Sulfur dioxide

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Reaction thermochemistry data

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

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

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 • Sulfur dioxide)

By formula: Cl- + O2S = (Cl- • O2S)

Quantity Value Units Method Reference Comment
Δr92.9 ± 8.4kJ/molTDAsCaldwell and Kebarle, 1985gas phase; B,M
Δr87.4 ± 8.4kJ/molIMRELarson and McMahon, 1985gas phase; B
Δr92.9 ± 9.2kJ/molTDEqBohringer, Fahey, et al., 1984gas phase; Relative to HOH..Cl- in Keesee, Lee, et al., 1980; B,M
Δr91.21 ± 0.84kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B,M
Δr87.4kJ/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
Δr90.4J/mol*KPHPMSCaldwell and Kebarle, 1985gas phase; M
Δr101.J/mol*KN/ABohringer, Fahey, et al., 1984gas phase; switching reaction(Cl-)H2O), Entropy change calculated or estimated; Keesee and Castleman, 1980; M
Δr87.0J/mol*KN/ALarson and McMahon, 1984gas phase; switching reaction(Cl-)t-C4H9OH, Entropy change calculated or estimated; French, Ikuta, et al., 1982; M
Δr97.1J/mol*KHPMSKeesee, Lee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
Δr65.7 ± 8.4kJ/molTDAsCaldwell and Kebarle, 1985gas phase; B
Δr61.5 ± 8.4kJ/molIMRELarson and McMahon, 1985gas phase; B
Δr62.8 ± 6.7kJ/molTDEqBohringer, Fahey, et al., 1984gas phase; Relative to HOH..Cl- in Keesee, Lee, et al., 1980; B,M
Δr61.9 ± 1.3kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B
Δr61.5kJ/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

ΔrG° (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 • Sulfur dioxide)

By formula: F- + O2S = (F- • O2S)

Quantity Value Units Method Reference Comment
Δr225. ± 9.2kJ/molCIDTLobring, Check, et al., 2003gas phase; B
Δr222. ± 10.kJ/molCIDTSquires, 1992gas phase; B
Δr183.kJ/molICRLarson and McMahon, 1985gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Δr183. ± 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
Δr250.kJ/molSAMSRobbiani and Franklin, 1979gas phase; Cl- + CO2ClF --> SO2F- + Cl2, ΔrH>; M
Quantity Value Units Method Reference Comment
Δr100.J/mol*KN/ALarson and McMahon, 1985gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Δr96.2J/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
Δr153.kJ/molICRLarson and McMahon, 1985gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Δr154. ± 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 • Sulfur dioxide)

By formula: NO3- + O2S = (NO3- • O2S)

Quantity Value Units Method Reference Comment
Δr72.0 ± 8.4kJ/molTDEqBohringer, Fahey, et al., 1984gas phase; Relative to HOH..NO3-, Keesee, Lee, et al., 1980; B,M
Δr76.1 ± 5.0kJ/molTDAsWlodek, Luczynski, et al., 1983gas phase; B,M
Quantity Value Units Method Reference Comment
Δr105.J/mol*KN/ABohringer, Fahey, et al., 1984gas phase; switching reaction(NO3-)H2O, Entropy change calculated or estimated; Lee, Keesee, et al., 1980; M
Δr132.J/mol*KHPMSWlodek, Luczynski, et al., 1983gas phase; M
Quantity Value Units Method Reference Comment
Δr40. ± 8.4kJ/molTDEqBohringer, Fahey, et al., 1984gas phase; Relative to HOH..NO3-, Keesee, Lee, et al., 1980; B,M
Δr41.84 ± 0.42kJ/molTDAsBanic and Iribarne, 1985gas phase; B
Δr36.8 ± 3.8kJ/molTDAsWlodek, Luczynski, et al., 1983gas phase; B
Δr44.4kJ/molFAFehsenfeld and Ferguson, 1974gas phase; switching reaction(NO3-)SO2, Entropy change calculated or estimated; Lee, Keesee, et al., 1980; M

Free energy of reaction

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

Iodide + Sulfur dioxide = (Iodide • Sulfur dioxide)

