1-Propanol, 2-methyl-

• Formula: C₄H₁₀O
• Molecular weight: 74.1216
• IUPAC Standard InChI: InChI=1S/C4H10O/c1-4(2)3-5/h4-5H,3H2,1-2H3 Copy

  
• IUPAC Standard InChIKey: ZXEKIIBDNHEJCQ-UHFFFAOYSA-N Copy
• CAS Registry Number: 78-83-1
• 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: Isobutyl alcohol; Isobutanol; Isopropylcarbinol; 2-Methyl-1-propanol; iso-C4H9OH; Fermentation butyl alcohol; 1-Hydroxymethylpropane; 2-Methylpropanol; 2-Methylpropan-1-ol; 2-Methylpropanol-1; 2-Methylpropyl alcohol; Butanol-iso; Alcool isobutylique; Isobutylalkohol; Rcra waste number U140; UN 1212; i-Butyl alcohol; Isopropyl carbitol; Propanol, 2-methyl-; 2-methyl-1-propanyl alcohol; i-Butanol; Methyl-2 propanol-1; NSC 5708; 2-methylpropanoI
• Permanent link for this species. Use this link for bookmarking this species for future reference.
• Information on this page:
  • Gas phase thermochemistry data
  • Condensed phase thermochemistry data
  • Phase change data
  • Reaction thermochemistry data
  • Gas phase ion energetics data
  • Ion clustering data
  • IR Spectrum
  • References
  • Notes
• Other data available:
  • Henry's Law data
  • Mass spectrum (electron ionization)
  • Gas Chromatography
• Data at other public NIST sites:
  • Gas Phase Kinetics Database
• Options:
  • Switch to SI units

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

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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
DRB - Donald R. Burgess, Jr.
GT - Glushko Thermocenter, Russian Academy of Sciences, Moscow

Constant pressure heat capacity of gas

Condensed 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
DH - Eugene S. Domalski and Elizabeth D. Hearing

Constant pressure heat capacity of liquid

Constant pressure heat capacity of solid

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

Enthalpy of vaporization

Enthalpy of vaporization

Δ_vapH = A exp(-αT_r) (1 − T_r)^β
    Δ_vapH = Enthalpy of vaporization (at saturation pressure) (kcal/mol)
    T_r = reduced temperature (T / T_c)

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Antoine Equation Parameters

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

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Enthalpy of fusion

Entropy of fusion

Reaction 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:
B - John E. Bartmess
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
RCD - Robert C. Dunbar

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

C₄H₉O^- +  =

By formula: C₄H₉O^- + H⁺ = C₄H₁₀O

 +  =

By formula: H₂ + C₄H₈O = C₄H₁₀O

 +  = ( • )

By formula: Na⁺ + C₄H₁₀O = (Na⁺ • C₄H₁₀O)

=  + 

By formula: C₄H₁₀O = H₂ + C₄H₈O

 +  =

By formula: C₄H₈ + C₄H₁₀O = C₈H₁₈O

 +  =

By formula: C₂H₂O + C₄H₁₀O = C₆H₁₂O₂

 +  = ( • )

By formula: Li⁺ + C₄H₁₀O = (Li⁺ • C₄H₁₀O)

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
LL - Sharon G. Lias and Joel F. Liebman
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

Ionization energy determinations

Appearance energy determinations

De-protonation reactions

C₄H₉O^- +  =

By formula: C₄H₉O^- + H⁺ = C₄H₁₀O

Ion clustering 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 by: Robert C. Dunbar

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. Searches may be limited to ion clustering reactions. A general reaction search form is also available.

Clustering reactions

 +  = ( • )

By formula: Li⁺ + C₄H₁₀O = (Li⁺ • C₄H₁₀O)

 +  = ( • )

By formula: Na⁺ + C₄H₁₀O = (Na⁺ • C₄H₁₀O)

IR Spectrum

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Data compiled by: Coblentz Society, Inc.

