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Sulfur dioxide

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Gas phase thermochemistry data

Go To: Top, 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, Notes

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

Quantity Value Units Method Reference Comment
Deltafgas-296.81 ± 0.20kJ/molReviewCox, Wagman, et al., 1984CODATA Review value
Deltafgas-296.84kJ/molReviewChase, 1998Data last reviewed in June, 1961
Quantity Value Units Method Reference Comment
gas,1 bar248.223 ± 0.050J/mol*KReviewCox, Wagman, et al., 1984CODATA Review value
gas,1 bar248.21J/mol*KReviewChase, 1998Data last reviewed in June, 1961

Gas Phase Heat Capacity (Shomate Equation)

Cp° = A + B*t + C*t2 + D*t3 + E/t2
H° − H°298.15= A*t + B*t2/2 + C*t3/3 + D*t4/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 − E/(2*t2) + G
    Cp = heat capacity (J/mol*K)
    H° = standard enthalpy (kJ/mol)
    S° = standard entropy (J/mol*K)
    t = temperature (K) / 1000.

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View table.

Temperature (K) 298. - 1200.1200. - 6000.
A 21.4304957.48188
B 74.350941.009328
C -57.75217-0.076290
D 16.355340.005174
E 0.086731-4.045401
F -305.7688-324.4140
G 254.8872302.7798
H -296.8422-296.8422
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in June, 1961 Data last reviewed in June, 1961

Phase change data

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, 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:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny, director
AC - William E. Acree, Jr., James S. Chickos

Quantity Value Units Method Reference Comment
Tfus200.75KN/AHoffman and Vanderwerf, 1946Uncertainty assigned by TRC = 0.5 K; TRC
Quantity Value Units Method Reference Comment
Ttriple197.64KN/AGiauque and Stephenson, 1938Uncertainty assigned by TRC = 0.05 K; Temp. Scale based on T0 = 273.10 K; TRC
Quantity Value Units Method Reference Comment
Ptriple0.0167barN/AGiauque and Stephenson, 1938Uncertainty assigned by TRC = 0.000067 bar; TRC
Quantity Value Units Method Reference Comment
Tc430.34KN/ATravers and Usher, 1906Uncertainty assigned by TRC = 0.4 K; TRC

Enthalpy of vaporization

DeltavapH (kJ/mol) Temperature (K) Method Reference Comment
24.9263.N/AGiauque and Stephenson, 1938, 2Based on data from 200. - 263. K.; AC
24.9263.CGiauque and Stephenson, 1938, 2AC

Antoine Equation Parameters

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

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Temperature (K) A B C Reference Comment
177.7 - 263.3.48586668.225-72.252Stull, 1947Coefficents calculated by NIST from author's data.
263. - 414.94.37798966.575-42.071Stull, 1947Coefficents calculated by NIST from author's data.

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

Go To: Top, Gas phase thermochemistry data, Phase change data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, 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. 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.

Reactions 1 to 50

Chlorine anion + Sulfur dioxide = (Chlorine anion bullet Sulfur dioxide)

By formula: Cl- + O2S = (Cl- bullet O2S)

Quantity Value Units Method Reference Comment
Deltar92.9 ± 8.4kJ/molTDAsCaldwell and Kebarle, 1985gas phase; B,M
Deltar87.4 ± 8.4kJ/molIMRELarson and McMahon, 1985gas phase; B
Deltar92.9 ± 9.2kJ/molTDEqBohringer, Fahey, et al., 1984gas phase; Relative to HOH..Cl- in Keesee, Lee, et al., 1980; B,M
Deltar91.21 ± 0.84kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B,M
Deltar87.4kJ/molICRLarson and McMahon, 1984gas phase; switching reaction(Cl-)t-C4H9OH, Entropy change calculated or estimated; French, Ikuta, et al., 1982; M
Quantity Value Units Method Reference Comment
Deltar90.4J/mol*KPHPMSCaldwell and Kebarle, 1985gas phase; M
Deltar101.J/mol*KN/ABohringer, Fahey, et al., 1984gas phase; switching reaction(Cl-)H2O), Entropy change calculated or estimated; Keesee and Castleman, 1980; M
Deltar87.0J/mol*KN/ALarson and McMahon, 1984gas phase; switching reaction(Cl-)t-C4H9OH, Entropy change calculated or estimated; French, Ikuta, et al., 1982; M
Deltar97.1J/mol*KHPMSKeesee, Lee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
Deltar65.7 ± 8.4kJ/molTDAsCaldwell and Kebarle, 1985gas phase; B
Deltar61.5 ± 8.4kJ/molIMRELarson and McMahon, 1985gas phase; B
Deltar62.8 ± 6.7kJ/molTDEqBohringer, Fahey, et al., 1984gas phase; Relative to HOH..Cl- in Keesee, Lee, et al., 1980; B,M
Deltar61.9 ± 1.3kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B
Deltar61.5kJ/molICRLarson and McMahon, 1984gas phase; switching reaction(Cl-)t-C4H9OH, Entropy change calculated or estimated; French, Ikuta, et al., 1982; M

Free energy of reaction

DeltarG° (kJ/mol) T (K) Method Reference Comment
59.4296.FAFehsenfeld and Ferguson, 1974gas phase; switching reaction(Cl-)H2O; M

Fluorine anion + Sulfur dioxide = (Fluorine anion bullet Sulfur dioxide)

By formula: F- + O2S = (F- bullet O2S)

Quantity Value Units Method Reference Comment
Deltar225. ± 9.2kJ/molCIDTLobring, Check, et al., 2003gas phase; B
Deltar222. ± 10.kJ/molCIDTSquires, 1992gas phase; B
Deltar183.kJ/molICRLarson and McMahon, 1985gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Deltar183. ± 8.4kJ/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,M
Deltar250.kJ/molSAMSRobbiani and Franklin, 1979gas phase; Cl- + CO2ClF --> SO2F- + Cl2, «DELTA»rH>; M
Quantity Value Units Method Reference Comment
Deltar100.J/mol*KN/ALarson and McMahon, 1985gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Deltar96.2J/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
Deltar153.kJ/molICRLarson and McMahon, 1985gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Deltar154. ± 8.4kJ/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,M

NO3 anion + Sulfur dioxide = (NO3 anion bullet Sulfur dioxide)

By formula: NO3- + O2S = (NO3- bullet O2S)

Quantity Value Units Method Reference Comment
Deltar72.0 ± 8.4kJ/molTDEqBohringer, Fahey, et al., 1984gas phase; Relative to HOH..NO3-, Keesee, Lee, et al., 1980; B,M
Deltar76.1 ± 5.0kJ/molTDAsWlodek, Luczynski, et al., 1983gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar105.J/mol*KN/ABohringer, Fahey, et al., 1984gas phase; switching reaction(NO3-)H2O, Entropy change calculated or estimated; Lee, Keesee, et al., 1980; M
Deltar132.J/mol*KHPMSWlodek, Luczynski, et al., 1983gas phase; M
Quantity Value Units Method Reference Comment
Deltar40. ± 8.4kJ/molTDEqBohringer, Fahey, et al., 1984gas phase; Relative to HOH..NO3-, Keesee, Lee, et al., 1980; B,M
Deltar41.84 ± 0.42kJ/molTDAsBanic and Iribarne, 1985gas phase; B
Deltar36.8 ± 3.8kJ/molTDAsWlodek, Luczynski, et al., 1983gas phase; B
Deltar44.4kJ/molFAFehsenfeld and Ferguson, 1974gas phase; switching reaction(NO3-)SO2, Entropy change calculated or estimated; Lee, Keesee, et al., 1980; M

Free energy of reaction

DeltarG° (kJ/mol) T (K) Method Reference Comment
41.8299.HPMSBanic and Iribarne, 1985gas phase; electric fields; M

Iodide + Sulfur dioxide = (Iodide bullet Sulfur dioxide)

By formula: I- + O2S = (I- bullet O2S)

Quantity Value Units Method Reference Comment
Deltar59.8 ± 8.4kJ/molTDAsCaldwell and Kebarle, 1985gas phase; B,M
Deltar53.97 ± 0.42kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar73.6J/mol*KPHPMSCaldwell and Kebarle, 1985gas phase; M
Deltar84.5J/mol*KHPMSKeesee, Lee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
Deltar38. ± 11.kJ/molTDAsCaldwell and Kebarle, 1985gas phase; B
Deltar7.11 ± 0.42kJ/molTDAsBanic and Iribarne, 1985gas phase; B
Deltar28.5 ± 0.84kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B

Free energy of reaction

DeltarG° (kJ/mol) T (K) Method Reference Comment
38.301.HPMSBanic and Iribarne, 1985gas phase; electric fields; M

O2S- + Sulfur dioxide = (O2S- bullet Sulfur dioxide)

By formula: O2S- + O2S = (O2S- bullet O2S)

Quantity Value Units Method Reference Comment
Deltar100.4 ± 0.84kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B,M
Deltar89.1 ± 5.4kJ/molTDAsVacher, Leduc, et al., 1994gas phase; B
Deltar77.40kJ/molN/ADresch, Kramer, et al., 1991gas phase; Both dissociation and electron detachment?; B
Deltar76.57kJ/molN/ASnodgrass, Coe, et al., 1988gas phase; Appears to be dissociation + electron detachment; B
Quantity Value Units Method Reference Comment
Deltar141.J/mol*KHPMSKeesee, Lee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
Deltar58.2 ± 1.7kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B
Deltar43.5 ± 9.2kJ/molTDAsVacher, Leduc, et al., 1994gas phase; B

Nitrogen oxide anion + Sulfur dioxide = (Nitrogen oxide anion bullet Sulfur dioxide)

By formula: NO2- + O2S = (NO2- bullet O2S)

Quantity Value Units Method Reference Comment
Deltar108.4 ± 0.84kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B,M
Deltar102. ± 4.2kJ/molTDEqBohringer, Fahey, et al., 1984gas phase; Relative to HOH..NO2-, Keesee, Lee, et al., 1980; B,M
Quantity Value Units Method Reference Comment
Deltar154.J/mol*KHPMSKeesee, Lee, et al., 1980gas phase; M
Deltar132.J/mol*KN/ABohringer, Fahey, et al., 1984gas phase; switching reaction(NO2-)H2O, Entropy change calculated or estimated; Lee, Keesee, et al., 1980; M
Quantity Value Units Method Reference Comment
Deltar62.3 ± 1.3kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B

CO3- + Sulfur dioxide = (CO3- bullet Sulfur dioxide)

By formula: CO3- + O2S = (CO3- bullet O2S)

Quantity Value Units Method Reference Comment
Deltar59.kJ/molHPMSKeesee, Lee, et al., 1980gas phase; switching reaction(O-)CO2, Entropy change calculated or estimated; Fehsenfeld and Ferguson, 1974; M
Quantity Value Units Method Reference Comment
Deltar84.J/mol*KN/AKeesee, Lee, et al., 1980gas phase; switching reaction(O-)CO2, Entropy change calculated or estimated; Fehsenfeld and Ferguson, 1974; M

Free energy of reaction

DeltarG° (kJ/mol) T (K) Method Reference Comment
33.296.HPMSKeesee, Lee, et al., 1980gas phase; switching reaction(O-)CO2, Entropy change calculated or estimated; Fehsenfeld and Ferguson, 1974; M

(Chlorine anion bullet Sulfur dioxide) + Water = (Chlorine anion bullet Water bullet Sulfur dioxide)

