Propanoic acid, 2,2-dimethyl-

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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

Quantity Value Units Method Reference Comment
Δfsolid-564.5 ± 5.9kJ/molCcbHancock, Watson, et al., 1954Reanalyzed by Cox and Pilcher, 1970, Original value = -565. kJ/mol; ALS
Quantity Value Units Method Reference Comment
Δcsolid-2832.1 ± 5.9kJ/molCcbHancock, Watson, et al., 1954Reanalyzed by Cox and Pilcher, 1970, Original value = -2830. kJ/mol; Corresponding Δfsolid = -564.55 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS

Constant pressure heat capacity of solid

Cp,solid (J/mol*K) Temperature (K) Reference Comment
192.2298.15Singh and Glicksman, 1990T = 295 to 319 K. Cp(c) = 13.38 + 0.1092T cal/mol*K (295 to 300 K). Cp value calculated from equation. Cp(liq) = 16.19 + 0.1042T cal/mol*K.; DH
178.298.15Konicek and Wadso, 1971DH

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
DH - Eugene S. Domalski and Elizabeth D. Hearing

Quantity Value Units Method Reference Comment
Tboil436. ± 3.KAVGN/AAverage of 27 out of 32 values; Individual data points
Quantity Value Units Method Reference Comment
Tfus308. ± 3.KAVGN/AAverage of 9 values; Individual data points
Quantity Value Units Method Reference Comment
Δsub73.2 ± 3.0kJ/molVKruif and Oonk, 1979ALS

Enthalpy of vaporization

ΔvapH (kJ/mol) Temperature (K) Method Reference Comment
57.6 ± 0.2320.EBSteele, Chirico, et al., 2002Based on data from 344. - 472. K.; AC
54.4 ± 0.2360.EBSteele, Chirico, et al., 2002Based on data from 344. - 472. K.; AC
50.9 ± 0.2400.EBSteele, Chirico, et al., 2002Based on data from 344. - 472. K.; AC
47.0 ± 0.4440.EBSteele, Chirico, et al., 2002Based on data from 344. - 472. K.; AC

Enthalpy of sublimation

ΔsubH (kJ/mol) Temperature (K) Method Reference Comment
62.3291.GSVerevkin, 2000AC

Enthalpy of fusion

ΔfusH (kJ/mol) Temperature (K) Reference Comment
2.3309.1Steele, Chirico, et al., 2002AC
2.27309.1Singh and Glicksman, 1990AC

Enthalpy of phase transition

ΔHtrs (kJ/mol) Temperature (K) Initial Phase Final Phase Reference Comment
8.760281.crystaline, IIcrystaline, IMurrill and Breed, 1970DH
2.479307.crystaline, IliquidMurrill and Breed, 1970DH
8.184278.3crystaline, IIcrystaline, ISingh and Glicksman, 1990DH
2.268309.085crystaline, IliquidSingh and Glicksman, 1990DH

Entropy of phase transition

ΔStrs (J/mol*K) Temperature (K) Initial Phase Final Phase Reference Comment
31.4281.crystaline, IIcrystaline, IMurrill and Breed, 1970DH
7.9307.crystaline, IliquidMurrill and Breed, 1970DH

In addition to the Thermodynamics Research Center (TRC) data available from this site, much more physical and chemical property data is available from the following TRC products:


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
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

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

C5H9O2- + Hydrogen cation = Propanoic acid, 2,2-dimethyl-

By formula: C5H9O2- + H+ = C5H10O2

Quantity Value Units Method Reference Comment
Δr1442. ± 8.8kJ/molG+TSCaldwell, Renneboog, et al., 1989gas phase; B
Δr1443. ± 8.8kJ/molG+TSJinfeng, Topsom, et al., 1988gas phase; value altered from reference due to change in acidity scale; B
Quantity Value Units Method Reference Comment
Δr1413. ± 8.4kJ/molIMRECaldwell, Renneboog, et al., 1989gas phase; B
Δr1414. ± 8.4kJ/molIMREJinfeng, Topsom, et al., 1988gas phase; value altered from reference due to change in acidity scale; B

