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Ketene

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Gas phase thermochemistry data

Go To: Top, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering data, Mass spectrum (electron ionization), 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
GT - Glushko Thermocenter, Russian Academy of Sciences, Moscow

Quantity Value Units Method Reference Comment
Deltafgas-20.85kcal/molIonOrlov, Krivoruchko, et al., 1986Author was aware that data differs from previously reported values; ALS
Deltafgas-11.4 ± 0.4kcal/molCmNuttall, Laufer, et al., 1971ALS
Deltafgas-14.78kcal/molCmRice and Greenberg, 1934ALS

Constant pressure heat capacity of gas

Cp,gas (cal/mol*K) Temperature (K) Reference Comment
7.94950.Thermodynamics Research Center, 1997p=1 bar. Selected entropies and heat capacities are in excellent agreement with statistically calculated values [ Cox A.P., 1963, Moore C.B., 1963] and value of S(298.15 K) calculated by ab initio method [ East A.L.L., 1997]. Maximum discrepancies with earlier calculations [ Drayton L.G., 1948, Sundaram S., 1960] amount to 6 and 4 J/mol*K for S(T) and Cp(T), respectively. S(T) values calculated by [ Zhuravlev E.Z., 1959] are 11-13 J/mol*K lower than recommended ones.; GT
8.181100.
9.063150.
10.22200.
11.85273.15
12.37298.15
12.41300.
14.22400.
15.68500.
16.89600.
17.91700.
18.80800.
19.57900.
20.251000.
20.841100.
21.361200.
21.811300.
22.211400.
22.551500.

Phase change data

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering data, Mass spectrum (electron ionization), 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
AC - William E. Acree, Jr., James S. Chickos

Quantity Value Units Method Reference Comment
Deltavap4.9 ± 1.4kcal/molVReuben, 1969ALS

Enthalpy of vaporization

DeltavapH (kcal/mol) Temperature (K) Method Reference Comment
4.88 ± 0.02209.A,MMStephenson and Malanowski, 1987Based on data from 159. - 224. K. See also Reuben, 1969, 2.; AC

Antoine Equation Parameters

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

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Temperature (K) A B C Reference Comment
159.3 - 223.803.97151766.685-30.609Reuben, 1969, 2Coefficents calculated by NIST from author's data.

Reaction thermochemistry data

Go To: Top, Gas phase thermochemistry data, Phase change data, Gas phase ion energetics data, Ion clustering data, Mass spectrum (electron ionization), 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:
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

(CAS Reg. No. 77213-00-4 bullet 4294967295Ketene) + Ketene = CAS Reg. No. 77213-00-4

By formula: (CAS Reg. No. 77213-00-4 bullet 4294967295C2H2O) + C2H2O = CAS Reg. No. 77213-00-4

Quantity Value Units Method Reference Comment
Deltar43.2 ± 3.9kcal/molN/AMarks, Brauman, et al., 1988gas phase; B
Deltar44.7 ± 3.9kcal/molTherFarid and McMahon, 1980gas phase; Between MeCOCH2F, cyclopentadiene; value altered from reference due to change in acidity scale; B
Deltar44.5 ± 3.9kcal/molN/AWenthold and Squires, 1995gas phase; Re-evaluation of literature thermo cycle; B
Deltar35.3 ± 2.0kcal/molIMRELarson and McMahon, 1983gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B
Quantity Value Units Method Reference Comment
Deltar27.4 ± 2.0kcal/molIMRELarson and McMahon, 1983gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B

Fluorine anion + Ketene = (Fluorine anion bullet Ketene)

By formula: F- + C2H2O = (F- bullet C2H2O)

Quantity Value Units Method Reference Comment
Deltar35.3kcal/molICRLarson and McMahon, 1983gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity Value Units Method Reference Comment
Deltar26.5cal/mol*KN/ALarson and McMahon, 1983gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity Value Units Method Reference Comment
Deltar27.4kcal/molICRLarson and McMahon, 1983gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M