By formula: (Cl- bullet O2S) + H2O = (Cl- bullet H2O bullet O2S)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity Value Units Method Reference Comment
Deltar43.51kJ/molTDAsUpschulte, Schelling, et al., 1984gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar81.2J/mol*KHPMSUpschulte, Schelling, et al., 1984gas phase; M
Quantity Value Units Method Reference Comment
Deltar19.2kJ/molTDAsUpschulte, Schelling, et al., 1984gas phase; B

Free energy of reaction

DeltarG° (kJ/mol) T (K) Method Reference Comment
23.296.FAFehsenfeld and Ferguson, 1974gas phase; From thermochemical cycle,switching reaction(H2O/SO2); M

(Chlorine anion bullet Sulfur dioxide) + Sulfur dioxide = (Chlorine anion bullet 2Sulfur dioxide)

By formula: (Cl- bullet O2S) + O2S = (Cl- bullet 2O2S)

Quantity Value Units Method Reference Comment
Deltar51.5 ± 4.2kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B,M
Deltar51.5kJ/molPHPMSCaldwell and Kebarle, 1985gas phase; M
Quantity Value Units Method Reference Comment
Deltar84.5J/mol*KPHPMSCaldwell and Kebarle, 1985gas phase; M
Deltar95.0J/mol*KHPMSKeesee, Lee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
Deltar23. ± 9.2kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B

(Nitrogen oxide anion bullet Sulfur dioxide) + Sulfur dioxide = (Nitrogen oxide anion bullet 2Sulfur dioxide)

By formula: (NO2- bullet O2S) + O2S = (NO2- bullet 2O2S)

Quantity Value Units Method Reference Comment
Deltar37.7 ± 0.84kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B,M
Deltar41.kJ/molHPMSWlodek, Luczynski, et al., 1983gas phase; M
Quantity Value Units Method Reference Comment
Deltar90.0J/mol*KHPMSWlodek, Luczynski, et al., 1983gas phase; M
Deltar70.3J/mol*KHPMSKeesee, Lee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
Deltar16.7 ± 1.7kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B

(Sodium ion (1+) bullet 3Sulfur dioxide) + Sulfur dioxide = (Sodium ion (1+) bullet 4Sulfur dioxide)

By formula: (Na+ bullet 3O2S) + O2S = (Na+ bullet 4O2S)

Quantity Value Units Method Reference Comment
Deltar51.5kJ/molHPMSCastleman, Peterson, et al., 1983gas phase; Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
Deltar110.J/mol*KN/ACastleman, Peterson, et al., 1983gas phase; Entropy change calculated or estimated; M

Free energy of reaction

DeltarG° (kJ/mol) T (K) Method Reference Comment
13.328.HPMSCastleman, Peterson, et al., 1983gas phase; Entropy change calculated or estimated; M

(Bromine anion bullet Sulfur dioxide) + Hydrogen bromide = (Bromine anion bullet Hydrogen bromide bullet Sulfur dioxide)

By formula: (Br- bullet O2S) + HBr = (Br- bullet HBr bullet O2S)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity Value Units Method Reference Comment
Deltar51.0kJ/molPHPMSCaldwell and Kebarle, 1985gas phase; From thermochemical cycle,switching reaction(Br- HBr)SO2; M
Quantity Value Units Method Reference Comment
Deltar80.3J/mol*KPHPMSCaldwell and Kebarle, 1985gas phase; From thermochemical cycle,switching reaction(Br- HBr)SO2; M

(Chlorine anion bullet Sulfur dioxide bullet Water) + Sulfur dioxide = (Chlorine anion bullet 2Sulfur dioxide bullet Water)

By formula: (Cl- bullet O2S bullet H2O) + O2S = (Cl- bullet 2O2S bullet H2O)

Quantity Value Units Method Reference Comment
Deltar49.4kJ/molHPMSUpschulte, Schelling, et al., 1984gas phase; From thermochemical cycle; M
Quantity Value Units Method Reference Comment
Deltar109.J/mol*KHPMSUpschulte, Schelling, et al., 1984gas phase; From thermochemical cycle; M

Free energy of reaction

DeltarG° (kJ/mol) T (K) Method Reference Comment
17.296.HPMSUpschulte, Schelling, et al., 1984gas phase; From thermochemical cycle; M

Sodium ion (1+) + Sulfur dioxide = (Sodium ion (1+) bullet Sulfur dioxide)

By formula: Na+ + O2S = (Na+ bullet O2S)

Quantity Value Units Method Reference Comment
Deltar79.1kJ/molFAPerry, Rowe, et al., 1980gas phase; Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
Deltar84.9J/mol*KN/APerry, Rowe, et al., 1980gas phase; Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
Deltar53.6kJ/molFAPerry, Rowe, et al., 1980gas phase; Entropy change calculated or estimated; M

(Bromine anion bullet Sulfur dioxide) + Hydrogen chloride = (Bromine anion bullet Hydrogen chloride bullet Sulfur dioxide)

By formula: (Br- bullet O2S) + HCl = (Br- bullet HCl bullet O2S)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity Value Units Method Reference Comment
Deltar93.7kJ/molPHPMSCaldwell and Kebarle, 1985gas phase; From thermochemical cycle,switching reaction(Br-)SO2; M
Quantity Value Units Method Reference Comment
Deltar77.8J/mol*KPHPMSCaldwell and Kebarle, 1985gas phase; From thermochemical cycle,switching reaction(Br-)SO2; M

(Chlorine anion bullet 2Water) + Sulfur dioxide = (Chlorine anion bullet Sulfur dioxide bullet 2Water)

By formula: (Cl- bullet 2H2O) + O2S = (Cl- bullet O2S bullet 2H2O)

Quantity Value Units Method Reference Comment
Deltar59.0kJ/molHPMSUpschulte, Schelling, et al., 1984gas phase; From thermochemical cycle; M
Quantity Value Units Method Reference Comment
Deltar81.2J/mol*KHPMSUpschulte, Schelling, et al., 1984gas phase; From thermochemical cycle; M

Free energy of reaction

DeltarG° (kJ/mol) T (K) Method Reference Comment
35.296.HPMSUpschulte, Schelling, et al., 1984gas phase; From thermochemical cycle; M

(O2S- bullet Sulfur dioxide) + Sulfur dioxide = (O2S- bullet 2Sulfur dioxide)

By formula: (O2S- bullet O2S) + O2S = (O2S- bullet 2O2S)

Quantity Value Units Method Reference Comment
Deltar33.9 ± 1.3kJ/molTDAsVacher, Jorda, et al., 1992gas phase; B
Deltar35.kJ/molHPMSKeesee, Lee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
Deltar66.9J/mol*KHPMSKeesee, Lee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
Deltar16.3 ± 0.84kJ/molTDAsVacher, Jorda, et al., 1992gas phase; B

(Chlorine anion bullet Water bullet Sulfur dioxide) + Water = (Chlorine anion bullet 2Water bullet Sulfur dioxide)

By formula: (Cl- bullet H2O bullet O2S) + H2O = (Cl- bullet 2H2O bullet O2S)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity Value Units Method Reference Comment
Deltar38.9kJ/molTDAsUpschulte, Schelling, et al., 1984gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar82.4J/mol*KHPMSUpschulte, Schelling, et al., 1984gas phase; M
Quantity Value Units Method Reference Comment
Deltar14.2kJ/molTDAsUpschulte, Schelling, et al., 1984gas phase; B

(Chlorine anion bullet 2Sulfur dioxide) + Water = (Chlorine anion bullet Water bullet 2Sulfur dioxide)

By formula: (Cl- bullet 2O2S) + H2O = (Cl- bullet H2O bullet 2O2S)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity Value Units Method Reference Comment
Deltar41.4kJ/molTDAsUpschulte, Schelling, et al., 1984gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar95.0J/mol*KHPMSUpschulte, Schelling, et al., 1984gas phase; M
Quantity Value Units Method Reference Comment
Deltar13.0kJ/molTDAsUpschulte, Schelling, et al., 1984gas phase; B

(Nitrogen oxide anion bullet 2Sulfur dioxide) + Sulfur dioxide = (Nitrogen oxide anion bullet 3Sulfur dioxide)

By formula: (NO2- bullet 2O2S) + O2S = (NO2- bullet 3O2S)

Quantity Value Units Method Reference Comment
Deltar27.6 ± 0.84kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar56.1J/mol*KHPMSKeesee, Lee, et al., 1980gas phase; Entropy change is questionable; M
Quantity Value Units Method Reference Comment
Deltar10.9 ± 3.3kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B

(Chlorine anion bullet Sulfur dioxide) + Hydrogen chloride = (Chlorine anion bullet Hydrogen chloride bullet Sulfur dioxide)

By formula: (Cl- bullet O2S) + HCl = (Cl- bullet HCl bullet O2S)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity Value Units Method Reference Comment
Deltar58.2kJ/molPHPMSCaldwell and Kebarle, 1985gas phase; From thermochemical cycle; M
Quantity Value Units Method Reference Comment
Deltar80.3J/mol*KPHPMSCaldwell and Kebarle, 1985gas phase; From thermochemical cycle; M

(Chlorine anion bullet Water) + Sulfur dioxide = (Chlorine anion bullet Sulfur dioxide bullet Water)

By formula: (Cl- bullet H2O) + O2S = (Cl- bullet O2S bullet H2O)

Quantity Value Units Method Reference Comment
Deltar72.8kJ/molHPMSUpschulte, Schelling, et al., 1984gas phase; M
Quantity Value Units Method Reference Comment
Deltar84.5J/mol*KHPMSUpschulte, Schelling, et al., 1984gas phase; M

Free energy of reaction

DeltarG° (kJ/mol) T (K) Method Reference Comment
48.1296.HPMSFehsenfeld and Ferguson, 1974gas phase; switching reaction(Cl- H2O)H2O; M

HO2S+ + Sulfur dioxide = (HO2S+ bullet Sulfur dioxide)

By formula: HO2S+ + O2S = (HO2S+ bullet O2S)

Quantity Value Units Method Reference Comment
Deltar89.1kJ/molPHPMSSzulejko and McMahon, 1992gas phase; M
Deltar97.1kJ/molPHPMSMcMahon and Kebarle, 1986gas phase; M
Quantity Value Units Method Reference Comment
Deltar108.J/mol*KPHPMSSzulejko and McMahon, 1992gas phase; M
Deltar115.J/mol*KPHPMSMcMahon and Kebarle, 1986gas phase; M

(Chlorine anion bullet 2Sulfur dioxide) + Sulfur dioxide = (Chlorine anion bullet 3Sulfur dioxide)

By formula: (Cl- bullet 2O2S) + O2S = (Cl- bullet 3O2S)

Quantity Value Units Method Reference Comment
Deltar41.84 ± 0.42kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar96.7J/mol*KHPMSKeesee, Lee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
Deltar13.0 ± 1.3kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B

(Iodide bullet 2Sulfur dioxide) + Sulfur dioxide = (Iodide bullet 3Sulfur dioxide)

By formula: (I- bullet 2O2S) + O2S = (I- bullet 3O2S)

Quantity Value Units Method Reference Comment
Deltar38.5 ± 0.84kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar103.J/mol*KHPMSKeesee, Lee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
Deltar7.5 ± 2.5kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B

(Iodide bullet Sulfur dioxide) + Sulfur dioxide = (Iodide bullet 2Sulfur dioxide)

By formula: (I- bullet O2S) + O2S = (I- bullet 2O2S)

