc | 0.455 | l/mol | N/A | Daubert, 1996 | |
Quantity | Value | Units | Method | Reference | Comment |
ρc | 2.20 ± 0.04 | mol/l | N/A | Daubert, 1996 | |
ρc | 2.20 | mol/l | N/A | McMicking and Kay, 1965 | Uncertainty assigned by TRC = 0.04 mol/l; TRC |
Quantity | Value | Units | Method | Reference | Comment |
ΔvapH° | 37.2 ± 0.5 | kJ/mol | AVG | N/A | Average of 9 values; Individual data points |
Enthalpy of vaporization
ΔvapH (kJ/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
32.12 | 387.9 | N/A | Majer and Svoboda, 1985 | |
37.1 ± 0.1 | 308. | C | Svoboda, 1998 | AC |
36.6 ± 0.1 | 315. | C | Svoboda, 1998 | AC |
36.0 ± 0.1 | 323. | C | Svoboda, 1998 | AC |
35.5 ± 0.1 | 330. | C | Svoboda, 1998 | AC |
35.1 ± 0.1 | 338. | C | Svoboda, 1998 | AC |
34.8 ± 0.1 | 348. | C | Svoboda, 1998 | AC |
34.1 ± 0.1 | 358. | C | Svoboda, 1998 | AC |
33.5 ± 0.1 | 368. | C | Svoboda, 1998 | AC |
36.9 ± 0.1 | 308. | C | Svoboda, 1998 | AC |
36.5 ± 0.1 | 315. | C | Svoboda, 1998 | AC |
36.0 ± 0.1 | 323. | C | Svoboda, 1998 | AC |
35.5 ± 0.1 | 330. | C | Svoboda, 1998 | AC |
35.1 ± 0.1 | 338. | C | Svoboda, 1998 | AC |
34.4 ± 0.1 | 348. | C | Svoboda, 1998 | AC |
33.9 ± 0.1 | 358. | C | Svoboda, 1998 | AC |
33.3 ± 0.1 | 368. | C | Svoboda, 1998 | AC |
36.1 | 321. | A,MM | Stephenson and Malanowski, 1987 | Based on data from 306. to 384. K. See also Willingham, Taylor, et al., 1945.; AC |
36.4 | 323. | A,MM | Stephenson and Malanowski, 1987 | Based on data from 308. to 390. K. See also Willingham, Taylor, et al., 1945.; AC |
References
Go To: Top, Phase change data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Daubert, 1996
Daubert, T.E.,
Vapor-Liquid Critical Properties of Elements and Compounds. 5. Branched Alkanes and Cycloalkanes,
J. Chem. Eng. Data, 1996, 41, 365-372. [all data]
McMicking and Kay, 1965
McMicking, J.H.; Kay, W.B.,
Vapor Pressures and Saturated Liquid and Vapor Densities of The Isomeric Heptanes and Isomeric Octanes,
Proc., Am. Pet. Inst., Sect. 3, 1965, 45, 75-90. [all data]
Majer and Svoboda, 1985
Majer, V.; Svoboda, V.,
Enthalpies of Vaporization of Organic Compounds: A Critical Review and Data Compilation, Blackwell Scientific Publications, Oxford, 1985, 300. [all data]
Svoboda, 1998
Svoboda, V.,
Enthalpies of vaporization, and the cohesive and internal energies of 2,2-dimethylpentane, 2,4-dimethylpentane, 2,2,3-trimethylpentane, 2,3,3-trimethylpentane, and 3-ethylpentane,
The Journal of Chemical Thermodynamics, 1998, 30, 11, 1411-1417, https://doi.org/10.1006/jcht.1998.0414
. [all data]
Stephenson and Malanowski, 1987
Stephenson, Richard M.; Malanowski, Stanislaw,
Handbook of the Thermodynamics of Organic Compounds, 1987, https://doi.org/10.1007/978-94-009-3173-2
. [all data]
Willingham, Taylor, et al., 1945
Willingham, C.B.; Taylor, W.J.; Pignocco, J.M.; Rossini, F.D.,
Vapor pressures and boiling points of some paraffin, alkylcyclopentane, alkylcyclohexane, and alkylbenzene hydrocarbons,
J. RES. NATL. BUR. STAN., 1945, 35, 3, 219-17, https://doi.org/10.6028/jres.035.009
. [all data]
Notes
Go To: Top, Phase change data, References
- Symbols used in this document:
Pc Critical pressure Tboil Boiling point Tc Critical temperature Tfus Fusion (melting) point Vc Critical volume ΔvapH Enthalpy of vaporization ΔvapH° Enthalpy of vaporization at standard conditions ρc Critical density - 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.