• SOLUTION (0.5% IN CCl4 FOR 3800-1333, 0.5% IN CS2 FOR 1333-450 CM^-1) VS SOLVENT; DOW KBr FOREPRISM-GRATING; DIGITIZED BY NIST FROM HARD COPY (FROM TWO SEGMENTS); 4 cm^-1 resolution
• SOLUTION (10% IN CCl4 FOR 3800-1340, 10% IN CS2 FOR 1340-400 CM^-1) VS. SOLVENT; DOW KBr FOREPRISM-GRATING; DIGITIZED BY NIST FROM HARD COPY (FROM TWO SEGMENTS); 4 cm^-1 resolution
• VAPOR (SATURATED); DOW KBr FOREPRISM-GRATING; DIGITIZED BY NIST FROM HARD COPY (FROM TWO SEGMENTS); 4 cm^-1 resolution

Data compiled by: Tanya L. Myers, Russell G. Tonkyn, Ashley M. Oeck, Tyler O. Danby, John S. Loring, Matthew S. Taubman, Stephen W. Sharpe, Jerome C. Birnbaum, and Timothy J. Johnson

• liquid; Bruker Tensor 27 FTIR; 0.4821395 cm^-1 resolution

Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director

• gas

References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, Notes

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

Connett, 1975
Connett, J.E., Chemical equilibria 6. Measurement of equilibrium constants for the dehydrogenation of 2-methylpropan-1-ol by a vapour-flow technique, J. Chem. Thermodyn., 1975, 7, 1159-1162. [all data]

Chao and Rossini, 1965
Chao, J.; Rossini, F.D., Heats of combustion, formation, and isomerization of nineteen alkanols, J. Chem. Eng. Data, 1965, 10, 374-379. [all data]

Skinner and Snelson, 1960
Skinner, H.A.; Snelson, A., The heats of combustion of the four isomeric butyl alcohols, Trans. Faraday Soc., 1960, 56, 1776-1783. [all data]

Counsell J.F., 1968
Counsell J.F., Thermodynamic properties of organic oxygen compounds. Part XIX. Low-temperature heat capacity and entropy of propan-1-ol, 2-methylpropan-1-ol, and pentan-1-ol, J. Chem. Soc. A, 1968, 1819-1823. [all data]

Stromsoe E., 1970
Stromsoe E., Heat capacity of alcohol vapors at atmospheric pressure, J. Chem. Eng. Data, 1970, 15, 286-290. [all data]

Counsell J.F., 1970
Counsell J.F., Thermodynamic properties of organic oxygen compounds. 24. Vapor heat capacities and enthalpies of vaporization of ethanol, 2-methyl-1-propanol, and 1-pentanol, J. Chem. Thermodyn., 1970, 2, 367-372. [all data]

Rossini, 1934
Rossini, F.D., Heats of combustion and of formation of the normal aliphatic alcohols in the gaseous and liquid states, and the energies of their atomic linkages, J. Res. NBS, 1934, 13, 189-197. [all data]

Richards and Davis, 1920
Richards, T.W.; Davis, H.S., The heats of combustion of benzene, toluene, aliphatic alcohols, cyclohexanol, and other carbon compounds, J. Am. Chem. Soc., 1920, 42, 1599-1617. [all data]

Counsell, Lees, et al., 1968
Counsell, J.F.; Lees, E.B.; Martin, J.F., Thermodynamic properties of organic oxygen compounds. Part XIX. Low temperature heat capacity and entropy of propan-1-ol, 2-methyl-propan-1-ol, and pentan-1-ol, 1968, J. [all data]

Okano, Ogawa, et al., 1988
Okano, T.; Ogawa, H.; Murakami, S., Molar excess volumes, isentropic compressions, and isobaric heat capacities of methanol-isomeric butanol systems at 298.15 K, Can. J. Chem., 1988, 66, 713-717. [all data]

Piekarski and Somsen, 1988
Piekarski, H.; Somsen, G., Heat capacities and volumes of mixtures of N,N-dimethylformamide with isobutanol, sec-butanol and t-pentanol, J. Chem. Soc., Faraday Trans. 1, 1988, 84(2), 529-537. [all data]

Rybalkin, Emel'yanov, et al., 1978
Rybalkin, V.I.; Emel'yanov, V.M.; Stupak, P.M.; Litovchenko, N.P.; Z'ola, M.I., Study of the heat capacity of initial compounds and reaction products in the production of metal dialkyldithiophosphates, B.S.R. Inst. Neftepererab. Neftekhim. Prom. (Kiev), 1978, (16), 48-50. [all data]

Paz Andrade, Paz, et al., 1970
Paz Andrade, M.I.; Paz, J.M.; Recacho, E., Contribucion a la microcalorimetria de los calores especificos de solidos y liquidos, An. Quim., 1970, 66, 961-967. [all data]

Swietoslawski and Zielenkiewicz, 1960
Swietoslawski, W.; Zielenkiewicz, A., Mean specific heat in homologous series of binary and ternary positive azeotropes, Bull. Acad. Pol. Sci. Ser. Sci. Chim., 1960, 8, 651-653. [all data]