Quantity Value Units Method Reference Comment
Deltar42.26 ± 0.42kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar90.4J/mol*KHPMSKeesee, Lee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
Deltar15.1 ± 1.3kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B

(Chlorine anion bullet 3Sulfur dioxide) + Sulfur dioxide = (Chlorine anion bullet 4Sulfur dioxide)

By formula: (Cl- bullet 3O2S) + O2S = (Cl- bullet 4O2S)

Quantity Value Units Method Reference Comment
Deltar36.0 ± 0.84kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar97.1J/mol*KHPMSKeesee, Lee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
Deltar6.7 ± 4.2kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B

(Iodide bullet Sulfur dioxide) + Water = (Iodide bullet Water bullet Sulfur dioxide)

By formula: (I- bullet O2S) + H2O = (I- bullet H2O bullet O2S)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity Value Units Method Reference Comment
Deltar14.6 ± 0.42kJ/molTDAsBanic and Iribarne, 1985gas phase; B

Free energy of reaction

DeltarG° (kJ/mol) T (K) Method Reference Comment
15.300.HPMSBanic and Iribarne, 1985gas phase; electric fields; M

HO- + Sulfur dioxide = (HO- bullet Sulfur dioxide)

By formula: HO- + O2S = (HO- bullet O2S)

Quantity Value Units Method Reference Comment
Deltar259. ± 12.kJ/molCIDTSquires, 1992gas phase; Dissociative protonation between HCl, MeCHClCO2H; B
Deltar>213. ± 13.kJ/molIMRBHierl and Paulson, 1984gas phase; CO2..HO- + SO2 ->. data revised per 92SQU; B

Bromine anion + Sulfur dioxide = (Bromine anion bullet Sulfur dioxide)

By formula: Br- + O2S = (Br- bullet O2S)

Quantity Value Units Method Reference Comment
Deltar80.8 ± 8.4kJ/molTDAsCaldwell and Kebarle, 1985gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar92.0J/mol*KPHPMSCaldwell and Kebarle, 1985gas phase; M
Quantity Value Units Method Reference Comment
Deltar53. ± 11.kJ/molTDAsCaldwell and Kebarle, 1985gas phase; B

CN- + Sulfur dioxide = (CN- bullet Sulfur dioxide)

By formula: CN- + O2S = (CN- bullet O2S)

Quantity Value Units Method Reference Comment
Deltar90.8 ± 3.3kJ/molTDAsLarson, Szulejko, et al., 1988gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar120.J/mol*KPHPMSLarson, Szulejko, et al., 1988gas phase; M
Quantity Value Units Method Reference Comment
Deltar56.07 ± 0.84kJ/molTDAsLarson, Szulejko, et al., 1988gas phase; B

Cesium ion (1+) + Sulfur dioxide = (Cesium ion (1+) bullet Sulfur dioxide)

By formula: Cs+ + O2S = (Cs+ bullet O2S)

Quantity Value Units Method Reference Comment
Deltar45.2kJ/molDTMcKnight and Sawina, 1972gas phase; M
Quantity Value Units Method Reference Comment
Deltar79.1J/mol*KDTMcKnight and Sawina, 1972gas phase; M

Free energy of reaction

DeltarG° (kJ/mol) T (K) Method Reference Comment
22.300.HPMSBanic and Iribarne, 1985gas phase; electric fields; M

(Nitrogen oxide anion bullet Sulfur dioxide) + Nitric acid, ethyl ester = (Nitrogen oxide anion bullet Nitric acid, ethyl ester bullet Sulfur dioxide)

By formula: (NO2- bullet O2S) + C2H5NO3 = (NO2- bullet C2H5NO3 bullet O2S)

Quantity Value Units Method Reference Comment
Deltar31.kJ/molHPMSWlodek, Luczynski, et al., 1983gas phase; Entropy change is questionable; M
Quantity Value Units Method Reference Comment
Deltar43.5J/mol*KHPMSWlodek, Luczynski, et al., 1983gas phase; Entropy change is questionable; M

(NH4+ bullet 2Water bullet Sulfur dioxide) + Water = (NH4+ bullet 3Water bullet Sulfur dioxide)

By formula: (H4N+ bullet 2H2O bullet O2S) + H2O = (H4N+ bullet 3H2O bullet O2S)

Bond type: Hydrogen bond (positive ion to hydride)

Quantity Value Units Method Reference Comment
Deltar22.kJ/molHPMSBanic and Iribarne, 1985gas phase; From thermochemical cycle,switching reaction, electric fields; M

(NO3 anion bullet Sulfur dioxide) + Sulfur dioxide = (NO3 anion bullet 2Sulfur dioxide)

By formula: (NO3- bullet O2S) + O2S = (NO3- bullet 2O2S)

Quantity Value Units Method Reference Comment
Deltar37.kJ/molHPMSWlodek, Luczynski, et al., 1983gas phase; Entropy change is questionable; M
Quantity Value Units Method Reference Comment
Deltar59.0J/mol*KHPMSWlodek, Luczynski, et al., 1983gas phase; Entropy change is questionable; M

(NH4+ bullet Water bullet Sulfur dioxide) + Water = (NH4+ bullet 2Water bullet Sulfur dioxide)

By formula: (H4N+ bullet H2O bullet O2S) + H2O = (H4N+ bullet 2H2O bullet O2S)

Bond type: Hydrogen bond (positive ion to hydride)

Quantity Value Units Method Reference Comment
Deltar31.kJ/molHPMSBanic and Iribarne, 1985gas phase; From thermochemical cycle,switching reaction, electric fields; M

(O2S- bullet 2Water bullet 3Sulfur dioxide) + Water = (O2S- bullet 3Water bullet 3Sulfur dioxide)

By formula: (O2S- bullet 2H2O bullet 3O2S) + H2O = (O2S- bullet 3H2O bullet 3O2S)

Quantity Value Units Method Reference Comment
Deltar27.6 ± 1.3kJ/molTDAsVacher, Leduc, et al., 1994gas phase; B
Quantity Value Units Method Reference Comment
Deltar12.6 ± 0.84kJ/molTDAsVacher, Leduc, et al., 1994gas phase; B

(O2S- bullet 2Water bullet 4Sulfur dioxide) + Water = (O2S- bullet 3Water bullet 4Sulfur dioxide)

By formula: (O2S- bullet 2H2O bullet 4O2S) + H2O = (O2S- bullet 3H2O bullet 4O2S)

Quantity Value Units Method Reference Comment
Deltar29.7 ± 2.9kJ/molTDAsVacher, Leduc, et al., 1994gas phase; B
Quantity Value Units Method Reference Comment
Deltar10.9 ± 0.84kJ/molTDAsVacher, Leduc, et al., 1994gas phase; B

(O2S- bullet 5Sulfur dioxide bullet 2Water) + Sulfur dioxide = (O2S- bullet 6Sulfur dioxide bullet 2Water)

By formula: (O2S- bullet 5O2S bullet 2H2O) + O2S = (O2S- bullet 6O2S bullet 2H2O)

Quantity Value Units Method Reference Comment
Deltar15.9 ± 3.8kJ/molTDAsVacher, Leduc, et al., 1994gas phase; B
Quantity Value Units Method Reference Comment
Deltar4.60 ± 0.84kJ/molTDAsVacher, Leduc, et al., 1994gas phase; B

(O2S- bullet 6Sulfur dioxide bullet 2Water) + Sulfur dioxide = (O2S- bullet 7Sulfur dioxide bullet 2Water)

By formula: (O2S- bullet 6O2S bullet 2H2O) + O2S = (O2S- bullet 7O2S bullet 2H2O)

Quantity Value Units Method Reference Comment
Deltar15.5 ± 2.9kJ/molTDAsVacher, Leduc, et al., 1994gas phase; B
Quantity Value Units Method Reference Comment
Deltar2.5 ± 0.84kJ/molTDAsVacher, Leduc, et al., 1994gas phase; B

(O2S- bullet Water bullet 3Sulfur dioxide) + Water = (O2S- bullet 2Water bullet 3Sulfur dioxide)

By formula: (O2S- bullet H2O bullet 3O2S) + H2O = (O2S- bullet 2H2O bullet 3O2S)

Quantity Value Units Method Reference Comment
Deltar29.7 ± 1.7kJ/molTDAsVacher, Leduc, et al., 1994gas phase; B
Quantity Value Units Method Reference Comment
Deltar15.9 ± 0.84kJ/molTDAsVacher, Leduc, et al., 1994gas phase; B

(O2S- bullet Water bullet 4Sulfur dioxide) + Water = (O2S- bullet 2Water bullet 4Sulfur dioxide)

By formula: (O2S- bullet H2O bullet 4O2S) + H2O = (O2S- bullet 2H2O bullet 4O2S)

Quantity Value Units Method Reference Comment
Deltar29.7 ± 2.9kJ/molTDAsVacher, Leduc, et al., 1994gas phase; B
Quantity Value Units Method Reference Comment
Deltar12.6 ± 0.84kJ/molTDAsVacher, Leduc, et al., 1994gas phase; B

(Hydronium cation bullet 4Water) + Sulfur dioxide = (Hydronium cation bullet Sulfur dioxide bullet 4Water)

By formula: (H3O+ bullet 4H2O) + O2S = (H3O+ bullet O2S bullet 4H2O)

Free energy of reaction

DeltarG° (kJ/mol) T (K) Method Reference Comment
11.300.HPMSBanic and Iribarne, 1985gas phase; electric fields; M
11.300.HPMSBanic and Iribarne, 1985gas phase; electric fields; M

(O2S- bullet 6Sulfur dioxide bullet Water) + Sulfur dioxide = (O2S- bullet 7Sulfur dioxide bullet Water)

By formula: (O2S- bullet 6O2S bullet H2O) + O2S = (O2S- bullet 7O2S bullet H2O)

Quantity Value Units Method Reference Comment
Deltar13.4 ± 2.5kJ/molTDAsVacher, Leduc, et al., 1994gas phase; B
Quantity Value Units Method Reference Comment
Deltar2.9 ± 0.84kJ/molTDAsVacher, Leduc, et al., 1994gas phase; B

(NO3 anion bullet Sulfur dioxide) + Water = (NO3 anion bullet Water bullet Sulfur dioxide)

By formula: (NO3- bullet O2S) + H2O = (NO3- bullet H2O bullet O2S)

Quantity Value Units Method Reference Comment
Deltar18.0 ± 0.42kJ/molTDAsBanic and Iribarne, 1985gas phase; B

Free energy of reaction

DeltarG° (kJ/mol) T (K) Method Reference Comment
18.299.HPMSBanic and Iribarne, 1985gas phase; electric fields; M

(Iodide bullet Water) + Sulfur dioxide = (Iodide bullet Sulfur dioxide bullet Water)

By formula: (I- bullet H2O) + O2S = (I- bullet O2S bullet H2O)

Quantity Value Units Method Reference Comment
Deltar37.7 ± 0.42kJ/molTDAsBanic and Iribarne, 1985gas phase; B

Free energy of reaction

DeltarG° (kJ/mol) T (K) Method Reference Comment
30.300.HPMSBanic and Iribarne, 1985gas phase; electric fields; M

(O2S- bullet 2Sulfur dioxide bullet Oxygen) + Sulfur dioxide = (O2S- bullet 3Sulfur dioxide bullet Oxygen)

By formula: (O2S- bullet 2O2S bullet O2) + O2S = (O2S- bullet 3O2S bullet O2)

