Acetic acid

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Condensed phase thermochemistry data

Go To: Top, Phase change data, Henry's Law data, Gas phase ion energetics data, 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:
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
Δfliquid-483.52 ± 0.36kJ/molCcbSteele, Chirico, et al., 1997ALS
Δfliquid-484.5 ± 0.2kJ/molCcbLebedeva, 1964ALS
Δfliquid-484.1 ± 0.4kJ/molCcbEvans and Skinner, 1959ALS
Δfliquid-487.0kJ/molCmCarson and Skinner, 1949Unpublished result by Rossini; ALS
Quantity Value Units Method Reference Comment
Δcliquid-875.16 ± 0.34kJ/molCcbSteele, Chirico, et al., 1997Corresponding Δfliquid = -483.52 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS
Δcliquid-874.2 ± 0.2kJ/molCcbLebedeva, 1964Corresponding Δfliquid = -484.47 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS
Δcliquid-874.5 ± 0.4kJ/molCcbEvans and Skinner, 1959Corresponding Δfliquid = -484.1 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS
Δcliquid-872.4kJ/molCcbSchjanberg, 1935Corresponding Δfliquid = -486.2 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS
Quantity Value Units Method Reference Comment
liquid158.0J/mol*KN/AMartin and Andon, 1982DH
liquid193.7J/mol*KN/AParks and Kelley, 1925Extrapolation below 90 K. 76.82 J/mol*K.; DH

Constant pressure heat capacity of liquid

Cp,liquid (J/mol*K) Temperature (K) Reference Comment
123.1298.15Martin and Andon, 1982T = 13 to 450 K. Data also given by equation.; DH
139.7332.Swietoslawski and Zielenkiewicz, 1958Mean value 22 to 96°C.; DH
120.5298.Radulescu and Jula, 1934DH
121.3297.1Neumann, 1932T = 23.9 to 80.5°C. Value is unsmoothed experimental datum.; DH
159.8298.1Parks, Kelley, et al., 1929Extrapolation below 90 K, 42.68 J/mol*K. Revision of previous data.; DH
123.4294.7Parks and Kelley, 1925T = 87 to 295 K. Value is unsmoothed experimental datum.; DH
137.287. to 335.Pickering, 1895T = 260 to 335 K.; DH
123.5298.von Reis, 1881T = 292 to 358 K.; DH

Phase change data

Go To: Top, Condensed phase thermochemistry data, Henry's Law data, Gas phase ion energetics data, 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
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
Tboil391.2 ± 0.6KAVGN/AAverage of 80 out of 90 values; Individual data points
Quantity Value Units Method Reference Comment
Tfus289.6 ± 0.5KAVGN/AAverage of 8 values; Individual data points
Quantity Value Units Method Reference Comment
Ttriple289.8KN/AWilhoit, Chao, et al., 1985Uncertainty assigned by TRC = 0.05 K; TRC
Ttriple289.69KN/AMartin and Andon, 1982, 2Uncertainty assigned by TRC = 0.04 K; TRC
Ttriple289.8KN/AParks and Kelley, 1925, 2Uncertainty assigned by TRC = 0.15 K; TRC
Quantity Value Units Method Reference Comment
Tc593. ± 3.KAVGN/AAverage of 10 values; Individual data points
Quantity Value Units Method Reference Comment
Pc57.81barN/AAndereya and Chase, 1990Uncertainty assigned by TRC = 0.20 bar; TRC
Pc58.2901barN/AD'Souza and Teja, 1987Uncertainty assigned by TRC = 0.90 bar; Ambrose's procedure; TRC
Pc57.86barN/AAmbrose, Ellender, et al., 1977Uncertainty assigned by TRC = 0.08 bar; TRC
Pc57.87barN/AYoung, 1910Uncertainty assigned by TRC = 1.0132 bar; TRC
Pc57.867barN/AYoung, 1891Uncertainty assigned by TRC = 0.2666 bar; TRC
Quantity Value Units Method Reference Comment
ρc5.84mol/lN/AVandana and Teja, 1995Uncertainty assigned by TRC = 0.02 mol/l; TRC
ρc5.838mol/lN/AYoung, 1910Uncertainty assigned by TRC = 0.02 mol/l; TRC
Quantity Value Units Method Reference Comment
Δvap50.3kJ/molCGCVerevkin, 2000Based on data from 303. to 378. K.; AC
Δvap51.6kJ/molN/AMajer and Svoboda, 1985 
Δvap51.6 ± 1.5kJ/molCKonicek and Wadso, 1970ALS
Δvap51.6 ± 1.6kJ/molCKonicek, Wadsö, et al., 1970AC

