Cyclooctane

• Formula: C₈H₁₆
• Molecular weight: 112.2126
• IUPAC Standard InChI: InChI=1S/C8H16/c1-2-4-6-8-7-5-3-1/h1-8H2 Copy

  
• IUPAC Standard InChIKey: WJTCGQSWYFHTAC-UHFFFAOYSA-N Copy
• CAS Registry Number: 292-64-8
• 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: Octamethylene
• Permanent link for this species. Use this link for bookmarking this species for future reference.
• Information on this page:
  • Phase change data
  • References
  • Notes
• Other data available:
  • Gas phase thermochemistry data
  • Condensed phase thermochemistry data
  • Reaction thermochemistry data
  • Henry's Law data
  • Gas phase ion energetics data
  • IR Spectrum
  • Mass spectrum (electron ionization)
  • Gas Chromatography
• Data at other public NIST sites:
  • Gas Phase Kinetics Database
• Options:
  • Switch to calorie-based units

Data at NIST subscription sites:

• NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data)

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:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
BS - Robert L. Brown and Stephen E. Stein
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
AC - William E. Acree, Jr., James S. Chickos
DH - Eugene S. Domalski and Elizabeth D. Hearing

Reduced pressure boiling point

Enthalpy of vaporization

Antoine Equation Parameters

log₁₀(P) = A − (B / (T + C))
    P = vapor pressure (bar)
    T = temperature (K)

View plot Requires a JavaScript / HTML 5 canvas capable browser.

Enthalpy of sublimation

Enthalpy of fusion

Enthalpy of phase transition

Entropy of phase transition

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.

Finke, Scott, et al., 1956
Finke, H.L.; Scott, D.W.; Gross, M.E.; Messerly, J.F.; Waddington, G., Cycloheptane, Cyclooctane and 1,3,5-Cycloheptatriene. Low Temperature Thermal Properties, Vapor Pressure and Derived Chemical Thermodynamic Prop., J. Am. Chem. Soc., 1956, 78, 5469. [all data]

Waddington, 1955
Waddington, G., Personal Commun., 1955. [all data]

Kaarsemaker, 1951
Kaarsemaker, S., , Thesis, 1951. [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]

Young, 1972
Young, C.L., Gas-liquid critical properties of the cycloalkanes and their mixtures, Aust. J. Chem., 1972, 25, 1625-30. [all data]

Hicks and Young, 1971
Hicks, C.P.; Young, C.L., Critical Temperatures of Mixtures of Quasi-spherical Molecules. Alicyclic Hydrocarbons + Benzene, + Hexafluorobenzene and + Perfluorocyclohexane, Trans. Faraday Soc., 1971, 67, 1605-11. [all data]

Finke, Scott, et al., 1956, 2
Finke, H.L.; Scott, D.W.; Gross, M.E.; Messerly, J.F.; Waddington, G., Cycloheptane, cyclooctane and 1,3,5-cycloheptatriene. Low temperature thermal properties, vapor pressure and derived chemical thermodynamic properties, J. Am. Chem. Soc., 1956, 78, 5469-54. [all data]

Finke, Scott, et al., 1956, 3
Finke, H.L.; Scott, D.W.; Gross, M.E.; Messerly, J.F.; Waddington, G., Cycloheptane, cyclooctane and 1,3,5-cycloheptatriene. Low temperature thermal properties, vapor pressure and derived chemical thermodynamic properties, J. Am. Chem. Soc., 1956, 78, 5469-5476. [all data]

Kaarsemaker and Coops, 1952
Kaarsemaker, S.; Coops, J., Thermal quantities of some cycloparaffins. Part III. Results of measurements, Rec. Trav. Chim. Pays/Bas, 1952, 71, 261. [all data]

Spitzer and Huffman, 1947
Spitzer, R.; Huffman, H.M., The heats of combustion of cyclopentane, cyclohexane, cycloheptane and cyclooctane, J. Am. Chem. Soc., 1947, 69, 211-213. [all data]

Aldrich Chemical Company Inc., 1990
Aldrich Chemical Company Inc., Catalog Handbook of Fine Chemicals, Aldrich Chemical Company, Inc., Milwaukee WI, 1990, 1. [all data]

Weast and Grasselli, 1989
CRC Handbook of Data on Organic Compounds, 2nd Editon, Weast,R.C and Grasselli, J.G., ed(s)., CRC Press, Inc., Boca Raton, FL, 1989, 1. [all data]

Wu, Locke, et al., 1991
Wu, Huey S.; Locke, William E.; Sandler, Stanley I., Isothermal vapor-liquid equilibrium of binary mixtures containing morpholine, J. Chem. Eng. Data, 1991, 36, 1, 127-130, https://doi.org/10.1021/je00001a037 . [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]

Meyer and Hotz, 1976
Meyer, Edwin F.; Hotz, Carol A., Cohesive energies in polar organic liquids. 3. Cyclic ketones, J. Chem. Eng. Data, 1976, 21, 3, 274-279, https://doi.org/10.1021/je60070a035 . [all data]

Anand, Grolier, et al., 1975
Anand, Subhash C.; Grolier, Jean P.E.; Kiyohara, Osamu; Halpin, Carl J.; Benson, George C., Thermodynamic properties of some cycloalkane-cycloalkanol systems at 298. 15K. III, J. Chem. Eng. Data, 1975, 20, 2, 184-189, https://doi.org/10.1021/je60065a020 . [all data]

Bondi, 1963
Bondi, A., Heat of Siblimation of Molecular Crystals: A Catalog of Molecular Structure Increments., J. Chem. Eng. Data, 1963, 8, 3, 371-381, https://doi.org/10.1021/je60018a027 . [all data]

Acree, 1991
Acree, William E., Thermodynamic properties of organic compounds: enthalpy of fusion and melting point temperature compilation, Thermochimica Acta, 1991, 189, 1, 37-56, https://doi.org/10.1016/0040-6031(91)87098-H . [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
  Ttriple	Triple point temperature
  Vc	Critical volume
  ΔHtrs	Enthalpy of phase transition
  ΔStrs	Entropy of phase transition
  ΔfusH	Enthalpy of fusion
  ΔsubH	Enthalpy of sublimation
  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.