Quantity Value Units Method Reference Comment
Deltar15.1 ± 1.7kJ/molTDAsVacher, Jorda, et al., 1992gas phase; B
Quantity Value Units Method Reference Comment
Deltar6. ± 13.kJ/molTDAsVacher, Jorda, et al., 1992gas phase; B

(O2S- bullet Sulfur dioxide bullet Oxygen) + Sulfur dioxide = (O2S- bullet 2Sulfur dioxide bullet Oxygen)

By formula: (O2S- bullet O2S bullet O2) + O2S = (O2S- bullet 2O2S bullet O2)

Quantity Value Units Method Reference Comment
Deltar19.2 ± 1.7kJ/molTDAsVacher, Jorda, et al., 1992gas phase; B
Quantity Value Units Method Reference Comment
Deltar10. ± 8.4kJ/molTDAsVacher, Jorda, et al., 1992gas phase; B

(O3S- bullet Sulfur dioxide bullet Oxygen) + Sulfur dioxide = (O3S- bullet 2Sulfur dioxide bullet Oxygen)

By formula: (O3S- bullet O2S bullet O2) + O2S = (O3S- bullet 2O2S bullet O2)

Quantity Value Units Method Reference Comment
Deltar23.8 ± 2.5kJ/molTDAsVacher, Jorda, et al., 1992gas phase; B
Quantity Value Units Method Reference Comment
Deltar15. ± 8.8kJ/molTDAsVacher, Jorda, et al., 1992gas phase; B

Methyl cation + Sulfur dioxide = (Methyl cation bullet Sulfur dioxide)

By formula: CH3+ + O2S = (CH3+ bullet O2S)

Quantity Value Units Method Reference Comment
Deltar254.kJ/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 202. kJ/mol; Foster, Williamson, et al., 1974; M

Henry's Law data

Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, 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 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
1.42900.LN/A 
1.53200.QN/AOnly the tabulated data between T = 273. K and T = 303. K from missing citation was used to derive kH and -«DELTA» kH/R. Above T = 303. K the tabulated data could not be parameterized by equation (reference missing) very well. The partial pressure of water vapor (needed to convert some Henry's law constants) was calculated using the formula given by missing citation. The quantities A and «alpha» from missing citation were assumed to be identical.
1.23100.CN/A 
1.23200.CN/A 
1.23100.TN/A 
1.23100.QN/A missing citation refer to several references in their list of Henry's law constants but they don't assign them to specific species.
1.33100.N/AN/A 
1.23200.XN/AThe value is taken from the compilation of solubilities by W. Asman (unpublished).
1.2 XN/AValue given here as quoted by missing citation.
1.2 CN/A 
1.32800.XN/A 
1.23000.LN/A 
1.42800.LN/A 
1.23100.XN/AThe value is taken from the compilation of solubilities by W. Asman (unpublished).
1.1 cN/A 
1.23100.cN/A 
1.23200.XN/AThe value is taken from the compilation of solubilities by W. Asman (unpublished).

Gas phase ion energetics data

Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Ion clustering data, IR Spectrum, 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:
MM - Michael M. Meot-Ner (Mautner)
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
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
B - John E. Bartmess

View reactions leading to O2S+ (ion structure unspecified)

Quantity Value Units Method Reference Comment
IE (evaluated)12.349 ± 0.001eVN/AN/AL
Quantity Value Units Method Reference Comment
Proton affinity (review)672.3kJ/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity643.3kJ/molN/AHunter and Lias, 1998HL

Electron affinity determinations

EA (eV) Method Reference Comment
1.1070 ± 0.0080LPESNimlos and Ellison, 1986B
1.097 ± 0.036LPESCelotta, Bennett, et al., 1974B
1.10 ± 0.10TDEqChowdhury, Heinis, et al., 1986«DELTA»Gea(423 K) = -26.1 kcal/mol; «DELTA»Sea (estimated) = +2.0 eu. Original: Caldwell and Kebarle, 19842. Not direct measurement, but anchor for extensiveEA equilibrium scale. See text.; B
1.10 ± 0.20IMRBGrabowski, VanDoren, et al., 1984B
1.04998EndoRefaey and Franklin, 1976B
1.00 ± 0.10EndoHughes, Lifschitz, et al., 1973B
1.00 ± 0.050PDFeldman, 1970B
1.06 ± 0.10IMRBKraus, Muller-Duysing, et al., 1961Between NH2-, C-; B
1.14 ± 0.15NBIERothe, Tang, et al., 1975B

Gas basicity at 298K

Gas basicity (review) (kJ/mol) Reference Comment
<622.Milligan, Fairley, et al., 1998Irreversible PT from SO2H+ to C2N2 shows GB(SO2) < GB(C2N2), and using GB(C2N2) for reference from this paper; MM
<607.Milligan, Fairley, et al., 1998Irreversible PT from SO2H+ to C2H2 shows GB(SO2) < (GB(C2H2) + 4.5 kcal/mol); MM

Ionization energy determinations

IE (eV) Method Reference Comment
12.5 ± 0.1EISnow and Thomas, 1990LL
12.3494 ± 0.0002PEWang, Lee, et al., 1987LBLHLM
12.5 ± 0.3EIOrient and Srivastava, 1984LBLHLM
12.4 ± 0.2EISmith and Stevenson, 1981LLK
12.3PELloyd and Roberts, 1973LLK
12.31PEBock, Solouki, et al., 1973LLK
12.30 ± 0.01PEEland and Danby, 1968RDSH
12.32 ± 0.01PIDibeler and Liston, 1968RDSH
12.34SGolomb, Watanabe, et al., 1962RDSH
12.34 ± 0.02PIWatanabe, 1957RDSH
12.50PEKimura, Katsumata, et al., 1981Vertical value; LLK
12.54PEKroner, Strack, et al., 1973Vertical value; LLK
12.50PEChadwick, Frost, et al., 1973Vertical value; LLK

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
O+23.5 ± 0.5SOEIOrient and Srivastava, 1984LBLHLM
O+20.6SOEIReese, Dibeter, et al., 1958RDSH
OS+16.5 ± 0.5OEIOrient and Srivastava, 1984LBLHLM
OS+16.2 ± 0.2OEISmith and Stevenson, 1981LLK
OS+15.930 ± 0.005OPEWeiss, Hsieh, et al., 1979LLK
SO+15.81 ± 0.02OPIDibeler and Liston, 1968RDSH
O2+17.5 ± 0.3SEIReese, Dibeter, et al., 1958RDSH
S+16.5 ± 0.5O2/2OEIOrient and Srivastava, 1984LBLHLM
S+22.2OEISmith and Stevenson, 1981LLK
S+16.334O2/2OPEWeiss, Hsieh, et al., 1979LLK
S+17.5 ± 0.3O2EIReese, Dibeter, et al., 1958RDSH

Ion clustering data

Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, IR Spectrum, 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:
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
B - John E. Bartmess

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

(Bromine anion bullet Hydrogen bromide) + Sulfur dioxide = (Bromine anion bullet Sulfur dioxide bullet Hydrogen bromide)

By formula: (Br- bullet HBr) + O2S = (Br- bullet O2S bullet HBr)

Quantity Value Units Method Reference Comment
Deltar45.6kJ/molPHPMSCaldwell and Kebarle, 1985gas phase; M
Quantity Value Units Method Reference Comment
Deltar79.1J/mol*KPHPMSCaldwell and Kebarle, 1985gas phase; M

(Bromine anion bullet Hydrogen chloride) + Sulfur dioxide = (Bromine anion bullet Sulfur dioxide bullet Hydrogen chloride)

By formula: (Br- bullet HCl) + O2S = (Br- bullet O2S bullet HCl)

Quantity Value Units Method Reference Comment
Deltar50.6kJ/molPHPMSCaldwell and Kebarle, 1985gas phase; M
Quantity Value Units Method Reference Comment
Deltar77.8J/mol*KPHPMSCaldwell and Kebarle, 1985gas phase; M

Bromine anion + Sulfur dioxide = (Bromine anion bullet Sulfur dioxide)

By formula: Br- + O2S = (Br- bullet O2S)

Quantity Value Units Method Reference Comment
Deltar80.8 ± 8.4kJ/molTDAsCaldwell and Kebarle, 1985gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar92.0J/mol*KPHPMSCaldwell and Kebarle, 1985gas phase; M
Quantity Value Units Method Reference Comment
Deltar53. ± 11.kJ/molTDAsCaldwell and Kebarle, 1985gas phase; B

(Bromine anion bullet Sulfur dioxide) + Sulfur dioxide = (Bromine anion bullet 2Sulfur dioxide)

By formula: (Br- bullet O2S) + O2S = (Br- bullet 2O2S)

Quantity Value Units Method Reference Comment
Deltar46.9kJ/molPHPMSCaldwell and Kebarle, 1985gas phase; M
Quantity Value Units Method Reference Comment
Deltar78.2J/mol*KPHPMSCaldwell and Kebarle, 1985gas phase; M

(Bromine anion bullet 2Sulfur dioxide) + Sulfur dioxide = (Bromine anion bullet 3Sulfur dioxide)

By formula: (Br- bullet 2O2S) + O2S = (Br- bullet 3O2S)

Quantity Value Units Method Reference Comment
Deltar36.kJ/molPHPMSCaldwell and Kebarle, 1985gas phase; M
Quantity Value Units Method Reference Comment
Deltar57.7J/mol*KPHPMSCaldwell and Kebarle, 1985gas phase; M

Methyl cation + Sulfur dioxide = (Methyl cation bullet Sulfur dioxide)

By formula: CH3+ + O2S = (CH3+ bullet O2S)

Quantity Value Units Method Reference Comment
Deltar254.kJ/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 202. kJ/mol; Foster, Williamson, et al., 1974; M

CN- + Sulfur dioxide = (CN- bullet Sulfur dioxide)

By formula: CN- + O2S = (CN- bullet O2S)

Quantity Value Units Method Reference Comment
Deltar90.8 ± 3.3kJ/molTDAsLarson, Szulejko, et al., 1988gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar120.J/mol*KPHPMSLarson, Szulejko, et al., 1988gas phase; M
Quantity Value Units Method Reference Comment
Deltar56.07 ± 0.84kJ/molTDAsLarson, Szulejko, et al., 1988gas phase; B

CO3- + Sulfur dioxide = (CO3- bullet Sulfur dioxide)

By formula: CO3- + O2S = (CO3- bullet O2S)

Quantity Value Units Method Reference Comment
Deltar59.kJ/molHPMSKeesee, Lee, et al., 1980gas phase; switching reaction(O-)CO2, Entropy change calculated or estimated; Fehsenfeld and Ferguson, 1974; M
Quantity Value Units Method Reference Comment
Deltar84.J/mol*KN/AKeesee, Lee, et al., 1980gas phase; switching reaction(O-)CO2, Entropy change calculated or estimated; Fehsenfeld and Ferguson, 1974; M

Free energy of reaction

DeltarG° (kJ/mol) T (K) Method Reference Comment
33.296.HPMSKeesee, Lee, et al., 1980gas phase; switching reaction(O-)CO2, Entropy change calculated or estimated; Fehsenfeld and Ferguson, 1974; M

C4H6+ + Sulfur dioxide = (C4H6+ bullet Sulfur dioxide)

By formula: C4H6+ + O2S = (C4H6+ bullet O2S)

Quantity Value Units Method Reference Comment
Deltar15.kJ/molPIGrover, Walters, et al., 1985gas phase; M

C4H8+ + Sulfur dioxide = (C4H8+ bullet Sulfur dioxide)

By formula: C4H8+ + O2S = (C4H8+ bullet O2S)