Swietoslawski and Zielenkiewicz, 1958
Swietoslawski, W.; Zielenkiewicz, A., Mean specific heats of binary positive azeotropes, Bull. Acad. Pol. Sci. Ser. Sci. Chim., 1958, 6, 367-369. [all data]

Zhdanov, 1941
Zhdanov, A.K., Specific heats of some liquids and azeotropic mixtures, Zhur. Obshch. Khim., 1941, 11, 471-482. [all data]

Willams and Daniels, 1924
Willams, J.W.; Daniels, F., The specific heats of certain organic liquids at elevated temperatures, J. Am. Chem. Soc., 1924, 46, 903-917. [all data]

Anonymous, 1958
Anonymous, X., Am. Pet. Inst. Res. Proj. 50, 1958, Unpublished, 1958. [all data]

Kanda, Otsubo, et al., 1950
Kanda, E.; Otsubo, A.; Haseda, T., Sci. Rep. Res. Inst., Tohoku Univ. Ser. A, 1950, 2, 9. [all data]

Wilhoit, Chao, et al., 1985
Wilhoit, R.C.; Chao, J.; Hall, K.R., Thermodynamic Properties of Key Organic Compounds in the Carbon Range C1 to C4. Part 1. Properties of Condensed Phases, J. Phys. Chem. Ref. Data, 1985, 14, 1. [all data]

Counsell, Lees, et al., 1968, 2
Counsell, J.F.; Lees, E.B.; Martin, J.F., Thermodynamic properties of organic oxygen compounds. Part XIX. Low-temperature heat capacity and entropy of propan-1-ol, 2-methylpropan-1-ol, and pentan-1-ol, J. Chem. Soc., A, 1968, 1819, https://doi.org/10.1039/j19680001819 . [all data]

Gude and Teja, 1995
Gude, M.; Teja, A.S., Vapor-Liquid Critical Properties of Elements and Compounds. 4. Aliphatic Alkanols, J. Chem. Eng. Data, 1995, 40, 1025-1036. [all data]

Ambrose and Townsend, 1963
Ambrose, D.; Townsend, R., Thermodynamic Properties of Organic Oxygen Compounds IX. The Critical Properties and Vapor Pressures Above Five Atmospheres of Six Aliphatic Alcohols, J. Chem. Soc., 1963, 54, 3614-25. [all data]

Kay and Donham, 1955
Kay, W.B.; Donham, W.E., Liquid-Vapor Equilibrium in the Isobutyl Alcohol-Butanol, Methanol- Butanol, and Diethyl Ether-Butanol Systems, Chem. Eng. Sci., 1955, 4, 1-16. [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]

Susial and Ortega, 1993
Susial, Pedro; Ortega, Juan, Isobaric vapor-liquid equilibria for methyl propanoate + isobutyl alcohol, J. Chem. Eng. Data, 1993, 38, 3, 434-436, https://doi.org/10.1021/je00011a028 . [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]

Ambrose, Counsell, et al., 1970
Ambrose, D.; Counsell, J.F.; Davenport, A.J., The use of Chebyshev polynomials for the representation of vapour pressures between the triple point and the critical point, The Journal of Chemical Thermodynamics, 1970, 2, 2, 283-294, https://doi.org/10.1016/0021-9614(70)90093-5 . [all data]

Majer, Svoboda, et al., 1984
Majer, V.; Svoboda, V.; Hynek, V., On the enthalpy of vaporization of isomeric butanols, J. Chem. Thermodyn., 1984, 16, 1059-1066. [all data]

Sachek, Peshchenko, et al., 1982
Sachek, A.I.; Peshchenko, A.D.; Markovnik, V.S.; Ral'ko, O.V.; Andreevskii, D.N.; Leont'eva, A.A., Termodin. Org. Soedin., 1982, 94. [all data]

Wilhoit and Zwolinski, 1973
Wilhoit, R.C.; Zwolinski, B.J., Physical and thermodynamic properties of aliphatic alcohols, J. Phys. Chem. Ref. Data Suppl., 1973, 1, 2, 1. [all data]

Counsell, Fenwick, et al., 1970
Counsell, J.F.; Fenwick, J.O.; Lees, E.B., Thermodynamic properties of organic oxygen compounds 24. Vapour heat capacities and enthalpies of vaporization of ethanol, 2-methylpropan-1-ol, and pentan-1-ol, The Journal of Chemical Thermodynamics, 1970, 2, 3, 367-372, https://doi.org/10.1016/0021-9614(70)90007-8 . [all data]