C2HO- + Hydrogen cation = Ketene

By formula: C2HO- + H+ = C2H2O

Quantity Value Units Method Reference Comment
Deltar364.8 ± 2.1kcal/molG+TSOakes, Jones, et al., 1983gas phase; Acid: ketene; value altered from reference due to change in acidity scale; B
Quantity Value Units Method Reference Comment
Deltar357.8 ± 2.0kcal/molIMRBOakes, Jones, et al., 1983gas phase; Acid: ketene; value altered from reference due to change in acidity scale; B

(C2H3O- bullet 4294967295Ketene) + Ketene = C2H3O-

By formula: (C2H3O- bullet 4294967295C2H2O) + C2H2O = C2H3O-

Quantity Value Units Method Reference Comment
Deltar61.5 ± 2.3kcal/molN/ABartmess, Scott, et al., 1979gas phase; Acid: ethanal. The enol is 9.6 kcal/mol more acidic: Holmes and Lossing, 1982; value altered from reference due to change in acidity scale; B

(CAS Reg. No. 78944-68-0 bullet 4294967295Ketene) + Ketene = CAS Reg. No. 78944-68-0

By formula: (CAS Reg. No. 78944-68-0 bullet 4294967295C2H2O) + C2H2O = CAS Reg. No. 78944-68-0

Quantity Value Units Method Reference Comment
Deltar34.1 ± 1.1kcal/molN/ANimlos, Soderquist, et al., 1989gas phase; B
Deltar1.6 ± 2.2kcal/molTherDePuy, Bierbaum, et al., 1985gas phase; B

Sodium hydroxide + Ketene = Acetic acid, sodium salt

By formula: HNaO + C2H2O = C2H3NaO2

Quantity Value Units Method Reference Comment
Deltar-49.75 ± 0.38kcal/molCmNuttall, Laufer, et al., 1971gas phase; ALS
Deltar-47.16kcal/molCmRice and Greenberg, 1934gas phase; ALS

(CAS Reg. No. 64723-96-2 bullet 4294967295Ketene) + Ketene = CAS Reg. No. 64723-96-2

By formula: (CAS Reg. No. 64723-96-2 bullet 4294967295C2H2O) + C2H2O = CAS Reg. No. 64723-96-2

Quantity Value Units Method Reference Comment
Deltar48.4 ± 2.3kcal/molN/ABartmess, Scott, et al., 1979gas phase; value altered from reference due to change in acidity scale; B

(CAS Reg. No. 211040-82-3 bullet 4294967295Ketene) + Ketene = CAS Reg. No. 211040-82-3

By formula: (CAS Reg. No. 211040-82-3 bullet 4294967295C2H2O) + C2H2O = CAS Reg. No. 211040-82-3

Quantity Value Units Method Reference Comment
Deltar29.2 ± 2.9kcal/molN/ATaft, 1987gas phase; value altered from reference due to change in acidity scale; B

Diacetyl sulphide = Ketene + Thioacetic acid

By formula: C4H6O2S = C2H2O + C2H4OS

Quantity Value Units Method Reference Comment
Deltar22.6kcal/molEqkBlake and Speis, 1974gas phase; Heat of formation derived by 77PED/RYL; ALS

(CAS Reg. No. 84148-57-2 bullet 4294967295Ketene) + Ketene = CAS Reg. No. 84148-57-2

By formula: (CAS Reg. No. 84148-57-2 bullet 4294967295C2H2O) + C2H2O = CAS Reg. No. 84148-57-2

Quantity Value Units Method Reference Comment
Deltar55.3 ± 3.2kcal/molN/AGrabowski and Cheng, 1989gas phase; B

Ketene + Acetic acid = Acetic anhydride

By formula: C2H2O + C2H4O2 = C4H6O3

Quantity Value Units Method Reference Comment
Deltar-20.9 ± 0.53kcal/molEqkBlake, Davies, et al., 1971gas phase; ALS