Quantity Value Units Method Reference Comment
Deltar10.kJ/molPIGrover, Walters, et al., 1985gas phase; M

C4H8+ + Sulfur dioxide = (C4H8+ bullet Sulfur dioxide)

By formula: C4H8+ + O2S = (C4H8+ bullet O2S)

Quantity Value Units Method Reference Comment
Deltar10.kJ/molPIGrover, Walters, et al., 1985gas phase; M

(Chlorine anion bullet Hydrogen chloride) + Sulfur dioxide = (Chlorine anion bullet Sulfur dioxide bullet Hydrogen chloride)

By formula: (Cl- bullet HCl) + O2S = (Cl- bullet O2S bullet HCl)

Quantity Value Units Method Reference Comment
Deltar51.5kJ/molPHPMSCaldwell and Kebarle, 1985gas phase; M
Quantity Value Units Method Reference Comment
Deltar77.4J/mol*KPHPMSCaldwell and Kebarle, 1985gas phase; M

(Chlorine anion bullet Water) + Sulfur dioxide = (Chlorine anion bullet Sulfur dioxide bullet Water)

By formula: (Cl- bullet H2O) + O2S = (Cl- bullet O2S bullet H2O)

Quantity Value Units Method Reference Comment
Deltar72.8kJ/molHPMSUpschulte, Schelling, et al., 1984gas phase; M
Quantity Value Units Method Reference Comment
Deltar84.5J/mol*KHPMSUpschulte, Schelling, et al., 1984gas phase; M

Free energy of reaction

DeltarG° (kJ/mol) T (K) Method Reference Comment
48.1296.HPMSFehsenfeld and Ferguson, 1974gas phase; switching reaction(Cl- H2O)H2O; M

(Chlorine anion bullet 2Water) + Sulfur dioxide = (Chlorine anion bullet Sulfur dioxide bullet 2Water)

By formula: (Cl- bullet 2H2O) + O2S = (Cl- bullet O2S bullet 2H2O)

Quantity Value Units Method Reference Comment
Deltar59.0kJ/molHPMSUpschulte, Schelling, et al., 1984gas phase; From thermochemical cycle; M
Quantity Value Units Method Reference Comment
Deltar81.2J/mol*KHPMSUpschulte, Schelling, et al., 1984gas phase; From thermochemical cycle; M

Free energy of reaction

DeltarG° (kJ/mol) T (K) Method Reference Comment
35.296.HPMSUpschulte, Schelling, et al., 1984gas phase; From thermochemical cycle; M

Chlorine anion + Sulfur dioxide = (Chlorine anion bullet Sulfur dioxide)

By formula: Cl- + O2S = (Cl- bullet O2S)

Quantity Value Units Method Reference Comment
Deltar92.9 ± 8.4kJ/molTDAsCaldwell and Kebarle, 1985gas phase; B,M
Deltar87.4 ± 8.4kJ/molIMRELarson and McMahon, 1985gas phase; B
Deltar92.9 ± 9.2kJ/molTDEqBohringer, Fahey, et al., 1984gas phase; Relative to HOH..Cl- in Keesee, Lee, et al., 1980; B,M
Deltar91.21 ± 0.84kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B,M
Deltar87.4kJ/molICRLarson and McMahon, 1984gas phase; switching reaction(Cl-)t-C4H9OH, Entropy change calculated or estimated; French, Ikuta, et al., 1982; M
Quantity Value Units Method Reference Comment
Deltar90.4J/mol*KPHPMSCaldwell and Kebarle, 1985gas phase; M
Deltar101.J/mol*KN/ABohringer, Fahey, et al., 1984gas phase; switching reaction(Cl-)H2O), Entropy change calculated or estimated; Keesee and Castleman, 1980; M
Deltar87.0J/mol*KN/ALarson and McMahon, 1984gas phase; switching reaction(Cl-)t-C4H9OH, Entropy change calculated or estimated; French, Ikuta, et al., 1982; M
Deltar97.1J/mol*KHPMSKeesee, Lee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
Deltar65.7 ± 8.4kJ/molTDAsCaldwell and Kebarle, 1985gas phase; B
Deltar61.5 ± 8.4kJ/molIMRELarson and McMahon, 1985gas phase; B
Deltar62.8 ± 6.7kJ/molTDEqBohringer, Fahey, et al., 1984gas phase; Relative to HOH..Cl- in Keesee, Lee, et al., 1980; B,M
Deltar61.9 ± 1.3kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B
Deltar61.5kJ/molICRLarson and McMahon, 1984gas phase; switching reaction(Cl-)t-C4H9OH, Entropy change calculated or estimated; French, Ikuta, et al., 1982; M

Free energy of reaction

DeltarG° (kJ/mol) T (K) Method Reference Comment
59.4296.FAFehsenfeld and Ferguson, 1974gas phase; switching reaction(Cl-)H2O; M

(Chlorine anion bullet Sulfur dioxide bullet Water) + Sulfur dioxide = (Chlorine anion bullet 2Sulfur dioxide bullet Water)

By formula: (Cl- bullet O2S bullet H2O) + O2S = (Cl- bullet 2O2S bullet H2O)

Quantity Value Units Method Reference Comment
Deltar49.4kJ/molHPMSUpschulte, Schelling, et al., 1984gas phase; From thermochemical cycle; M
Quantity Value Units Method Reference Comment
Deltar109.J/mol*KHPMSUpschulte, Schelling, et al., 1984gas phase; From thermochemical cycle; M

Free energy of reaction

DeltarG° (kJ/mol) T (K) Method Reference Comment
17.296.HPMSUpschulte, Schelling, et al., 1984gas phase; From thermochemical cycle; M

(Chlorine anion bullet Sulfur dioxide) + Sulfur dioxide = (Chlorine anion bullet 2Sulfur dioxide)

By formula: (Cl- bullet O2S) + O2S = (Cl- bullet 2O2S)

Quantity Value Units Method Reference Comment
Deltar51.5 ± 4.2kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B,M
Deltar51.5kJ/molPHPMSCaldwell and Kebarle, 1985gas phase; M
Quantity Value Units Method Reference Comment
Deltar84.5J/mol*KPHPMSCaldwell and Kebarle, 1985gas phase; M
Deltar95.0J/mol*KHPMSKeesee, Lee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
Deltar23. ± 9.2kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B

(Chlorine anion bullet 2Sulfur dioxide) + Sulfur dioxide = (Chlorine anion bullet 3Sulfur dioxide)

By formula: (Cl- bullet 2O2S) + O2S = (Cl- bullet 3O2S)

Quantity Value Units Method Reference Comment
Deltar41.84 ± 0.42kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar96.7J/mol*KHPMSKeesee, Lee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
Deltar13.0 ± 1.3kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B

(Chlorine anion bullet 3Sulfur dioxide) + Sulfur dioxide = (Chlorine anion bullet 4Sulfur dioxide)

By formula: (Cl- bullet 3O2S) + O2S = (Cl- bullet 4O2S)

Quantity Value Units Method Reference Comment
Deltar36.0 ± 0.84kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar97.1J/mol*KHPMSKeesee, Lee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
Deltar6.7 ± 4.2kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B

ClO4- + Sulfur dioxide = (ClO4- bullet Sulfur dioxide)

By formula: ClO4- + O2S = (ClO4- bullet O2S)

Quantity Value Units Method Reference Comment
Deltar23.8 ± 0.42kJ/molTDAsBanic and Iribarne, 1985gas phase; B

Free energy of reaction

DeltarG° (kJ/mol) T (K) Method Reference Comment
24.290.HPMSBanic and Iribarne, 1985gas phase; electric fields; M

(Cesium ion (1+) bullet Water) + Sulfur dioxide = (Cesium ion (1+) bullet Sulfur dioxide bullet Water)

By formula: (Cs+ bullet H2O) + O2S = (Cs+ bullet O2S bullet H2O)

Free energy of reaction

DeltarG° (kJ/mol) T (K) Method Reference Comment
18.300.HPMSBanic and Iribarne, 1985gas phase; electric fields; M

(Cesium ion (1+) bullet 2Water) + Sulfur dioxide = (Cesium ion (1+) bullet Sulfur dioxide bullet 2Water)

By formula: (Cs+ bullet 2H2O) + O2S = (Cs+ bullet O2S bullet 2H2O)

Free energy of reaction

DeltarG° (kJ/mol) T (K) Method Reference Comment
15.300.HPMSBanic and Iribarne, 1985gas phase; electric fields; M

Cesium ion (1+) + Sulfur dioxide = (Cesium ion (1+) bullet Sulfur dioxide)

By formula: Cs+ + O2S = (Cs+ bullet O2S)

Quantity Value Units Method Reference Comment
Deltar45.2kJ/molDTMcKnight and Sawina, 1972gas phase; M
Quantity Value Units Method Reference Comment
Deltar79.1J/mol*KDTMcKnight and Sawina, 1972gas phase; M

Free energy of reaction

DeltarG° (kJ/mol) T (K) Method Reference Comment
22.300.HPMSBanic and Iribarne, 1985gas phase; electric fields; M

Fluorine anion + Sulfur dioxide = (Fluorine anion bullet Sulfur dioxide)

By formula: F- + O2S = (F- bullet O2S)

Quantity Value Units Method Reference Comment
Deltar225. ± 9.2kJ/molCIDTLobring, Check, et al., 2003gas phase; B
Deltar222. ± 10.kJ/molCIDTSquires, 1992gas phase; B
Deltar183.kJ/molICRLarson and McMahon, 1985gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Deltar183. ± 8.4kJ/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,M
Deltar250.kJ/molSAMSRobbiani and Franklin, 1979gas phase; Cl- + CO2ClF --> SO2F- + Cl2, «DELTA»rH>; M
Quantity Value Units Method Reference Comment
Deltar100.J/mol*KN/ALarson and McMahon, 1985gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Deltar96.2J/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
Deltar153.kJ/molICRLarson and McMahon, 1985gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Deltar154. ± 8.4kJ/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,M

Hydrogen anion + Sulfur dioxide = (Hydrogen anion bullet Sulfur dioxide)

By formula: H- + O2S = (H- bullet O2S)

Quantity Value Units Method Reference Comment
Deltar260. ± 67.kJ/molIMRBSheldon, Currie, et al., 1985gas phase; B
Quantity Value Units Method Reference Comment
Deltar240. ± 67.kJ/molIMRBSheldon, Currie, et al., 1985gas phase; B

HO- + Sulfur dioxide = (HO- bullet Sulfur dioxide)

By formula: HO- + O2S = (HO- bullet O2S)

Quantity Value Units Method Reference Comment
Deltar259. ± 12.kJ/molCIDTSquires, 1992gas phase; Dissociative protonation between HCl, MeCHClCO2H; B
Deltar>213. ± 13.kJ/molIMRBHierl and Paulson, 1984gas phase; CO2..HO- + SO2 ->. data revised per 92SQU; B

HO2S+ + Sulfur dioxide = (HO2S+ bullet Sulfur dioxide)

By formula: HO2S+ + O2S = (HO2S+ bullet O2S)

Quantity Value Units Method Reference Comment
Deltar89.1kJ/molPHPMSSzulejko and McMahon, 1992gas phase; M
Deltar97.1kJ/molPHPMSMcMahon and Kebarle, 1986gas phase; M
Quantity Value Units Method Reference Comment
Deltar108.J/mol*KPHPMSSzulejko and McMahon, 1992gas phase; M
Deltar115.J/mol*KPHPMSMcMahon and Kebarle, 1986gas phase; M