Iodide + Propanoic acid, 2,2-dimethyl- = (Iodide • Propanoic acid, 2,2-dimethyl-)

By formula: I- + C5H10O2 = (I- • C5H10O2)

Quantity Value Units Method Reference Comment
Δr64.4 ± 4.2kJ/molTDAsCaldwell and Kebarle, 1984gas phase; B,M
Quantity Value Units Method Reference Comment
Δr90.8J/mol*KPHPMSCaldwell and Kebarle, 1984gas phase; M
Quantity Value Units Method Reference Comment
Δr37. ± 4.2kJ/molTDAsCaldwell and Kebarle, 1984gas phase; B

2,2-Dimethylpropanoic anhydride + Water = 2Propanoic acid, 2,2-dimethyl-

By formula: C10H18O3 + H2O = 2C5H10O2

Quantity Value Units Method Reference Comment
Δr-63.26kJ/molCmConn, Kistiakowsky, et al., 1942liquid phase; Heat of hydrolysis at 303 K; ALS

Henry's Law 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: Rolf Sander

Henry's Law constant (water solution)

kH(T) = H exp(d(ln(kH))/d(1/T) ((1/T) - 1/(298.15 K)))
H = Henry's law constant for solubility in water at 298.15 K (mol/(kg*bar))
d(ln(kH))/d(1/T) = Temperature dependence constant (K)

H (mol/(kg*bar)) d(ln(kH))/d(1/T) (K) Method Reference
350. MN/A

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 compiled as indicated in comments:
B - John E. Bartmess
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi

Ionization energy determinations

IE (eV) Method Reference Comment
10.08EIHolmes, Fingas, et al., 1981LLK
10.3PEGreen and Hayes, 1975Vertical value; LLK

De-protonation reactions

C5H9O2- + Hydrogen cation = Propanoic acid, 2,2-dimethyl-

By formula: C5H9O2- + H+ = C5H10O2

Quantity Value Units Method Reference Comment
Δr1442. ± 8.8kJ/molG+TSCaldwell, Renneboog, et al., 1989gas phase; B
Δr1443. ± 8.8kJ/molG+TSJinfeng, Topsom, et al., 1988gas phase; value altered from reference due to change in acidity scale; B
Quantity Value Units Method Reference Comment
Δr1413. ± 8.4kJ/molIMRECaldwell, Renneboog, et al., 1989gas phase; B
Δr1414. ± 8.4kJ/molIMREJinfeng, Topsom, et al., 1988gas phase; value altered from reference due to change in acidity scale; B

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 as indicated in comments:
B - John E. Bartmess
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias

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

Iodide + Propanoic acid, 2,2-dimethyl- = (Iodide • Propanoic acid, 2,2-dimethyl-)

By formula: I- + C5H10O2 = (I- • C5H10O2)

Quantity Value Units Method Reference Comment
Δr64.4 ± 4.2kJ/molTDAsCaldwell and Kebarle, 1984gas phase; B,M
Quantity Value Units Method Reference Comment
Δr90.8J/mol*KPHPMSCaldwell and Kebarle, 1984gas phase; M
Quantity Value Units Method Reference Comment
Δr37. ± 4.2kJ/molTDAsCaldwell and Kebarle, 1984gas phase; B

IR Spectrum

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

Gas Phase Spectrum

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Additional Data

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Owner NIST Standard Reference Data Program
Collection (C) 2018 copyright by the U.S. Secretary of Commerce
on behalf of the United States of America. All rights reserved.
Origin Sadtler Research Labs Under US-EPA Contract
State gas

This IR spectrum is from the NIST/EPA Gas-Phase Infrared Database .


Mass spectrum (electron ionization)

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

Spectrum

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Mass spectrum
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Additional Data

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Due to licensing restrictions, this spectrum cannot be downloaded.