Ketene + 1-Butanol = Acetic acid, butyl ester

By formula: C2H2O + C4H10O = C6H12O2

Quantity Value Units Method Reference Comment
Deltar-35.11kcal/molCmRice and Greenberg, 1934liquid phase; ALS

Ketene + 1-Propanol, 2-methyl- = Isobutyl acetate

By formula: C2H2O + C4H10O = C6H12O2

Quantity Value Units Method Reference Comment
Deltar-34.37kcal/molCmRice and Greenberg, 1934liquid phase; ALS

Ketene + 2-Butanol = sec-Butyl acetate

By formula: C2H2O + C4H10O = C6H12O2

Quantity Value Units Method Reference Comment
Deltar-34.53kcal/molCmRice and Greenberg, 1934liquid phase; ALS

Ketene + 2-Propanol, 2-methyl- = Acetic acid, 1,1-dimethylethyl ester

By formula: C2H2O + C4H10O = C6H12O2

Quantity Value Units Method Reference Comment
Deltar-23.49kcal/molCmRice and Greenberg, 1934liquid phase; ALS

Ketene + Isopropyl Alcohol = Isopropyl acetate

By formula: C2H2O + C3H8O = C5H10O2

Quantity Value Units Method Reference Comment
Deltar-35.91kcal/molCmRice and Greenberg, 1934liquid phase; ALS

Ketene + Thioacetic acid = Diacetyl sulphide

By formula: C2H2O + C2H4OS = C4H6O2S

Quantity Value Units Method Reference Comment
Deltar-22.6kcal/molEqkBlake and Speis, 1974gas phase; ALS

Ketene + Ethanol = Ethyl Acetate

By formula: C2H2O + C2H6O = C4H8O2

Quantity Value Units Method Reference Comment
Deltar-36.44kcal/molCmRice and Greenberg, 1934gas phase; ALS

Ketene + 1-Propanol = n-Propyl acetate

By formula: C2H2O + C3H8O = C5H10O2

Quantity Value Units Method Reference Comment
Deltar-35.32kcal/molCmRice and Greenberg, 1934gas phase; ALS

Ketene + Methyl Alcohol = Acetic acid, methyl ester

By formula: C2H2O + CH4O = C3H6O2

Quantity Value Units Method Reference Comment
Deltar-36.93kcal/molCmRice and Greenberg, 1934gas phase; ALS

Gas phase ion energetics data

Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Ion clustering data, Mass spectrum (electron ionization), 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
MM - Michael M. Meot-Ner (Mautner)
LL - Sharon G. Lias and Joel F. Liebman
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron

View reactions leading to C2H2O+ (ion structure unspecified)

Quantity Value Units Method Reference Comment
IE (evaluated)9.617 ± 0.003eVN/AN/AL
Quantity Value Units Method Reference Comment
Proton affinity (review)197.3kcal/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity189.7kcal/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Deltaf(+) ion210.kcal/molN/AN/A 
Quantity Value Units Method Reference Comment
DeltafH(+) ion,0K211.kcal/molN/AN/A 

Proton affinity at 298K

Proton affinity (kcal/mol) Reference Comment
196.7 ± 0.81Bouchoux and Salpin, 1999T = 302K; Re-evaluated thermokinetic parametric fitting by the authors using reference base GBs and PAs from Hunter and Lias, 1998; MM
196.7 ± 0.81Bouchoux and Salpin, 1999T = 298K; MM

Gas basicity at 298K

Gas basicity (review) (kcal/mol) Reference Comment
188.8 ± 0.36Bouchoux and Salpin, 1999T = 302K; Re-evaluated thermokinetic parametric fitting by the authors using reference base GBs and PAs from Hunter and Lias, 1998; MM
188.8 ± 0.36Bouchoux and Salpin, 1999T = 298K; MM