Enthalpy of vaporization

ΔvapH (kJ/mol) Temperature (K) Method Reference Comment
23.7391.1N/AMajer and Svoboda, 1985 
39.1360.EBMuñoz and Krähenbühl, 2001Based on data from 345. to 383. K.; AC
40.9335.N/AVercher, Vázquez, et al., 2001Based on data from 320. to 395. K.; AC
37.9406.AStephenson and Malanowski, 1987Based on data from 391. to 550. K.; AC
42.0305.AStephenson and Malanowski, 1987Based on data from 290. to 396. K.; AC
38.7406.AStephenson and Malanowski, 1987Based on data from 391. to 447. K.; AC
38.1452.AStephenson and Malanowski, 1987Based on data from 437. to 535. K.; AC
38.8540.AStephenson and Malanowski, 1987Based on data from 525. to 593. K.; AC
41.6304.AStephenson and Malanowski, 1987Based on data from 289. to 392. K. See also Dykyj, 1970.; AC
43.0308.N/ATamir, Dragoescu, et al., 1983AC
40.3340.N/AMcDonald, Shrader, et al., 1959Based on data from 325. to 391. K.; AC
41.6318.MMPotter and Ritter, 1954Based on data from 303. to 399. K.; AC

Enthalpy of vaporization

ΔvapH = A exp(-αTr) (1 − Tr)β
    ΔvapH = Enthalpy of vaporization (at saturation pressure) (kJ/mol)
    Tr = reduced temperature (T / Tc)

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Temperature (K) 298. to 392.
A (kJ/mol) 22.84
α 0.0184
β -0.0454
Tc (K) 592.7
ReferenceMajer and Svoboda, 1985

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.

Temperature (K) A B C Reference
290.26 to 391.014.682061642.54-39.764McDonald, Shrader, et al., 1959

Enthalpy of sublimation

ΔsubH (kJ/mol) Temperature (K) Method Reference Comment
67. ± 1.223.TE,MECalis-Van Ginkel, Calis, et al., 1978Based on data from 213. to 230. K.; AC
70. ± 1.213.TE,MECalis-Van Ginkel, Calis, et al., 1978Based on data from 213. to 230. K.; AC

Enthalpy of fusion

ΔfusH (kJ/mol) Temperature (K) Reference Comment
11.72298.7Domalski and Hearing, 1996See also Martin and Andon, 1982.; AC
11.728289.9Parks and Kelley, 1925DH
10.83289.8Louguinine and Dupont, 1911AC
11.52283.7Meyer, 1910AC
11.126290.06Pickering, 1895DH

Entropy of fusion

ΔfusS (J/mol*K) Temperature (K) Reference Comment
40.47289.9Parks and Kelley, 1925DH
38.36290.06Pickering, 1895DH

Enthalpy of phase transition

ΔHtrs (kJ/mol) Temperature (K) Initial Phase Final Phase Reference Comment
11.720298.69crystaline, IliquidMartin and Andon, 1982DH

Entropy of phase transition

ΔStrs (J/mol*K) Temperature (K) Initial Phase Final Phase Reference Comment
40.5298.69crystaline, IliquidMartin and Andon, 1982DH

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:


Henry's Law data

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

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 Comment
4100.6300.MN/A 
5200. CN/A 
5400.6300.QN/A 
5200. CN/A 
8600. CN/A 
5500. MN/A 
820. QN/A missing citation give several references for the Henry's law constants but don't assign them to specific species.
9300. MN/AThe value given here was measured at a liquid phase volume mixing ratio of 1 ppmv. missing citation found that the Henry's law constant changes at higher concentrations.
8800.6400.TN/A 
 6400.TN/A 
8800. TN/A 
10000. XN/AValue given here as quoted by missing citation.
970.4900.XN/A 
3300. QN/A 
3400. cN/A 

Gas phase ion energetics data

Go To: Top, Condensed phase thermochemistry data, Phase change data, Henry's Law data, References, Notes

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
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
LL - Sharon G. Lias and Joel F. Liebman

View reactions leading to C2H4O2+ (ion structure unspecified)

Quantity Value Units Method Reference Comment
IE (evaluated)10.65 ± 0.02eVN/AN/AL
Quantity Value Units Method Reference Comment
Proton affinity (review)783.7kJ/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity752.8kJ/molN/AHunter and Lias, 1998HL

Ionization energy determinations

IE (eV) Method Reference Comment
10.63PITraeger, McLouglin, et al., 1982LBLHLM
10.66EIHolmes, Fingas, et al., 1981LLK
10.66 ± 0.05EIHolmes and Lossing, 1980LLK
10.66EIHolmes and Lossing, 1980, 2LLK
10.66 ± 0.05PIAkopyan and Villem, 1976LLK
10.664 ± 0.003PIWatanabe, Yokoyama, et al., 1974LLK
10.644 ± 0.002PIKnowles and Nicholson, 1974LLK
10.65PEWatanabe, Yokoyama, et al., 1973LLK
10.69 ± 0.03PEThomas, 1972LLK
10.70PESweigart and Turner, 1972LLK
10.37 ± 0.03PIWatanabe, Nakayama, et al., 1962RDSH
10.38 ± 0.03PIVilesov, 1960RDSH
10.35 ± 0.03PIWatanabe, 1957RDSH
10.9PEVon Niessen, Bieri, et al., 1980Vertical value; LLK
10.84PECarnovale, Gan, et al., 1980Vertical value; LLK
10.63PEBenoit and Harrison, 1977Vertical value; LLK
11.5PERao, 1975Vertical value; LLK
10.87PEKimura, Katsumata, et al., 1975Vertical value; LLK
10.8PEGreen and Hayes, 1975Vertical value; LLK

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
C+22.0 ± 0.5H2+HCOOHEIStepanov, Perov, et al., 1988LL
CHO2+12.27 ± 0.05CH3EIHaney and Franklin, 1969RDSH
CHO2+12.9 ± 0.1CH3EIShigorin, Filyugina, et al., 1966RDSH
CH3+14.0 ± 0.15?EIHaney and Franklin, 1969RDSH
CH3O+12.05 ± 0.10CHOEISelim and Helal, 1981LLK
CO+15.3 ± 0.1CH3OHEIShigorin, Filyugina, et al., 1966RDSH
C2H3O+11.54OHPITraeger, McLouglin, et al., 1982LBLHLM
C2H3O+11.75OHEIHaney and Franklin, 1969RDSH
C2H3O+11.4 ± 0.15OHEIShigorin, Filyugina, et al., 1966RDSH
OH+15.1?EIMajer, Patrick, et al., 1961RDSH

De-protonation reactions

MeCO2 anion + Hydrogen cation = Acetic acid

By formula: C2H3O2- + H+ = C2H4O2

Quantity Value Units Method Reference Comment
Δr1457. ± 5.9kJ/molCIDCAngel and Ervin, 2006gas phase; B
Δr1456. ± 9.2kJ/molG+TSTaft and Topsom, 1987gas phase; B
Δr1459. ± 8.8kJ/molG+TSCumming and Kebarle, 1978gas phase; B
Δr1459. ± 9.2kJ/molG+TSFujio, McIver, et al., 1981gas phase; value altered from reference due to change in acidity scale; B
Δr1435.9 ± 2.9kJ/molEIAEMuftakhov, Vasil'ev, et al., 1999gas phase; B
Quantity Value Units Method Reference Comment
Δr1427. ± 8.4kJ/molIMRETaft and Topsom, 1987gas phase; B
Δr1429. ± 8.4kJ/molIMRECumming and Kebarle, 1978gas phase; B
Δr1430. ± 8.4kJ/molIMREFujio, McIver, et al., 1981gas phase; value altered from reference due to change in acidity scale; B