By formula: I- + O2S = (I- • O2S)

Quantity Value Units Method Reference Comment
Δr59.8 ± 8.4kJ/molTDAsCaldwell and Kebarle, 1985gas phase; B,M
Δr53.97 ± 0.42kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B,M
Quantity Value Units Method Reference Comment
Δr73.6J/mol*KPHPMSCaldwell and Kebarle, 1985gas phase; M
Δr84.5J/mol*KHPMSKeesee, Lee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
Δr38. ± 11.kJ/molTDAsCaldwell and Kebarle, 1985gas phase; B
Δr7.11 ± 0.42kJ/molTDAsBanic and Iribarne, 1985gas phase; B
Δr28.5 ± 0.84kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B

Free energy of reaction

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

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

By formula: O2S- + O2S = (O2S- • O2S)

Quantity Value Units Method Reference Comment
Δr100.4 ± 0.84kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B,M
Δr89.1 ± 5.4kJ/molTDAsVacher, Leduc, et al., 1994gas phase; B
Δr77.40kJ/molN/ADresch, Kramer, et al., 1991gas phase; Both dissociation and electron detachment?; B
Δr76.57kJ/molN/ASnodgrass, Coe, et al., 1988gas phase; Appears to be dissociation + electron detachment; B
Quantity Value Units Method Reference Comment
Δr141.J/mol*KHPMSKeesee, Lee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
Δr58.2 ± 1.7kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B
Δr43.5 ± 9.2kJ/molTDAsVacher, Leduc, et al., 1994gas phase; B

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

By formula: NO2- + O2S = (NO2- • O2S)

Quantity Value Units Method Reference Comment
Δr108.4 ± 0.84kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B,M
Δr102. ± 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
Δr154.J/mol*KHPMSKeesee, Lee, et al., 1980gas phase; M
Δr132.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
Δr62.3 ± 1.3kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B

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

By formula: CO3- + O2S = (CO3- • O2S)

Quantity Value Units Method Reference Comment
Δr59.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
Δr84.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

ΔrG° (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 • Sulfur dioxide) + Water = (Chlorine anion • Water • Sulfur dioxide)

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

Bond type: Hydrogen bond (negative ion to hydride)

Quantity Value Units Method Reference Comment
Δr43.51kJ/molTDAsUpschulte, Schelling, et al., 1984gas phase; B,M
Quantity Value Units Method Reference Comment
Δr81.2J/mol*KHPMSUpschulte, Schelling, et al., 1984gas phase; M
Quantity Value Units Method Reference Comment
Δr19.2kJ/molTDAsUpschulte, Schelling, et al., 1984gas phase; B

Free energy of reaction

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

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

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

Quantity Value Units Method Reference Comment
Δr51.5 ± 4.2kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B,M
Δr51.5kJ/molPHPMSCaldwell and Kebarle, 1985gas phase; M
Quantity Value Units Method Reference Comment
Δr84.5J/mol*KPHPMSCaldwell and Kebarle, 1985gas phase; M
Δr95.0J/mol*KHPMSKeesee, Lee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
Δr23. ± 9.2kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B

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

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

Quantity Value Units Method Reference Comment
Δr37.7 ± 0.84kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B,M
Δr41.kJ/molHPMSWlodek, Luczynski, et al., 1983gas phase; M
Quantity Value Units Method Reference Comment
Δr90.0J/mol*KHPMSWlodek, Luczynski, et al., 1983gas phase; M
Δr70.3J/mol*KHPMSKeesee, Lee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
Δr16.7 ± 1.7kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B

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

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

Quantity Value Units Method Reference Comment
Δr51.5kJ/molHPMSCastleman, Peterson, et al., 1983gas phase; Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
Δr110.J/mol*KN/ACastleman, Peterson, et al., 1983gas phase; Entropy change calculated or estimated; M

Free energy of reaction

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

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

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

Bond type: Hydrogen bond (negative ion to hydride)

Quantity Value Units Method Reference Comment
Δr51.0kJ/molPHPMSCaldwell and Kebarle, 1985gas phase; From thermochemical cycle,switching reaction(Br- HBr)SO2; M
Quantity Value Units Method Reference Comment
Δr80.3J/mol*KPHPMSCaldwell and Kebarle, 1985gas phase; From thermochemical cycle,switching reaction(Br- HBr)SO2; M