Ionization energy determinations

IE (eV) Method Reference Comment
9.6191 ± 0.0004PENiu, Bai, et al., 1993LL
9.614 ± 0.008PIVogt, Williamson, et al., 1978LLK
9.61 ± 0.02PEVogt, Williamson, et al., 1978LLK
9.63 ± 0.02PEHall, Maier, et al., 1977LLK
9.64PEBaker and Turner, 1969RDSH
9.61 ± 0.02SPrice, Teegan, et al., 1951RDSH
9.64PEBock, Hirabayashi, et al., 1981Vertical value; LLK
9.60PEBock, Hirabayashi, et al., 1977Vertical value; LLK

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
CHO+16.1 ± 0.4CHEICollin and Locht, 1970RDSH
CH2+13.729 ± 0.008CODERMcCulloh and Dibeler, 1976T = 0K; LLK
CH2+13.712 ± 0.008COPIMcCulloh and Dibeler, 1976T = 400K; LLK
CH2+13.8 ± 0.2COEICollin and Locht, 1970RDSH
CO+13.6 ± 0.3?EICollin and Locht, 1970RDSH
C2HO+14.9 ± 0.3HEICollin and Locht, 1970RDSH

De-protonation reactions

C2HO- + Hydrogen cation = Ketene

By formula: C2HO- + H+ = C2H2O

Quantity Value Units Method Reference Comment
Deltar364.8 ± 2.1kcal/molG+TSOakes, Jones, et al., 1983gas phase; Acid: ketene; value altered from reference due to change in acidity scale; B
Quantity Value Units Method Reference Comment
Deltar357.8 ± 2.0kcal/molIMRBOakes, Jones, et al., 1983gas phase; Acid: ketene; value altered from reference due to change in acidity scale; B

Ion clustering data

Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, Mass spectrum (electron ionization), 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:
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

(C2H3O- bullet 4294967295Ketene) + Ketene = C2H3O-

By formula: (C2H3O- bullet 4294967295C2H2O) + C2H2O = C2H3O-

Quantity Value Units Method Reference Comment
Deltar61.5 ± 2.3kcal/molN/ABartmess, Scott, et al., 1979gas phase; Acid: ethanal. The enol is 9.6 kcal/mol more acidic: Holmes and Lossing, 1982; value altered from reference due to change in acidity scale; B

Fluorine anion + Ketene = (Fluorine anion bullet Ketene)

By formula: F- + C2H2O = (F- bullet C2H2O)

Quantity Value Units Method Reference Comment
Deltar35.3kcal/molICRLarson and McMahon, 1983gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity Value Units Method Reference Comment
Deltar26.5cal/mol*KN/ALarson and McMahon, 1983gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity Value Units Method Reference Comment
Deltar27.4kcal/molICRLarson and McMahon, 1983gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M

Mass spectrum (electron ionization)

Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering 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: NIST Mass Spectrometry Data Center, William E. Wallace, director

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References

Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering data, 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.

Orlov, Krivoruchko, et al., 1986
Orlov, V.M.; Krivoruchko, A.A.; Misharev, A.D.; Takhistov, V.V., Enthalpy of vapor phase formation of ketene, ethynol, and their analogs, Bull. Acad. Sci. USSR, Div. Chem. Sci., 1986, 2404-2405. [all data]

Nuttall, Laufer, et al., 1971
Nuttall, R.L.; Laufer, A.H.; Kilday, M.V., The enthalpy of formation of ketene, J. Chem. Thermodyn., 1971, 3, 167-174. [all data]

Rice and Greenberg, 1934
Rice, F.O.; Greenberg, J., Ketene. III. Heat of formation and heat of reaction with alcohols, J. Am. Chem. Soc., 1934, 38, 2268-2270. [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]

Cox A.P., 1963
Cox A.P., Fundamental vibrational frequencies in ketene and the deuteroketenes, J. Chem. Phys., 1963, 38, 1636-1643. [all data]

Moore C.B., 1963
Moore C.B., Infrared spectrum and vibrational potential function of ketene and the deuterated ketenes, J. Chem. Phys., 1963, 38, 2816-2829. [all data]