C2H3O2- + Hydrogen cation = Acetic acid

By formula: C2H3O2- + H+ = C2H4O2

Quantity Value Units Method Reference Comment
Δr1540. ± 13.kJ/molG+TSGrabowski and Cheng, 1989gas phase; B
Δr1539. ± 19.kJ/molEIAEMuftakhov, Vasil'ev, et al., 1999gas phase; B
Quantity Value Units Method Reference Comment
Δr1511. ± 13.kJ/molIMRBGrabowski and Cheng, 1989gas phase; B

References

Go To: Top, Condensed phase thermochemistry data, Phase change data, Henry's Law 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.

Steele, Chirico, et al., 1997
Steele, W.V.; Chirico, R.D.; Cowell, A.B.; Knipmeyer, S.E.; Nguyen, A., Thermodynamic properties and ideal-gas enthalpies of formation for 2-aminoisobutyric acid (2-methylalanine), acetic acid, (4-methyl-3-penten-2-one), 4-methylpent-1-ene, 2,2'-bis(phenylthio)propane, and glycidyl phenyl ether (1,2-epoxy-3-phenoxypropane), J. Chem. Eng. Data, 1997, 42, 1052-1066. [all data]

Lebedeva, 1964
Lebedeva, N.D., Heats of combustion of monocarboxylic acids, Russ. J. Phys. Chem. (Engl. Transl.), 1964, 38, 1435-1437. [all data]

Evans and Skinner, 1959
Evans, F.W.; Skinner, H.A., The heat of combustion of acetic acid, Trans. Faraday Soc., 1959, 55, 260-261. [all data]

Carson and Skinner, 1949
Carson, A.S.; Skinner, H.A., 201. Carbon-halogen bond energies in the acetyl halides, J. Chem. Soc., 1949, 936-939. [all data]

Schjanberg, 1935
Schjanberg, E., Die Verbrennungswarmen und die Refraktionsdaten einiger chlorsubstituierter Fettsauren und Ester., Z. Phys. Chem. Abt. A, 1935, 172, 197-233. [all data]

Martin and Andon, 1982
Martin, J.F.; Andon, R.J.L., Thermodynamic properties of organic oxygen compounds. Part LII. Molar heat capacity of ethanoic, propanoic, and butanoic acids, J. Chem. Thermodynam., 1982, 14, 679-688. [all data]

Parks and Kelley, 1925
Parks, G.S.; Kelley, K.K., Thermal data on organic compounds. II. The heat capacities of five organic compounds. The entropies and free energies of some homologous series of aliphatic compounds, J. Am. Chem. Soc., 1925, 47, 2089-2097. [all data]

Swietoslawski and Zielenkiewicz, 1958
Swietoslawski, W.; Zielenkiewicz, A., Mean specific heat of some ternary azeotropes, Bull. Acad. Pol. Sci. Ser. Sci. Chim., 1958, 6, 365-366. [all data]

Radulescu and Jula, 1934
Radulescu, D.; Jula, O., Beiträge zur Bestimmung der Abstufung der Polarität des Aminstickstoffes in den organischen Verbindungen, Z. Phys. Chem., 1934, B26, 390-393. [all data]

Neumann, 1932
Neumann, M.B., Die Untersuchung der Wärmekapazität vom binären System CH3COOH + H2O bei verschiedenen Temperaturen, Z. Phys. Chem., 1932, A158, 258-264. [all data]

Parks, Kelley, et al., 1929
Parks, G.S.; Kelley, K.K.; Huffman, H.M., Thermal data on organic compounds. V. A revision of the entropies and free energies of nineteen organic compounds, J. Am. Chem. Soc., 1929, 51, 1969-1973. [all data]