HO4S- + Sulfur dioxide = (HO4S- bullet Sulfur dioxide)

By formula: HO4S- + O2S = (HO4S- bullet O2S)

Quantity Value Units Method Reference Comment
Deltar57.3kJ/molHPMSKeesee and Castleman, 1986gas phase; M
Quantity Value Units Method Reference Comment
Deltar109.J/mol*KHPMSKeesee and Castleman, 1986gas phase; M

(Hydronium cation bullet 3Water) + Sulfur dioxide = (Hydronium cation bullet Sulfur dioxide bullet 3Water)

By formula: (H3O+ bullet 3H2O) + O2S = (H3O+ bullet O2S bullet 3H2O)

Free energy of reaction

DeltarG° (kJ/mol) T (K) Method Reference Comment
18.300.HPMSBanic and Iribarne, 1985gas phase; electric fields; M

(Hydronium cation bullet 4Water) + Sulfur dioxide = (Hydronium cation bullet Sulfur dioxide bullet 4Water)

By formula: (H3O+ bullet 4H2O) + O2S = (H3O+ bullet O2S bullet 4H2O)

Free energy of reaction

DeltarG° (kJ/mol) T (K) Method Reference Comment
11.300.HPMSBanic and Iribarne, 1985gas phase; electric fields; M
11.300.HPMSBanic and Iribarne, 1985gas phase; electric fields; M

Hydronium cation + Sulfur dioxide = (Hydronium cation bullet Sulfur dioxide)

By formula: H3O+ + O2S = (H3O+ bullet O2S)

Quantity Value Units Method Reference Comment
Deltar92.0kJ/molPHPMSSzulejko and McMahon, 1992gas phase; M
Quantity Value Units Method Reference Comment
Deltar95.0J/mol*KPHPMSSzulejko and McMahon, 1992gas phase; M

(NH4+ bullet Water) + Sulfur dioxide = (NH4+ bullet Sulfur dioxide bullet Water)

By formula: (H4N+ bullet H2O) + O2S = (H4N+ bullet O2S bullet H2O)

Free energy of reaction

DeltarG° (kJ/mol) T (K) Method Reference Comment
27.300.HPMSBanic and Iribarne, 1985gas phase; electric fields; M

(NH4+ bullet 2Water) + Sulfur dioxide = (NH4+ bullet Sulfur dioxide bullet 2Water)

By formula: (H4N+ bullet 2H2O) + O2S = (H4N+ bullet O2S bullet 2H2O)

Free energy of reaction

DeltarG° (kJ/mol) T (K) Method Reference Comment
21.300.HPMSBanic and Iribarne, 1985gas phase; electric fields; M

(NH4+ bullet 3Water) + Sulfur dioxide = (NH4+ bullet Sulfur dioxide bullet 3Water)

By formula: (H4N+ bullet 3H2O) + O2S = (H4N+ bullet O2S bullet 3H2O)

Free energy of reaction

DeltarG° (kJ/mol) T (K) Method Reference Comment
15.300.HPMSBanic and Iribarne, 1985gas phase; electric fields; M

(Iodide bullet Water) + Sulfur dioxide = (Iodide bullet Sulfur dioxide bullet Water)

By formula: (I- bullet H2O) + O2S = (I- bullet O2S bullet H2O)

Quantity Value Units Method Reference Comment
Deltar37.7 ± 0.42kJ/molTDAsBanic and Iribarne, 1985gas phase; B

Free energy of reaction

DeltarG° (kJ/mol) T (K) Method Reference Comment
30.300.HPMSBanic and Iribarne, 1985gas phase; electric fields; M

Iodide + Sulfur dioxide = (Iodide bullet Sulfur dioxide)

By formula: I- + O2S = (I- bullet O2S)

Quantity Value Units Method Reference Comment
Deltar59.8 ± 8.4kJ/molTDAsCaldwell and Kebarle, 1985gas phase; B,M
Deltar53.97 ± 0.42kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar73.6J/mol*KPHPMSCaldwell and Kebarle, 1985gas phase; M
Deltar84.5J/mol*KHPMSKeesee, Lee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
Deltar38. ± 11.kJ/molTDAsCaldwell and Kebarle, 1985gas phase; B
Deltar7.11 ± 0.42kJ/molTDAsBanic and Iribarne, 1985gas phase; B
Deltar28.5 ± 0.84kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B

Free energy of reaction

DeltarG° (kJ/mol) T (K) Method Reference Comment
38.301.HPMSBanic and Iribarne, 1985gas phase; electric fields; M

(Iodide bullet Sulfur dioxide bullet Water) + Sulfur dioxide = (Iodide bullet 2Sulfur dioxide bullet Water)

By formula: (I- bullet O2S bullet H2O) + O2S = (I- bullet 2O2S bullet H2O)

Quantity Value Units Method Reference Comment
Deltar29.7 ± 0.42kJ/molTDAsBanic and Iribarne, 1985gas phase; B

(Iodide bullet Sulfur dioxide) + Sulfur dioxide = (Iodide bullet 2Sulfur dioxide)

By formula: (I- bullet O2S) + O2S = (I- bullet 2O2S)

Quantity Value Units Method Reference Comment
Deltar42.26 ± 0.42kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar90.4J/mol*KHPMSKeesee, Lee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
Deltar15.1 ± 1.3kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B

(Iodide bullet 2Sulfur dioxide) + Sulfur dioxide = (Iodide bullet 3Sulfur dioxide)

By formula: (I- bullet 2O2S) + O2S = (I- bullet 3O2S)

Quantity Value Units Method Reference Comment
Deltar38.5 ± 0.84kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar103.J/mol*KHPMSKeesee, Lee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
Deltar7.5 ± 2.5kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B

Nitric oxide anion + Sulfur dioxide = (Nitric oxide anion bullet Sulfur dioxide)

By formula: NO- + O2S = (NO- bullet O2S)

Free energy of reaction

DeltarG° (kJ/mol) T (K) Method Reference Comment
33.296.SAMSVanderhoff and Heimerl, 1977gas phase; switching reaction(NO+)NO; Puckett and Teague, 1971; M

Nitrogen oxide anion + Sulfur dioxide = (Nitrogen oxide anion bullet Sulfur dioxide)

By formula: NO2- + O2S = (NO2- bullet O2S)

Quantity Value Units Method Reference Comment
Deltar108.4 ± 0.84kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B,M
Deltar102. ± 4.2kJ/molTDEqBohringer, Fahey, et al., 1984gas phase; Relative to HOH..NO2-, Keesee, Lee, et al., 1980; B,M
Quantity Value Units Method Reference Comment
Deltar154.J/mol*KHPMSKeesee, Lee, et al., 1980gas phase; M
Deltar132.J/mol*KN/ABohringer, Fahey, et al., 1984gas phase; switching reaction(NO2-)H2O, Entropy change calculated or estimated; Lee, Keesee, et al., 1980; M
Quantity Value Units Method Reference Comment
Deltar62.3 ± 1.3kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B

(Nitrogen oxide anion bullet Sulfur dioxide) + Sulfur dioxide = (Nitrogen oxide anion bullet 2Sulfur dioxide)

By formula: (NO2- bullet O2S) + O2S = (NO2- bullet 2O2S)

Quantity Value Units Method Reference Comment
Deltar37.7 ± 0.84kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B,M
Deltar41.kJ/molHPMSWlodek, Luczynski, et al., 1983gas phase; M
Quantity Value Units Method Reference Comment
Deltar90.0J/mol*KHPMSWlodek, Luczynski, et al., 1983gas phase; M
Deltar70.3J/mol*KHPMSKeesee, Lee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
Deltar16.7 ± 1.7kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B

(Nitrogen oxide anion bullet 2Sulfur dioxide) + Sulfur dioxide = (Nitrogen oxide anion bullet 3Sulfur dioxide)

By formula: (NO2- bullet 2O2S) + O2S = (NO2- bullet 3O2S)

Quantity Value Units Method Reference Comment
Deltar27.6 ± 0.84kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar56.1J/mol*KHPMSKeesee, Lee, et al., 1980gas phase; Entropy change is questionable; M
Quantity Value Units Method Reference Comment
Deltar10.9 ± 3.3kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B

(NO3 anion bullet Water) + Sulfur dioxide = (NO3 anion bullet Sulfur dioxide bullet Water)

By formula: (NO3- bullet H2O) + O2S = (NO3- bullet O2S bullet H2O)

Quantity Value Units Method Reference Comment
Deltar30.kJ/molHPMSBanic and Iribarne, 1985gas phase; From thermochemical cycle,switching reaction, electric fields; M

NO3 anion + Sulfur dioxide = (NO3 anion bullet Sulfur dioxide)

By formula: NO3- + O2S = (NO3- bullet O2S)

Quantity Value Units Method Reference Comment
Deltar72.0 ± 8.4kJ/molTDEqBohringer, Fahey, et al., 1984gas phase; Relative to HOH..NO3-, Keesee, Lee, et al., 1980; B,M
Deltar76.1 ± 5.0kJ/molTDAsWlodek, Luczynski, et al., 1983gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar105.J/mol*KN/ABohringer, Fahey, et al., 1984gas phase; switching reaction(NO3-)H2O, Entropy change calculated or estimated; Lee, Keesee, et al., 1980; M
Deltar132.J/mol*KHPMSWlodek, Luczynski, et al., 1983gas phase; M
Quantity Value Units Method Reference Comment
Deltar40. ± 8.4kJ/molTDEqBohringer, Fahey, et al., 1984gas phase; Relative to HOH..NO3-, Keesee, Lee, et al., 1980; B,M
Deltar41.84 ± 0.42kJ/molTDAsBanic and Iribarne, 1985gas phase; B
Deltar36.8 ± 3.8kJ/molTDAsWlodek, Luczynski, et al., 1983gas phase; B
Deltar44.4kJ/molFAFehsenfeld and Ferguson, 1974gas phase; switching reaction(NO3-)SO2, Entropy change calculated or estimated; Lee, Keesee, et al., 1980; M

Free energy of reaction

DeltarG° (kJ/mol) T (K) Method Reference Comment
41.8299.HPMSBanic and Iribarne, 1985gas phase; electric fields; M

(NO3 anion bullet Sulfur dioxide) + Sulfur dioxide = (NO3 anion bullet 2Sulfur dioxide)

By formula: (NO3- bullet O2S) + O2S = (NO3- bullet 2O2S)

Quantity Value Units Method Reference Comment
Deltar37.kJ/molHPMSWlodek, Luczynski, et al., 1983gas phase; Entropy change is questionable; M
Quantity Value Units Method Reference Comment
Deltar59.0J/mol*KHPMSWlodek, Luczynski, et al., 1983gas phase; Entropy change is questionable; M

(Sodium ion (1+) bullet Water) + Sulfur dioxide = (Sodium ion (1+) bullet Sulfur dioxide bullet Water)

By formula: (Na+ bullet H2O) + O2S = (Na+ bullet O2S bullet H2O)

Quantity Value Units Method Reference Comment
Deltar59.0kJ/molHPMSUpschulte, Schelling, et al., 1984gas phase; M
Quantity Value Units Method Reference Comment
Deltar72.8J/mol*KHPMSUpschulte, Schelling, et al., 1984gas phase; M

(Sodium ion (1+) bullet 3Water) + Sulfur dioxide = (Sodium ion (1+) bullet Sulfur dioxide bullet 3Water)

By formula: (Na+ bullet 3H2O) + O2S = (Na+ bullet O2S bullet 3H2O)