East A.L.L., 1997
East A.L.L., Ab initio statistical thermodynamical models for the computation of third-law entropies, J. Chem. Phys., 1997, 106, 6655-6674. [all data]

Drayton L.G., 1948
Drayton L.G., The infrared spectrum of ketene, J. Chem. Soc., 1948, 1416-1419. [all data]

Sundaram S., 1960
Sundaram S., Potential energy constants, rotational distortion constants, and thermodynamic properties of H2C=C=O and D2C=C=O, J. Chem. Phys., 1960, 32, 1554-1556. [all data]

Zhuravlev E.Z., 1959
Zhuravlev E.Z., Isotopic effect on thermodynamic functions of some organic deuterocompounds in the ideal gas state, Tr. Khim. i Khim. Tekhnol., 1959, 2, 475-485. [all data]

Reuben, 1969
Reuben, B.G., Vapor pressure of ketene, J. Chem. Eng. Data, 1969, 14, 235. [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]

Reuben, 1969, 2
Reuben, Bryan G., Vapor pressure of ketene, J. Chem. Eng. Data, 1969, 14, 2, 235-236, https://doi.org/10.1021/je60041a008 . [all data]

Marks, Brauman, et al., 1988
Marks, J.; Brauman, J.I.; Mead, R.D.; Lykke, K.R.; Lineberger, W.C., Spectroscopy and Dynamics of the Dipole Supported State of Acetyl Fluoride Enolate Anion, J. Chem. Phys., 1988, 88, 11, 6785, https://doi.org/10.1063/1.454424 . [all data]

Farid and McMahon, 1980
Farid, R.; McMahon, T.B., The gas phase acidities of fluorinated acetones. An ICR investigation of the role of fluorine substituents in the stabilization of planar carbanions, Can. J. Chem., 1980, 58, 2307. [all data]

Wenthold and Squires, 1995
Wenthold, P.G.; Squires, R.R., Bond dissociation energies of F2(-) and HF2(-). A gas-phase experimental and G2 theoretical study, J. Phys. Chem., 1995, 99, 7, 2002, https://doi.org/10.1021/j100007a034 . [all data]

Larson and McMahon, 1983
Larson, J.W.; McMahon, T.B., Strong hydrogen bonding in gas-phase anions. An ion cyclotron resonance determination of fluoride binding energetics to bronsted acids from gas-phase fluoride exchange equilibria measurements, J. Am. Chem. Soc., 1983, 105, 2944. [all data]

Arshadi, Yamdagni, et al., 1970
Arshadi, M.; Yamdagni, R.; Kebarle, P., Hydration of Halide Negative Ions in the Gas Phase. II. Comparison of Hydration Energies for the Alkali Positive and Halide Negative Ions, J. Phys. Chem., 1970, 74, 7, 1475, https://doi.org/10.1021/j100702a014 . [all data]

Oakes, Jones, et al., 1983
Oakes, J.M.; Jones, M.E.; Bierbaum, V.M.; Ellison, G.B., Photoelectron spectroscopy of CCO- and HCCO-, J. Phys. Chem., 1983, 87, 4810. [all data]

Bartmess, Scott, et al., 1979
Bartmess, J.E.; Scott, J.A.; McIver, R.T., Jr., The gas phase acidity scale from methanol to phenol, J. Am. Chem. Soc., 1979, 101, 6047. [all data]

Holmes and Lossing, 1982
Holmes, J.L.; Lossing, F.P., Heats of formation of the ionic and neutral enols of acetaldehyde and acetone, J. Am. Chem. Soc., 1982, 104, 2648. [all data]

Nimlos, Soderquist, et al., 1989
Nimlos, M.R.; Soderquist, J.A.; Ellison, G.B., Spectroscopy of CH3CO- and CH3CO, J. Am. Chem. Soc., 1989, 111, 20, 7675, https://doi.org/10.1021/ja00202a001 . [all data]

