Cyclopentanone

• Formula: C₅H₈O
• Molecular weight: 84.1164
• IUPAC Standard InChI: InChI=1S/C5H8O/c6-5-3-1-2-4-5/h1-4H2 Copy

  
• IUPAC Standard InChIKey: BGTOWKSIORTVQH-UHFFFAOYSA-N Copy
• CAS Registry Number: 120-92-3
• 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.
• Other names: Adipic ketone; Adipinketon; Dumasin; Ketocyclopentane; Ketopentamethylene; UN 2245; NSC 4122
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• Information on this page:
  • Gas phase thermochemistry data
  • Phase change data
  • Gas phase ion energetics data
  • References
  • Notes
• Other data available:
  • Condensed phase thermochemistry data
  • Reaction thermochemistry data
  • IR Spectrum
  • Mass spectrum (electron ionization)
  • UV/Visible spectrum
  • Gas Chromatography
• Data at other public NIST sites:
  • Gas Phase Kinetics Database
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Gas phase thermochemistry 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:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
GT - Glushko Thermocenter, Russian Academy of Sciences, Moscow

Constant pressure heat capacity of gas

Constant pressure heat capacity of gas

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
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Enthalpy of vaporization

Antoine Equation Parameters

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

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Enthalpy of fusion

Gas phase ion energetics 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 evaluated as indicated in comments:
HL - Edward P. Hunter and Sharon G. Lias
L - Sharon G. Lias

Data compiled as indicated in comments:
B - John E. Bartmess
MM - Michael M. Meot-Ner (Mautner)
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron

Electron affinity determinations

Proton affinity at 298K

Ionization energy determinations

De-protonation reactions

C₅H₇O^- +  =

By formula: C₅H₇O^- + H⁺ = C₅H₈O

References

Go To: Top, Gas phase thermochemistry data, Phase change data, Gas phase ion energetics data, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Wiberg, Crocker, et al., 1991
Wiberg, K.B.; Crocker, L.S.; Morgan, K.M., Thermochemical studies of carbonyl compounds. 5. Enthalpies of reduction of carbonyl groups, J. Am. Chem. Soc., 1991, 113, 3447-3450. [all data]

Wolf, 1972
Wolf, G., Thermochemische Untersuchungen an cyclischen Ketonen, Helv. Chim. Acta, 1972, 55, 1446-1459. [all data]

Sellers and Sunner, 1962
Sellers, P.; Sunner, S., Heats of combustion of cyclic ketones and alcohols, Acta Chem. Scand., 1962, 16, 46-52. [all data]

Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G., Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [all data]

Thermodynamics Research Center, 1997
Thermodynamics Research Center, Selected Values of Properties of Chemical Compounds., Thermodynamics Research Center, Texas A&M University, College Station, Texas, 1997. [all data]

Shvaro O.V., 1987
Shvaro O.V., Thermodynamic properties of cyclopentanone and cyclohexanone, Inzh.-Fiz. Zh., 1987, 52, 807-812. [all data]

Andreevskii D.N., 1976
Andreevskii D.N., Thermodynamic properties of C4-C6 cyclic ketones, Zh. Prikl. Khim., 1976, 49, 1819-1823. [all data]

Wurflinger and Kreutzenbeck, 1978
Wurflinger, Alber (see wuerfl a); Kreutzenbeck, J., J. Phys. Chem. Solids, 1978, 39, 193. [all data]

Anonymous, 1954
Anonymous, R., , Am. Pet. Inst. Res. Proj. 45, Tech. Rep. 13, Ohio State Univ., 1954. [all data]

Timmermans, 1952
Timmermans, J., Freezing points of organic compounds. VVI New determinations., Bull. Soc. Chim. Belg., 1952, 61, 393. [all data]

Timmermans and Hennaut-Roland, 1937
Timmermans, J.; Hennaut-Roland, M., Works from International Bureau at Physical-Chemical Standards. VIII. Physical constants of 20 organic compounds, J. Chim. Phys. Phys.-Chim. Biol., 1937, 34, 693. [all data]

Shvaro, 1987
Shvaro, O.V., Thermodynamics of some cyclic and acyclic ketones and alcohols C4-C7, Ph.D. Thesis, Byeloruss. State Univ., Minsk, 1987. [all data]

Ambrose and Ghiassee, 1987
Ambrose, D.; Ghiassee, N.B., Vapor Pressures and Critical Temperatures and Critical Pressures of C5 and C6 Cyclic Alcohols and Ketones, J. Chem. Thermodyn., 1987, 19, 903. [all data]

Teodorescu, Barhala, et al., 2006
Teodorescu, Mariana; Barhala, Alexandru; Dragoescu, Dana, Isothermal (vapour+liquid) equilibria for the binary (cyclopentanone or cyclohexanone with 1,1,2,2-tetrachloroethane) systems at temperatures of (343.15, 353.15, and 363.15)K, The Journal of Chemical Thermodynamics, 2006, 38, 11, 1432-1437, https://doi.org/10.1016/j.jct.2006.01.010 . [all data]

