Octane, 2-methyl-

• Formula: C₉H₂₀
• Molecular weight: 128.2551
• IUPAC Standard InChI: InChI=1S/C9H20/c1-4-5-6-7-8-9(2)3/h9H,4-8H2,1-3H3 Copy

  
• IUPAC Standard InChIKey: ZUBZATZOEPUUQF-UHFFFAOYSA-N Copy
• CAS Registry Number: 3221-61-2
• 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.
• Species with the same structure:
  • (3RS,4SR)-dimethylheptane
  • (3RS,4RS)-dimethylheptane
  • (3RS,5SR)-dimethylheptane
  • (3RS,5RS)-dimethylheptane
• Other names: 2-Methyloctane; Isononane
• Information on this page:
  • Phase change data
  • References
  • Notes
• Other data available:
  • Henry's Law data
  • Mass spectrum (electron ionization)
  • Gas Chromatography
• Options:
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• NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data)

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Phase change data

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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 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

Enthalpy of vaporization

Enthalpy of fusion

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.

Mears, Fookson, et al., 1950
Mears, T.W.; Fookson, A.; Pomerantz, P.; Rich, E.H.; Dussinger, C.S.; Howard, F.L., Syntheses and Properties of Two Olefins, Six Paraffins, and Their Intermediates, J. Res. Natl. Bur. Stand. (U. S.), 1950, 44, 299. [all data]

Whitmore and Southgate, 1938
Whitmore, F.C.; Southgate, H.A., The Nonanes. 2-Methyl, 3-Ethyl, 2,3-dimethylheptane and 2,2,4,4-tetramethylpentane, J. Am. Chem. Soc., 1938, 60, 2571. [all data]

White and Glasgow, 1937
White, J.D.; Glasgow, A.R., Separation of the Three Methyl Octanes from Midcontinent Petroleum, J. Res. Natl. Bur. Stand. (U. S.), 1937, 19, 423. [all data]

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]

Abara, Jennings, et al., 1988
Abara, J.A.; Jennings, D.W.; Kay, W.B.; Teja, A.S., Phase Behavior in the Critical Region of Six Binary Mixtures of 2-Methylalkanes, J. Chem. Eng. Data, 1988, 33, 242. [all data]

Kay and Hissong, 1969
Kay, W.B.; Hissong, D.W., The Critical Properties of Hydrocarbon Mixtures constants, Proc. - Am. Pet. Inst., Div. Refin., 1969, 49, 13. [all data]

Reid, 1972
Reid, Robert C., Handbook on vapor pressure and heats of vaporization of hydrocarbons and related compounds, R. C. Wilhort and B. J. Zwolinski, Texas A Research Foundation. College Station, Texas(1971). 329 pages.$10.00, AIChE J., 1972, 18, 6, 1278-1278, https://doi.org/10.1002/aic.690180637 . [all data]

Labbauf, Greenshields, et al., 1961
Labbauf, A.; Greenshields, J.B.; Rossini, F.D., Heats of formation, combustion, and vaporization of the 35 nonanes and 75 decanes, J. Chem. Eng. Data, 1961, 6, 261-263. [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]

Helgeson, Owens, et al., 1998
Helgeson, Harold C.; Owens, Christine E.; Knox, Annette M.; Richard, Laurent, Calculation of the Standard Molal Thermodynamic Properties of Crystalline, Liquid, and Gas Organic Molecules at High Temperatures and Pressures, Geochimica et Cosmochimica Acta, 1998, 62, 6, 985-1081, https://doi.org/10.1016/S0016-7037(97)00219-6 . [all data]

Notes

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• Symbols used in this document:
  

  Pc	Critical pressure
  Tboil	Boiling point
  Tc	Critical temperature
  Tfus	Fusion (melting) point
  ΔfusH	Enthalpy of fusion
  ΔvapH	Enthalpy of vaporization
  ΔvapH°	Enthalpy of vaporization at standard conditions

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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