DePuy, Bierbaum, et al., 1985
DePuy, C.H.; Bierbaum, V.M.; Damrauer, R.; Soderquist, J.A., Gas-phase reactions of the acetyl anion, J. Am. Chem. Soc., 1985, 107, 3385. [all data]

Taft, 1987
Taft, R.W., The Nature and Analysis of Substitutent Electronic Effects, Personal communication. See also Prog. Phys. Org. Chem., 1987, 16, 1. [all data]

Blake and Speis, 1974
Blake, P.G.; Speis, A., Reactions of keten. Part IV. Kinetics and thermodynamics of the gas-phase reaction: Thioacetic acid + keten = acetic Thioanhydride, J. Chem. Soc. Perkin Trans. 2, 1974, 1879-1881. [all data]

Grabowski and Cheng, 1989
Grabowski, J.J.; Cheng, X., Gas-Phase Formation of the Enolate Monoanion of Acetic Acid by Proton Abstraction, J. Am. Chem. Soc., 1989, 111, 8, 3106, https://doi.org/10.1021/ja00190a078 . [all data]

Blake, Davies, et al., 1971
Blake, P.G.; Davies, H.H.; Speis, A., Reactions of keten. Part II. The thermodynamics of the gas-phase equilibrium: acetic acid + keten = acetic anhydride, J. Chem. Soc. B, 1971, 2050-2052. [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]

Bouchoux and Salpin, 1999
Bouchoux, J.; Salpin, J.Y., Re-evaluated gas-phase basicity and proton affinity data from the thermokinetic method, Rapid Com. Mass Spectrom., 1999, 13, 932. [all data]

Niu, Bai, et al., 1993
Niu, B.; Bai, Y.; Shirley, D.A., High resolution photoelectron spectroscopy and femtosecond intramolecular dynamics of H2CCO+ and D2CCO+, J. Chem. Phys., 1993, 99, 2520. [all data]

Vogt, Williamson, et al., 1978
Vogt, J.; Williamson, A.D.; Beauchamp, J.L., Properties and reactions of ketene in the gas phase by ion cyclotron resonance spectroscopy and photoionization mass spectrometry. Proton affinity, site specificity of protonation, and heat of formation of ketene, J. Am. Chem. Soc., 1978, 100, 3478. [all data]

Hall, Maier, et al., 1977
Hall, D.; Maier, J.P.; Rosmus, P., Electronic states of ketene radical cation, Chem. Phys., 1977, 24, 373. [all data]

Baker and Turner, 1969
Baker, C.; Turner, D.W., Photoelectron spectra of allene and keten; Jahn-Teller distortion in the ionisation of allene, Chem. Commun., 1969, 480. [all data]

Price, Teegan, et al., 1951
Price, W.C.; Teegan, J.P.; Walsh, A.D., The absorption spectrum of ketene in the far ultra-violet, J. Chem. Soc., 1951, 920. [all data]

Bock, Hirabayashi, et al., 1981
Bock, H.; Hirabayashi, T.; Mohmand, S., Thermische erzeugung von alkyl- und halogenketenen, Chem. Ber., 1981, 114, 2595. [all data]

Bock, Hirabayashi, et al., 1977
Bock, H.; Hirabayashi, T.; Mohmand, S.; Solouki, B., Instabile Zwischenprodukte in der Gasphase: Der thermische Zerfall von Carbonsaurechloriden RCOCl, Angew. Chem., 1977, 89, 106. [all data]

Collin and Locht, 1970
Collin, J.E.; Locht, R., Positive and negative ion formation in ketene by electron impact, Intern. J. Mass Spectrom. Ion Phys., 1970, 3, 465. [all data]

McCulloh and Dibeler, 1976
McCulloh, K.E.; Dibeler, V.H., Enthalpy of formation of methyl and methylene radicals of photoionization studies of methane and ketene, J. Chem. Phys., 1976, 64, 4445. [all data]


Notes

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