Ambrose and Ghiassee, 1987, 2
Ambrose, D.; Ghiassee, N.B., Vapour pressures and critical temperatures and critical pressures of C5 and C6 cyclic alcohols and ketones, The Journal of Chemical Thermodynamics, 1987, 19, 9, 903-909, https://doi.org/10.1016/0021-9614(87)90036-X . [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]

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]

Benson and Kistiakowsky, 1942
Benson, S.W.; Kistiakowsky, G.B., The Photochemical Decomposition of Cyclic Ketones, J. Am. Chem. Soc., 1942, 64, 1, 80-86, https://doi.org/10.1021/ja01253a021 . [all data]

Gonthier-Vassal and Szwarc, 1998
Gonthier-Vassal, Anne; Szwarc, Henri, Thermodynamic properties of cycloketones: A DSC study, Thermochimica Acta, 1998, 320, 1-2, 141-154, https://doi.org/10.1016/S0040-6031(98)00409-2 . [all data]

Hunter and Lias, 1998
Hunter, E.P.; Lias, S.G., Evaluated Gas Phase Basicities and Proton Affinities of Molecules: An Update, J. Phys. Chem. Ref. Data, 1998, 27, 3, 413-656, https://doi.org/10.1063/1.556018 . [all data]

Desfrancois, Abdoul-Carime, et al., 1994
Desfrancois, C.; Abdoul-Carime, H.; Khelifa, N.; Schermann, J.P., Fork 1/r to 1/r2 Potentials: Electron Exchange between Rydberg Atoms and Polar Molecules, Phys. Rev. Lett., 1994, 73, 18, 2436, https://doi.org/10.1103/PhysRevLett.73.2436 . [all data]

Morlender-Vais and Holmes, 2001
Morlender-Vais, N.; Holmes, J.L., Proton affinities of two weakly bidentate molecules: 1,2-Dimethoxyethane and methoxyacetone, Int. J. Mass Spectrom., 2001, 210/211, 147. [all data]

Cocksey, Eland, et al., 1971
Cocksey, B.J.; Eland, J.H.D.; Danby, C.J., The effect of alkyl substitution on ionisation potential, J. Chem. Soc., 1971, (B), 790. [all data]

Chadwick, Frost, et al., 1971
Chadwick, D.; Frost, D.C.; Weiler, L., Photoelectron spectra of cyclopentanone and cyclopentenones, J. Am. Chem. Soc., 1971, 93, 4320. [all data]

Watanabe, Nakayama, et al., 1962
Watanabe, K.; Nakayama, T.; Mottl, J., Ionization potentials of some molecules, J. Quant. Spectry. Radiative Transfer, 1962, 2, 369. [all data]

Vilesov, 1960
Vilesov, F.I., The photoionization of vapors of compounds whose molecules contain carbonyl groups, Dokl. Phys. Chem., 1960, 132, 521, In original 1332. [all data]

Bieri, Asbrink, et al., 1982
Bieri, G.; Asbrink, L.; Von Niessen, W., 30.4-nm He(II) photoelectron spectra of organic molecules, J. Electron Spectrosc. Relat. Phenom., 1982, 27, 129. [all data]

Kovac and Klasinc, 1978
Kovac, B.; Klasinc, L., Photoelectron spectroscopy of adamantane and some adamantanones, Croat. Chem. Acta, 1978, 51, 55. [all data]

Gerson, Worley, et al., 1978
Gerson, S.H.; Worley, S.D.; Bodor, N.; Kaminski, J.J.; Flechtner, T.W., The photoelectron spectra of some heterocyclic compounds which contain N, O, Cl, and Br, J. Electron Spectrosc. Relat. Phenom., 1978, 13, 421. [all data]

Hentrich, Gunkel, et al., 1974
Hentrich, G.; Gunkel, E.; Klessinger, M., Photoelektronenspektren organischer verbindungen. 4. Photoelektronenspektren ungesattigter carbonylverbindungen, J. Mol. Struct., 1974, 21, 231. [all data]

Chadwick, Frost, et al., 1971, 2
Chadwick, D.; Frost, D.C.; Weiler, L., The photoelectron spectra of cyclic ketones, Tetrahedron Lett., 1971, 47, 4543. [all data]

Brickhouse and Squires, 1988
Brickhouse, M.D.; Squires, R.R., Gas Phase Bronsted vs. Lewis Acid-Base Reactions of 6,6-Dimethylfulvene. A Sensitive Probe of the Electronic Structures of Organic Anions, J. Am. Chem. Soc., 1988, 110, 9, 2706, https://doi.org/10.1021/ja00217a002 . [all data]

Notes

Go To: Top, Gas phase thermochemistry data, Phase change data, Gas phase ion energetics data, References

• Symbols used in this document:
  

  Cp,gas	Constant pressure heat capacity of gas
  EA	Electron affinity
  IE (evaluated)	Recommended ionization energy
  Pc	Critical pressure
  Tboil	Boiling point
  Tc	Critical temperature
  Tfus	Fusion (melting) point
  Ttriple	Triple point temperature
  ΔfH°gas	Enthalpy of formation of gas at standard conditions
  ΔfusH	Enthalpy of fusion
  ΔrG°	Free energy of reaction at standard conditions
  ΔrH°	Enthalpy of reaction at standard conditions
  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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