Owner NIST Mass Spectrometry Data Center
Collection (C) 2014 copyright by the U.S. Secretary of Commerce
on behalf of the United States of America. All rights reserved.
Origin Japan AIST/NIMC Database- Spectrum MS-NW-1453
NIST MS number 229708

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References

Go To: Top, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, Mass spectrum (electron ionization), Notes

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

Hancock, Watson, et al., 1954
Hancock, C.K.; Watson, G.M.; Gilby, R.F., Heats of combustion of five-carbon fatty acids and their methyl and ethyl esters, J. Phys. Chem., 1954, 58, 127-129. [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]

Singh and Glicksman, 1990
Singh, N.B.; Glicksman, M.E., Physical properties of ultra-pure pivalic acid, Thermochim. Acta, 1990, 159, 93-99. [all data]

Konicek and Wadso, 1971
Konicek, J.; Wadso, I., Thermochemical properties of some carboxylic acids, amines and N-substituted amides in aqueous solution, Acta Chem. Scand., 1971, 25, 1541-1551. [all data]

Kruif and Oonk, 1979
Kruif, C.G.; Oonk, H.A.J., Enthalpies of vaporization and vapour pressures of seven aliphatic carboxylic acids, J. Chem. Thermodyn., 1979, 11, 287-290. [all data]

Steele, Chirico, et al., 2002
Steele, W.V.; Chirico, R.D.; Cowell, A.B.; Knipmeyer, S.E.; Nguyen, A., Thermodynamic Properties and Ideal-Gas Enthalpies of Formation for trans -Methyl Cinnamate, α-Methyl Cinnamaldehyde, Methyl Methacrylate, 1-Nonyne, Trimethylacetic Acid, Trimethylacetic Anhydride, and Ethyl Trimethyl Acetate, J. Chem. Eng. Data, 2002, 47, 4, 700-714, https://doi.org/10.1021/je010086r . [all data]

Verevkin, 2000
Verevkin, S.P., Measurement and Prediction of the Monocarboxylic Acids Thermochemical Properties, J. Chem. Eng. Data, 2000, 45, 5, 953-960, https://doi.org/10.1021/je990282m . [all data]

Murrill and Breed, 1970
Murrill, E.; Breed, L., Solid-solid phase transitions determined by differential scanning calorimetry, Thermochim. Acta, 1970, 1, 239-246. [all data]

Caldwell, Renneboog, et al., 1989
Caldwell, G.; Renneboog, R.; Kebarle, P., Gas Phase Acidities of Aliphatic Carboxylic Acids, Based on Measurements of Proton Transfer Equilibria, Can. J. Chem., 1989, 67, 4, 661, https://doi.org/10.1139/v89-092 . [all data]

Jinfeng, Topsom, et al., 1988
Jinfeng, C.; Topsom, R.D.; Headley, A.D.; Koppel, I.; Mishima, M.; Taft, R.W.; Veji, S., Acidities of Substituted Acetic Acids, J. Mol. Struct., 1988, 168, 141, https://doi.org/10.1016/0166-1280(88)80349-X . [all data]

Caldwell and Kebarle, 1984
Caldwell, G.; Kebarle, P., Binding energies and structural effects in halide anion-ROH and -RCOOH complexes from gas phase equilibria measurements, J. Am. Chem. Soc., 1984, 106, 967. [all data]

Conn, Kistiakowsky, et al., 1942
Conn, J.B.; Kistiakowsky, G.B.; Roberts, R.M.; Smith, E.A., Heats of organic reactions. XIII. Heats of hydrolysis of some acid anhydrides, J. Am. Chem. Soc., 1942, 64, 1747-17. [all data]

Holmes, Fingas, et al., 1981
Holmes, J.L.; Fingas, M.; Lossing, F.P., Towards a general scheme for estimating the heats of formation of organic ions in the gas phase. Part I. Odd-electron cations, Can. J. Chem., 1981, 59, 80. [all data]

Green and Hayes, 1975
Green, J.C.; Hayes, A.J., Ionization energies of an Mo-Mo quadruple bond; a He(I) photoelectron study of some molybdenum-dycarboxylate dimers, Chem. Phys. Lett., 1975, 31, 306. [all data]


Notes

Go To: Top, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, Mass spectrum (electron ionization), References