Quantity Value Units Method Reference Comment
Deltar20.kJ/molHPMSBanic and Iribarne, 1985gas phase; electric fields; M

Sodium ion (1+) + Sulfur dioxide = (Sodium ion (1+) bullet Sulfur dioxide)

By formula: Na+ + O2S = (Na+ bullet O2S)

Quantity Value Units Method Reference Comment
Deltar79.1kJ/molFAPerry, Rowe, et al., 1980gas phase; Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
Deltar84.9J/mol*KN/APerry, Rowe, et al., 1980gas phase; Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
Deltar53.6kJ/molFAPerry, Rowe, et al., 1980gas phase; Entropy change calculated or estimated; M

(Sodium ion (1+) bullet Sulfur dioxide) + Sulfur dioxide = (Sodium ion (1+) bullet 2Sulfur dioxide)

By formula: (Na+ bullet O2S) + O2S = (Na+ bullet 2O2S)

Quantity Value Units Method Reference Comment
Deltar69.5kJ/molHPMSCastleman, Peterson, et al., 1983gas phase; M
Quantity Value Units Method Reference Comment
Deltar107.J/mol*KHPMSCastleman, Peterson, et al., 1983gas phase; M

(Sodium ion (1+) bullet 2Sulfur dioxide) + Sulfur dioxide = (Sodium ion (1+) bullet 3Sulfur dioxide)

By formula: (Na+ bullet 2O2S) + O2S = (Na+ bullet 3O2S)

Quantity Value Units Method Reference Comment
Deltar59.8kJ/molHPMSCastleman, Peterson, et al., 1983gas phase; M
Quantity Value Units Method Reference Comment
Deltar113.J/mol*KHPMSCastleman, Peterson, et al., 1983gas phase; M

(Sodium ion (1+) bullet 3Sulfur dioxide) + Sulfur dioxide = (Sodium ion (1+) bullet 4Sulfur dioxide)

By formula: (Na+ bullet 3O2S) + O2S = (Na+ bullet 4O2S)

Quantity Value Units Method Reference Comment
Deltar51.5kJ/molHPMSCastleman, Peterson, et al., 1983gas phase; Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
Deltar110.J/mol*KN/ACastleman, Peterson, et al., 1983gas phase; Entropy change calculated or estimated; M

Free energy of reaction

DeltarG° (kJ/mol) T (K) Method Reference Comment
13.328.HPMSCastleman, Peterson, et al., 1983gas phase; Entropy change calculated or estimated; M

O- + Sulfur dioxide = (O- bullet Sulfur dioxide)

By formula: O- + O2S = (O- bullet O2S)

Quantity Value Units Method Reference Comment
Deltar250.kJ/molFAFehsenfeld and Ferguson, 1974gas phase; switching reaction(O-)CO2, «DELTA»rH>; Hiller and Vestal, 1980, Keesee and Castleman, 1986; M

(O- bullet Sulfur dioxide) + Sulfur dioxide = (O- bullet 2Sulfur dioxide)

By formula: (O- bullet O2S) + O2S = (O- bullet 2O2S)

Quantity Value Units Method Reference Comment
Deltar55.6kJ/molHPMSKeesee, Lee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
Deltar79.1J/mol*KHPMSKeesee, Lee, et al., 1980gas phase; M

OS+ + Sulfur dioxide = (OS+ bullet Sulfur dioxide)

By formula: OS+ + O2S = (OS+ bullet O2S)

Quantity Value Units Method Reference Comment
Deltar57.7kJ/molPIErickson and Ng, 1981gas phase; M

Oxygen cation + Sulfur dioxide = (Oxygen cation bullet Sulfur dioxide)

By formula: O2+ + O2S = (O2+ bullet O2S)

Quantity Value Units Method Reference Comment
Deltar40.kJ/molFAAdams and Bohme, 1970gas phase; switching reaction(O2+)O2; Conway and Janik, 1970; M

O2S+ + Sulfur dioxide = (O2S+ bullet Sulfur dioxide)

By formula: O2S+ + O2S = (O2S+ bullet O2S)

Quantity Value Units Method Reference Comment
Deltar63.6kJ/molPIErickson and Ng, 1981gas phase; M

O2S- + Sulfur dioxide = (O2S- bullet Sulfur dioxide)

By formula: O2S- + O2S = (O2S- bullet O2S)

Quantity Value Units Method Reference Comment
Deltar100.4 ± 0.84kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B,M
Deltar89.1 ± 5.4kJ/molTDAsVacher, Leduc, et al., 1994gas phase; B
Deltar77.40kJ/molN/ADresch, Kramer, et al., 1991gas phase; Both dissociation and electron detachment?; B
Deltar76.57kJ/molN/ASnodgrass, Coe, et al., 1988gas phase; Appears to be dissociation + electron detachment; B
Quantity Value Units Method Reference Comment
Deltar141.J/mol*KHPMSKeesee, Lee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
Deltar58.2 ± 1.7kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B
Deltar43.5 ± 9.2kJ/molTDAsVacher, Leduc, et al., 1994gas phase; B

(O2S- bullet 5Sulfur dioxide bullet 2Water) + Sulfur dioxide = (O2S- bullet 6Sulfur dioxide bullet 2Water)

By formula: (O2S- bullet 5O2S bullet 2H2O) + O2S = (O2S- bullet 6O2S bullet 2H2O)

Quantity Value Units Method Reference Comment
Deltar15.9 ± 3.8kJ/molTDAsVacher, Leduc, et al., 1994gas phase; B
Quantity Value Units Method Reference Comment
Deltar4.60 ± 0.84kJ/molTDAsVacher, Leduc, et al., 1994gas phase; B

(O2S- bullet 6Sulfur dioxide bullet Water) + Sulfur dioxide = (O2S- bullet 7Sulfur dioxide bullet Water)

By formula: (O2S- bullet 6O2S bullet H2O) + O2S = (O2S- bullet 7O2S bullet H2O)

Quantity Value Units Method Reference Comment
Deltar13.4 ± 2.5kJ/molTDAsVacher, Leduc, et al., 1994gas phase; B
Quantity Value Units Method Reference Comment
Deltar2.9 ± 0.84kJ/molTDAsVacher, Leduc, et al., 1994gas phase; B

(O2S- bullet 6Sulfur dioxide bullet 2Water) + Sulfur dioxide = (O2S- bullet 7Sulfur dioxide bullet 2Water)

By formula: (O2S- bullet 6O2S bullet 2H2O) + O2S = (O2S- bullet 7O2S bullet 2H2O)

Quantity Value Units Method Reference Comment
Deltar15.5 ± 2.9kJ/molTDAsVacher, Leduc, et al., 1994gas phase; B
Quantity Value Units Method Reference Comment
Deltar2.5 ± 0.84kJ/molTDAsVacher, Leduc, et al., 1994gas phase; B

(O2S- bullet Sulfur dioxide) + Sulfur dioxide = (O2S- bullet 2Sulfur dioxide)

By formula: (O2S- bullet O2S) + O2S = (O2S- bullet 2O2S)

Quantity Value Units Method Reference Comment
Deltar33.9 ± 1.3kJ/molTDAsVacher, Jorda, et al., 1992gas phase; B
Deltar35.kJ/molHPMSKeesee, Lee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
Deltar66.9J/mol*KHPMSKeesee, Lee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
Deltar16.3 ± 0.84kJ/molTDAsVacher, Jorda, et al., 1992gas phase; B

(O2S- bullet 2Sulfur dioxide) + Sulfur dioxide = (O2S- bullet 3Sulfur dioxide)

By formula: (O2S- bullet 2O2S) + O2S = (O2S- bullet 3O2S)

Quantity Value Units Method Reference Comment
Deltar26.8 ± 0.84kJ/molTDAsVacher, Jorda, et al., 1992gas phase; B
Quantity Value Units Method Reference Comment
Deltar12.6 ± 0.84kJ/molTDAsVacher, Jorda, et al., 1992gas phase; B

(O2S- bullet 3Sulfur dioxide) + Sulfur dioxide = (O2S- bullet 4Sulfur dioxide)

By formula: (O2S- bullet 3O2S) + O2S = (O2S- bullet 4O2S)

Quantity Value Units Method Reference Comment
Deltar22.6 ± 1.3kJ/molTDAsVacher, Jorda, et al., 1992gas phase; B
Quantity Value Units Method Reference Comment
Deltar9.20 ± 0.84kJ/molTDAsVacher, Jorda, et al., 1992gas phase; B

(O2S- bullet 4Sulfur dioxide) + Sulfur dioxide = (O2S- bullet 5Sulfur dioxide)

By formula: (O2S- bullet 4O2S) + O2S = (O2S- bullet 5O2S)

Quantity Value Units Method Reference Comment
Deltar17.6 ± 0.84kJ/molTDAsVacher, Jorda, et al., 1992gas phase; B
Quantity Value Units Method Reference Comment
Deltar5.02 ± 0.84kJ/molTDAsVacher, Jorda, et al., 1992gas phase; B

(O2S- bullet 5Sulfur dioxide) + Sulfur dioxide = (O2S- bullet 6Sulfur dioxide)

By formula: (O2S- bullet 5O2S) + O2S = (O2S- bullet 6O2S)

Quantity Value Units Method Reference Comment
Deltar15.1 ± 1.3kJ/molTDAsVacher, Jorda, et al., 1992gas phase; B
Quantity Value Units Method Reference Comment
Deltar3.8 ± 0.84kJ/molTDAsVacher, Jorda, et al., 1992gas phase; B

(O2S- bullet 6Sulfur dioxide) + Sulfur dioxide = (O2S- bullet 7Sulfur dioxide)

By formula: (O2S- bullet 6O2S) + O2S = (O2S- bullet 7O2S)

Quantity Value Units Method Reference Comment
Deltar14.2 ± 0.84kJ/molTDAsVacher, Jorda, et al., 1992gas phase; B
Quantity Value Units Method Reference Comment
Deltar2.1 ± 0.84kJ/molTDAsVacher, Jorda, et al., 1992gas phase; B

(O2S- bullet 7Sulfur dioxide) + Sulfur dioxide = (O2S- bullet 8Sulfur dioxide)

By formula: (O2S- bullet 7O2S) + O2S = (O2S- bullet 8O2S)

Quantity Value Units Method Reference Comment
Deltar14.2 ± 1.3kJ/molTDAsVacher, Jorda, et al., 1992gas phase; B
Quantity Value Units Method Reference Comment
Deltar1. ± 5.0kJ/molTDAsVacher, Jorda, et al., 1992gas phase; B

(O2S- bullet 8Sulfur dioxide) + Sulfur dioxide = (O2S- bullet 9Sulfur dioxide)

By formula: (O2S- bullet 8O2S) + O2S = (O2S- bullet 9O2S)

Quantity Value Units Method Reference Comment
Deltar12.6 ± 1.7kJ/molTDAsVacher, Jorda, et al., 1992gas phase; B
Quantity Value Units Method Reference Comment
Deltar1. ± 6.3kJ/molTDAsVacher, Jorda, et al., 1992gas phase; B

(O2S- bullet 9Sulfur dioxide) + Sulfur dioxide = (O2S- bullet 10Sulfur dioxide)

By formula: (O2S- bullet 9O2S) + O2S = (O2S- bullet 10O2S)

Quantity Value Units Method Reference Comment
Deltar12.6 ± 2.5kJ/molTDAsVacher, Jorda, et al., 1992gas phase; B
Quantity Value Units Method Reference Comment
Deltar0.4 ± 9.6kJ/molTDAsVacher, Jorda, et al., 1992gas phase; B