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

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

Quantity Value Units Method Reference Comment
Δr49.4kJ/molHPMSUpschulte, Schelling, et al., 1984gas phase; From thermochemical cycle; M
Quantity Value Units Method Reference Comment
Δr109.J/mol*KHPMSUpschulte, Schelling, et al., 1984gas phase; From thermochemical cycle; M

Free energy of reaction

ΔrG° (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+) • Sulfur dioxide)

By formula: Na+ + O2S = (Na+ • O2S)

Quantity Value Units Method Reference Comment
Δr79.1kJ/molFAPerry, Rowe, et al., 1980gas phase; Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
Δr84.9J/mol*KN/APerry, Rowe, et al., 1980gas phase; Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
Δr53.6kJ/molFAPerry, Rowe, et al., 1980gas phase; Entropy change calculated or estimated; M

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

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

Bond type: Hydrogen bond (negative ion to hydride)

Quantity Value Units Method Reference Comment
Δr93.7kJ/molPHPMSCaldwell and Kebarle, 1985gas phase; From thermochemical cycle,switching reaction(Br-)SO2; M
Quantity Value Units Method Reference Comment
Δr77.8J/mol*KPHPMSCaldwell and Kebarle, 1985gas phase; From thermochemical cycle,switching reaction(Br-)SO2; M

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

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

Quantity Value Units Method Reference Comment
Δr59.0kJ/molHPMSUpschulte, Schelling, et al., 1984gas phase; From thermochemical cycle; M
Quantity Value Units Method Reference Comment
Δr81.2J/mol*KHPMSUpschulte, Schelling, et al., 1984gas phase; From thermochemical cycle; M

Free energy of reaction

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

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

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

Quantity Value Units Method Reference Comment
Δr33.9 ± 1.3kJ/molTDAsVacher, Jorda, et al., 1992gas phase; B
Δr35.kJ/molHPMSKeesee, Lee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
Δr66.9J/mol*KHPMSKeesee, Lee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
Δr16.3 ± 0.84kJ/molTDAsVacher, Jorda, et al., 1992gas phase; B

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

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

Bond type: Hydrogen bond (negative ion to hydride)

Quantity Value Units Method Reference Comment
Δr38.9kJ/molTDAsUpschulte, Schelling, et al., 1984gas phase; B,M
Quantity Value Units Method Reference Comment
Δr82.4J/mol*KHPMSUpschulte, Schelling, et al., 1984gas phase; M
Quantity Value Units Method Reference Comment
Δr14.2kJ/molTDAsUpschulte, Schelling, et al., 1984gas phase; B

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

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

Bond type: Hydrogen bond (negative ion to hydride)

Quantity Value Units Method Reference Comment
Δr41.4kJ/molTDAsUpschulte, Schelling, et al., 1984gas phase; B,M
Quantity Value Units Method Reference Comment
Δr95.0J/mol*KHPMSUpschulte, Schelling, et al., 1984gas phase; M
Quantity Value Units Method Reference Comment
Δr13.0kJ/molTDAsUpschulte, Schelling, et al., 1984gas phase; B

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

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

Quantity Value Units Method Reference Comment
Δr27.6 ± 0.84kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B,M
Quantity Value Units Method Reference Comment
Δr56.1J/mol*KHPMSKeesee, Lee, et al., 1980gas phase; Entropy change is questionable; M
Quantity Value Units Method Reference Comment
Δr10.9 ± 3.3kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B

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

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

Bond type: Hydrogen bond (negative ion to hydride)

Quantity Value Units Method Reference Comment
Δr58.2kJ/molPHPMSCaldwell and Kebarle, 1985gas phase; From thermochemical cycle; M
Quantity Value Units Method Reference Comment
Δr80.3J/mol*KPHPMSCaldwell and Kebarle, 1985gas phase; From thermochemical cycle; M