Pickering, 1895
Pickering, S.U., A comparison of some properties of acetic acid and its chloro- and bromo-derivatives, J. Chem. Soc., 1895, 67, 664-684. [all data]

von Reis, 1881
von Reis, M.A., Die specifische Wärme flüssiger organischer Verbindungen und ihre Beziehung zu deren Moleculargewicht, Ann. Physik [3], 1881, 13, 447-464. [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]

Martin and Andon, 1982, 2
Martin, J.F.; Andon, R.J.L., Thermodynamic properties of organic oxygen compounds. Part LII. Molar heat capacity of ethanoic, propanoic, and butanoic acids., J. Chem. Thermodyn., 1982, 14, 679-88. [all data]

Parks and Kelley, 1925, 2
Parks, G.S.; Kelley, K.K., Thermal Data on Organic Compounds II. The Heat Capacities of Five Organic Compounds. The Entropies and Free Energies of Some Homologous Series of Aliphatic Compounds, J. Am. Chem. Soc., 1925, 47, 2089-97. [all data]

Andereya and Chase, 1990
Andereya, E.; Chase, J.D., Chem. Eng. Technol., 1990, 13, 304-12. [all data]

D'Souza and Teja, 1987
D'Souza, R.; Teja, A.S., The prediction of the vapor pressures of carboxylic acids, Chem. Eng. Commun., 1987, 61, 13. [all data]

Ambrose, Ellender, et al., 1977
Ambrose, D.; Ellender, J.H.; Sprake, C.H.S.; Townsend, R., Thermo. Prop. of Org. Oxygen Compounds XLV. The Vapor Pressure of Acetic Acid, J. Chem. Thermodyn., 1977, 9, 735. [all data]

Young, 1910
Young, S., The Internal Heat of Vaporization constants of thirty pure substances, Sci. Proc. R. Dublin Soc., 1910, 12, 374. [all data]

Young, 1891
Young, S., J. Chem. Soc., 1891, 59, 903. [all data]

Vandana and Teja, 1995
Vandana, V.; Teja, A.S., The critical temperatures and densities of acetic acid-water mixtures, Fluid Phase Equilib., 1995, 103, 113-18. [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]

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]

Konicek and Wadso, 1970
Konicek, J.; Wadso, I., Enthalpies of vaporization of organic compounds. VII. Some carboxylic acids, Acta Chem. Scand., 1970, 24, 2612-26. [all data]

Konicek, Wadsö, et al., 1970
Konicek, Jiri; Wadsö, Ingemar; Munch-Petersen, J.; Ohlson, Ragnar; Shimizu, Akira, Enthalpies of Vaporization of Organic Compounds. VII. Some Carboxylic Acids., Acta Chem. Scand., 1970, 24, 2612-2616, https://doi.org/10.3891/acta.chem.scand.24-2612 . [all data]

Muñoz and Krähenbühl, 2001
Muñoz, Laura A.L.; Krähenbühl, M. Alvina, Isobaric Vapor Liquid Equilibrium (VLE) Data of the Systems n -Butanol + Butyric Acid and n -Butanol + Acetic Acid, J. Chem. Eng. Data, 2001, 46, 1, 120-124, https://doi.org/10.1021/je000033u . [all data]

Vercher, Vázquez, et al., 2001
Vercher, Ernesto; Vázquez, M. Isabel; Martínez-Andreu, Antoni, Isobaric Vapor-Liquid Equilibria for Water + Acetic Acid + Lithium Acetate, J. Chem. Eng. Data, 2001, 46, 6, 1584-1588, https://doi.org/10.1021/je010106p . [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]

Dykyj, 1970
Dykyj, J., Petrochemica, 1970, 10, 2, 51. [all data]

Tamir, Dragoescu, et al., 1983
Tamir, Abraham; Dragoescu, Claudia; Apelblat, Alexander; Wisniak, Jaime, Heats of vaporization and vapor-liquid equilibria in associated solutions containing formic acid, acetic acid, propionic acid and carbon tetrachloride, Fluid Phase Equilibria, 1983, 10, 1, 9-42, https://doi.org/10.1016/0378-3812(83)80002-8 . [all data]