Brown, Fock, et al., 1969
Brown, I.; Fock, W.; Smith, F., The thermodynamic properties of solutions of normal and branched alcohols in benzene and n-hexane, The Journal of Chemical Thermodynamics, 1969, 1, 3, 273-291, https://doi.org/10.1016/0021-9614(69)90047-0 . [all data]

Boublik, Fried, et al., 1984
Boublik, T.; Fried, V.; Hala, E., The Vapour Pressures of Pure Substances: Selected Values of the Temperature Dependence of the Vapour Pressures of Some Pure Substances in the Normal and Low Pressure Region, 2nd ed., Elsevier, New York, 1984, 972. [all data]

Ambrose and Townsend, 1963, 2
Ambrose, D.; Townsend, R., 681. Thermodynamic properties of organic oxygen compounds. Part IX. The critical properties and vapour pressures, above five atmospheres, of six aliphatic alcohols, J. Chem. Soc., 1963, 3614, https://doi.org/10.1039/jr9630003614 . [all data]

Biddiscombe, Collerson, et al., 1963
Biddiscombe, D.P.; Collerson, R.R.; Handley, R.; Herington, E.F.G.; Martin, J.F.; Sprake, C.H.S., 364. Thermodynamic properties of organic oxygen compounds. Part VIII. Purification and vapour pressures of the propyl and butyl alcohols, J. Chem. Soc., 1963, 1954, https://doi.org/10.1039/jr9630001954 . [all data]

Ambrose and Townsend, 1963, 3
Ambrose, D.; Townsend, R., Thermodynamic Properties of Organic Oxygen Compounds. Part 9. The Critical Properties and Vapour Pressures, above Five Atmospheres, of Six Aliphatic Alcohols, J. Chem. Soc., 1963, 3614-3625, https://doi.org/10.1039/jr9630003614 . [all data]

Biddiscombe, Collerson, et al., 1963, 2
Biddiscombe, D.P.; Collerson, R.R.; Handley, R.; Herington, E.F.G.; Martin, J.F.; Sprake, C.H.S., Thermodynamic Properties of Organic Oxygen Compounds. Part 8. Purification and Vapor Pressures of the Propyl and Butyl Alcohols, J. Chem. Soc., 1963, 1954-1957, https://doi.org/10.1039/jr9630001954 . [all data]

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Haas, M.J.; Harrison, A.G., The Fragmentation of Proton-Bound Cluster Ions and the Gas-Phase Acidities of Alcohols, Int. J. Mass Spectrom. Ion Proc., 1993, 124, 2, 115, https://doi.org/10.1016/0168-1176(93)80003-W . [all data]

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Rodgers and Armentrout, 1999
Rodgers, M.T.; Armentrout, P.B., Absolute Binding Energies of Sodium Ions to Short-Chain Alcohols, CnH2n+2O, n=1-4, Determined by Threshold Collision-Induced Dissociation Experiments and Ab Initio Theory, 1999, 4955. [all data]

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Sharonov, K.G.; Mishentseva, Y.B.; Rozhnov, A.M.; Miroshnichenko, E.A.; Korchatova, L.I., Molar enthalpies of formation and vaporizqation of t-butoxybutanes and thermodynamics of their synthesis from a butanol and 2-methylpropene I. Equilibria of synthesis reactions of t-butoxybutanes in the liquid phase, J. Chem. Thermodyn., 1991, 23, 141-145. [all data]

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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]

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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]

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Peel, J.B.; Willett, G.D., Photoelectron spectroscopic studies of the higher alcohols, Aust. J. Chem., 1975, 28, 2357. [all data]

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Notes

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, References

• Symbols used in this document:
  

  AE	Appearance energy
  Cp,gas	Constant pressure heat capacity of gas
  Cp,liquid	Constant pressure heat capacity of liquid
  Cp,solid	Constant pressure heat capacity of solid
  IE (evaluated)	Recommended ionization energy
  Pc	Critical pressure
  S°gas	Entropy of gas at standard conditions
  S°liquid	Entropy of liquid at standard conditions
  S°solid,1 bar	Entropy of solid at standard conditions (1 bar)
  Tboil	Boiling point
  Tc	Critical temperature
  Tfus	Fusion (melting) point
  Ttriple	Triple point temperature
  Vc	Critical volume
  ΔcH°liquid	Enthalpy of combustion of liquid at standard conditions
  ΔfH°gas	Enthalpy of formation of gas at standard conditions
  ΔfH°liquid	Enthalpy of formation of liquid at standard conditions
  ΔfusH	Enthalpy of fusion
  ΔfusS	Entropy 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
  ρc	Critical density

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