(O2S- bullet Sulfur dioxide bullet Oxygen) + Sulfur dioxide = (O2S- bullet 2Sulfur dioxide bullet Oxygen)

By formula: (O2S- bullet O2S bullet O2) + O2S = (O2S- bullet 2O2S bullet O2)

Quantity Value Units Method Reference Comment
Deltar19.2 ± 1.7kJ/molTDAsVacher, Jorda, et al., 1992gas phase; B
Quantity Value Units Method Reference Comment
Deltar10. ± 8.4kJ/molTDAsVacher, Jorda, et al., 1992gas phase; B

(O2S- bullet 2Sulfur dioxide bullet Oxygen) + Sulfur dioxide = (O2S- bullet 3Sulfur dioxide bullet Oxygen)

By formula: (O2S- bullet 2O2S bullet O2) + O2S = (O2S- bullet 3O2S bullet O2)

Quantity Value Units Method Reference Comment
Deltar15.1 ± 1.7kJ/molTDAsVacher, Jorda, et al., 1992gas phase; B
Quantity Value Units Method Reference Comment
Deltar6. ± 13.kJ/molTDAsVacher, Jorda, et al., 1992gas phase; B

(O2S- bullet Oxygen) + Sulfur dioxide = (O2S- bullet Sulfur dioxide bullet Oxygen)

By formula: (O2S- bullet O2) + O2S = (O2S- bullet O2S bullet O2)

Quantity Value Units Method Reference Comment
Deltar46.0 ± 4.2kJ/molTDAsVacher, Jorda, et al., 1992gas phase; B
Quantity Value Units Method Reference Comment
Deltar26. ± 9.2kJ/molTDAsVacher, Jorda, et al., 1992gas phase; B

O3S- + Sulfur dioxide = (O3S- bullet Sulfur dioxide)

By formula: O3S- + O2S = (O3S- bullet O2S)

Quantity Value Units Method Reference Comment
Deltar55.65 ± 0.42kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B
Quantity Value Units Method Reference Comment
Deltar31.8 ± 0.84kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B

(O3S- bullet Sulfur dioxide bullet Oxygen) + Sulfur dioxide = (O3S- bullet 2Sulfur dioxide bullet Oxygen)

By formula: (O3S- bullet O2S bullet O2) + O2S = (O3S- bullet 2O2S bullet O2)

Quantity Value Units Method Reference Comment
Deltar23.8 ± 2.5kJ/molTDAsVacher, Jorda, et al., 1992gas phase; B
Quantity Value Units Method Reference Comment
Deltar15. ± 8.8kJ/molTDAsVacher, Jorda, et al., 1992gas phase; B

(O3S- bullet Oxygen) + Sulfur dioxide = (O3S- bullet Sulfur dioxide bullet Oxygen)

By formula: (O3S- bullet O2) + O2S = (O3S- bullet O2S bullet O2)

Quantity Value Units Method Reference Comment
Deltar27.2 ± 3.3kJ/molTDAsVacher, Jorda, et al., 1992gas phase; B
Quantity Value Units Method Reference Comment
Deltar18. ± 9.2kJ/molTDAsVacher, Jorda, et al., 1992gas phase; B

O4S- + Sulfur dioxide = (O4S- bullet Sulfur dioxide)

By formula: O4S- + O2S = (O4S- bullet O2S)

Free energy of reaction

DeltarG° (kJ/mol) T (K) Method Reference Comment
28.296.FAFehsenfeld and Ferguson, 1974gas phase; switching reaction(SO4-)H2O; M

IR Spectrum

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

Data compiled by: Coblentz Society, Inc.

Data compiled by: Pamela M. Chu, Franklin R. Guenther, George C. Rhoderick, and Walter J. Lafferty


Mass spectrum (electron ionization)

Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, 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, 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.

Cox, Wagman, et al., 1984
Cox, J.D.; Wagman, D.D.; Medvedev, V.A., CODATA Key Values for Thermodynamics, Hemisphere Publishing Corp., New York, 1984, 1. [all data]

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Hoffman, K.R.; Vanderwerf, C.A., Addition Compounds of Sulfur Dioxide with Pyridine and the Picolines, J. Am. Chem. Soc., 1946, 68, 997. [all data]

Giauque and Stephenson, 1938
Giauque, W.F.; Stephenson, C.C., Sulfur Dioxide. The Heat Capacity of Solid and Liquid. Vapor Pressure. Heat of Vap. The Entropy Values from Termal and Molecular Data, J. Am. Chem. Soc., 1938, 60, 1389. [all data]

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Giauque and Stephenson, 1938, 2
Giauque, W.F.; Stephenson, C.C., Sulfur Dioxide. The Heat Capacity of Solid and Liquid. Vapor Pressure. Heat of Vaporization. The Entropy Values from Thermal and Molecular Data, J. Am. Chem. Soc., 1938, 60, 6, 1389-1394, https://doi.org/10.1021/ja01273a034 . [all data]

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Stull, Daniel R., Vapor Pressure of Pure Substances. Organic and Inorganic Compounds, Ind. Eng. Chem., 1947, 39, 4, 517-540, https://doi.org/10.1021/ie50448a022 . [all data]

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Caldwell, G.; Kebarle, P., The hydrogen bond energies of the bihalide ions XHX- and YHX-, Can. J. Chem., 1985, 63, 1399. [all data]

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Larson, J.W.; McMahon, T.B., Fluoride and chloride affinities of the main group oxides, fluorides, oxofluorides, and alkyls. Quantitative scales of lewis acidities from ICR halide exchange equilibria, J. Am. Chem. Soc., 1985, 107, 766. [all data]

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Bohringer, H.; Fahey, D.W.; Fehsenfeld, F.C.; Ferguson, E.E., Bond energies of the molecules H2O, SO2, H2O2, and HCl to various atmospheric negative ions, J. Chem. Phys., 1984, 81, 2805. [all data]

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Keesee, R.G.; Lee, N.; Castleman, A.W., Jr., Properties of clusters in the gas phase: V. Complexes of neutral molecules onto negative ions, J. Chem. Phys., 1980, 73, 2195. [all data]

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Larson, J.W.; McMahon, T.B., Gas phase negative ion chemistry of alkylchloroformates, Can. J. Chem., 1984, 62, 675. [all data]

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French, M.A.; Ikuta, S.; Kebarle, P., Hydrogen bonding of O-H and C-H hydrogen donors to Cl-. Results from mass spectrometric measurement of the ion-molecule equilibria RH + Cl- = RHCl-, Can. J. Chem., 1982, 60, 1907. [all data]

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Lobring, K.C.; Check, C.E.; Sunderlin, L.S., The fluoride affinity of SO2, Int. J. Mass Spectrom., 2003, 222, 1-3, 221-227, https://doi.org/10.1016/S1387-3806(02)00950-8 . [all data]

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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]

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Wlodek, Luczynski, et al., 1983
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Lee, Keesee, et al., 1980
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Banic and Iribarne, 1985
Banic, C.M.; Iribarne, J.V., Equilibrium Constants for Clustering of Neutral Molecules about Gaseous Ions, J. Chem. Phys., 1985, 83, 12, 6432, https://doi.org/10.1063/1.449543 . [all data]

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Vacher, J.R.; Leduc, E.; Fitaire, M., Stabilities of Anionic Mixed Clusters of Sulfur Dioxide and Water, Int. J. Mass Spectrom. Ion Proc., 1994, 135, 2-3, 139, https://doi.org/10.1016/0168-1176(94)03985-2 . [all data]

Dresch, Kramer, et al., 1991
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Snodgrass, J.T.; Coe, J.V.; Friedhoff, C.B.; McHugh, K.M.; Bowen, K.H., On the Photodissociation of (SO2)2-, J. Chem. Phys., 1988, 88, 12, 8014, https://doi.org/10.1063/1.454261 . [all data]

Upschulte, Schelling, et al., 1984
Upschulte, B.L.; Schelling, F.J.; Keesee, R.G.; Castleman, A.W., Thermochemical Properties of Gas Phase Mixed Clusters: Water and Sulfur Dioxide with Na+ and Cl-, Chem. Phys. Lett., 1984, 111, 4-5, 389, https://doi.org/10.1016/0009-2614(84)85526-8 . [all data]

Castleman, Peterson, et al., 1983
Castleman, A.W.; Peterson, K.I.; Upschulte, B.L.; Schelling, F.J., Energetics and Structure of Na+ Cluster Ions, Int. J. Mass Spectrom. Ion Phys., 1983, 47, 203, https://doi.org/10.1016/0020-7381(83)87171-X . [all data]

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Vacher, J.R.; Jorda, M.; Leduc, E.; Fitaire, M., A Determination of the Stabilities of Negative Ion Clusters in SO2 and SO2-O2 Mixtures, Int. J. Mass Spectrom. Ion Proc., 1992, 114, 3, 149, https://doi.org/10.1016/0168-1176(92)80033-W . [all data]

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Szulejko, J.; McMahon, T.B., personal communication, 1992. [all data]

McMahon and Kebarle, 1986
McMahon, T.B.; Kebarle, P., Strong hydrogen bonding in gas-phase ions: A high pressure mass spectrometric study of formation and energetics of methyl fluoride proton bound dimer, J. Am. Chem. Soc., 1986, 108, 6502. [all data]

Hierl and Paulson, 1984
Hierl, P.M.; Paulson, J.F., Translational energy dependence of cross sections for reactions of OH- (H2O)n with CO2 and SO2, J. Chem. Phys., 1984, 80, 4890. [all data]

Larson, Szulejko, et al., 1988
Larson, J.W.; Szulejko, J.E.; McMahon, T.B., Gas Phase Lewis Acid-Base Interactions. An Experimental Determination of Cyanide Binding Energies From Ion Cyclotron Resonance and High-Pressure Mass Spectrometric Equilibrium Measurements., J. Am. Chem. Soc., 1988, 110, 23, 7604, https://doi.org/10.1021/ja00231a004 . [all data]

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McKnight, L.G.; Sawina, J.M., Drift Velocities and Interactions of Cs+ Ions with Atmospheric Gases, J. Chem. Phys., 1972, 57, 12, 5156, https://doi.org/10.1063/1.1678205 . [all data]

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McMahon, T.; Heinis, T.; Nicol, G.; Hovey, J.K.; Kebarle, P., Methyl Cation Affinities, J. Am. Chem. Soc., 1988, 110, 23, 7591, https://doi.org/10.1021/ja00231a002 . [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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Nimlos, M.R.; Ellison, G.B., Photoelectron spectroscopy of SO2-, S3-, and S2O-, J. Phys. Chem., 1986, 90, 2574. [all data]

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Celotta, R.S.; Bennett, R.A.; Hall, J.L., Laser Photodetachment Determination of the Electron Affinities of OH, NH2, NH, SO2, and S2, J. Chem. Phys., 1974, 60, 5, 1740, https://doi.org/10.1063/1.1681268 . [all data]

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Grabowski, J.J.; VanDoren, J.M.; DePuy, C.H.; Bierbaum, V.M., Flowing Afterglow Studies of the Electron Affinity of SO2, J. Chem. Phys., 1984, 80, 1, 575, https://doi.org/10.1063/1.446412 . [all data]

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Hughes, B.M.; Lifschitz, C.; Tiernan, T.O., Electron affinities from endothermic negative-ion charge-transfer reactions. III. NO, NO2, S2, CS2, Cl2, Br2, I2, and C2H, J. Chem. Phys., 1973, 59, 3162. [all data]

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Notes

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