McDonald, Shrader, et al., 1959
McDonald, R.A.; Shrader, S.A.; Stull, D.R., Vapor Pressures and Freezing Points of Thirty Pure Organic Compounds., J. Chem. Eng. Data, 1959, 4, 4, 311-313, https://doi.org/10.1021/je60004a009 . [all data]

Potter and Ritter, 1954
Potter, Andrew E.; Ritter, H.L., The Vapor Pressure of Acetic Acid and Acetic-d 3 Acid-d. The Liquid Density of Acetic-d 3 Acid-d, J. Phys. Chem., 1954, 58, 11, 1040-1042, https://doi.org/10.1021/j150521a025 . [all data]

Calis-Van Ginkel, Calis, et al., 1978
Calis-Van Ginkel, C.H.D.; Calis, G.H.M.; Timmermans, C.W.M.; de Kruif, C.G.; Oonk, H.A.J., Enthalpies of sublimation and dimerization in the vapour phase of formic, acetic, propanoic, and butanoic acids, The Journal of Chemical Thermodynamics, 1978, 10, 11, 1083-1088, https://doi.org/10.1016/0021-9614(78)90082-4 . [all data]

Domalski and Hearing, 1996
Domalski, Eugene S.; Hearing, Elizabeth D., Heat Capacities and Entropies of Organic Compounds in the Condensed Phase. Volume III, J. Phys. Chem. Ref. Data, 1996, 25, 1, 1, https://doi.org/10.1063/1.555985 . [all data]

Louguinine and Dupont, 1911
Louguinine, W.; Dupont, G., Bull. Soc. Chim. Fr., 1911, 9, 219. [all data]

Meyer, 1910
Meyer, J., Z. Phys. Chem., Stoechiom. Verwandtschaftsl., 1910, 72, 225. [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]

Traeger, McLouglin, et al., 1982
Traeger, J.C.; McLouglin, R.G.; Nicholson, A.J.C., Heat of formation for acetyl cation in the gas phase, J. Am. Chem. Soc., 1982, 104, 5318. [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]

Holmes and Lossing, 1980
Holmes, J.L.; Lossing, F.P., Thermochemistry and unimolecular reactions of ionized acetic acid and its enol in the gas phase., J. Am. Chem. Soc., 1980, 102, 3732. [all data]

Holmes and Lossing, 1980, 2
Holmes, J.L.; Lossing, F.P., Gas-phase heats of formation of keto and enol ions of carbonyl compounds., J. Am. Chem. Soc., 1980, 102, 1591. [all data]

Akopyan and Villem, 1976
Akopyan, M.E.; Villem, Ya.Ya., Ion-molecule reactions in the photoionization of formic and acetic acid vapors, High Energy Chem., 1976, 10, 24. [all data]

Watanabe, Yokoyama, et al., 1974
Watanabe, I.; Yokoyama, Y.; Ikeda, S., Vibrational structures in the He(I) photoelectron spectra of carboxylic acids, Bull. Chem. Soc. Jpn., 1974, 47, 627. [all data]

Knowles and Nicholson, 1974
Knowles, D.J.; Nicholson, A.J.C., Ionization energies of formic and acetic acid monomers, J. Chem. Phys., 1974, 60, 1180. [all data]

Watanabe, Yokoyama, et al., 1973
Watanabe, I.; Yokoyama, Y.; Ikeda, S., Lone pair ionization potentials of carboxylic acids determined by He(I) photoelectron spectroscopy, Bull. Chem. Soc. Jpn., 1973, 46, 1959. [all data]

Thomas, 1972
Thomas, R.K., Photoelectron spectroscopy of hydrogen-bonded systems: spectra of monomers, dimers and mixed complexes of carboxylic acides, Proc. R. Soc. London A:, 1972, 331, 249. [all data]

Sweigart and Turner, 1972
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Notes

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