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

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

Quantity Value Units Method Reference Comment
Δr72.8kJ/molHPMSUpschulte, Schelling, et al., 1984gas phase; M
Quantity Value Units Method Reference Comment
Δr84.5J/mol*KHPMSUpschulte, Schelling, et al., 1984gas phase; M

Free energy of reaction

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

HO2S+ + Sulfur dioxide = (HO2S+ • Sulfur dioxide)

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

Quantity Value Units Method Reference Comment
Δr89.1kJ/molPHPMSSzulejko and McMahon, 1992gas phase; M
Δr97.1kJ/molPHPMSMcMahon and Kebarle, 1986gas phase; M
Quantity Value Units Method Reference Comment
Δr108.J/mol*KPHPMSSzulejko and McMahon, 1992gas phase; M
Δr115.J/mol*KPHPMSMcMahon and Kebarle, 1986gas phase; M

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

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

Quantity Value Units Method Reference Comment
Δr41.84 ± 0.42kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B,M
Quantity Value Units Method Reference Comment
Δr96.7J/mol*KHPMSKeesee, Lee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
Δr13.0 ± 1.3kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B

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

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

Quantity Value Units Method Reference Comment
Δr38.5 ± 0.84kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B,M
Quantity Value Units Method Reference Comment
Δr103.J/mol*KHPMSKeesee, Lee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
Δr7.5 ± 2.5kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B

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

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

Quantity Value Units Method Reference Comment
Δr42.26 ± 0.42kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B,M
Quantity Value Units Method Reference Comment
Δr90.4J/mol*KHPMSKeesee, Lee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
Δr15.1 ± 1.3kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B

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

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

Quantity Value Units Method Reference Comment
Δr36.0 ± 0.84kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B,M
Quantity Value Units Method Reference Comment
Δr97.1J/mol*KHPMSKeesee, Lee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
Δr6.7 ± 4.2kJ/molTDAsKeesee, Lee, et al., 1980gas phase; B

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

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

Bond type: Hydrogen bond (negative ion to hydride)

Quantity Value Units Method Reference Comment
Δr14.6 ± 0.42kJ/molTDAsBanic and Iribarne, 1985gas phase; B

Free energy of reaction

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

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

By formula: HO- + O2S = (HO- • O2S)

Quantity Value Units Method Reference Comment
Δr259. ± 12.kJ/molCIDTSquires, 1992gas phase; Dissociative protonation between HCl, MeCHClCO2H; B
Δr>213. ± 13.kJ/molIMRBHierl and Paulson, 1984gas phase; CO2..HO- + SO2 ->. data revised per 92SQU; B

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

By formula: Br- + O2S = (Br- • O2S)

Quantity Value Units Method Reference Comment
Δr80.8 ± 8.4kJ/molTDAsCaldwell and Kebarle, 1985gas phase; B,M
Quantity Value Units Method Reference Comment
Δr92.0J/mol*KPHPMSCaldwell and Kebarle, 1985gas phase; M
Quantity Value Units Method Reference Comment
Δr53. ± 11.kJ/molTDAsCaldwell and Kebarle, 1985gas phase; B

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

By formula: CN- + O2S = (CN- • O2S)

Quantity Value Units Method Reference Comment
Δr90.8 ± 3.3kJ/molTDAsLarson, Szulejko, et al., 1988gas phase; B,M
Quantity Value Units Method Reference Comment
Δr120.J/mol*KPHPMSLarson, Szulejko, et al., 1988gas phase; M
Quantity Value Units Method Reference Comment
Δr56.07 ± 0.84kJ/molTDAsLarson, Szulejko, et al., 1988gas phase; B

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

By formula: Cs+ + O2S = (Cs+ • O2S)

Quantity Value Units Method Reference Comment
Δr45.2kJ/molDTMcKnight and Sawina, 1972gas phase; M
Quantity Value Units Method Reference Comment
Δr79.1J/mol*KDTMcKnight and Sawina, 1972gas phase; M

Free energy of reaction

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

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

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

Quantity Value Units Method Reference Comment
Δr31.kJ/molHPMSWlodek, Luczynski, et al., 1983gas phase; Entropy change is questionable; M
Quantity Value Units Method Reference Comment
Δr43.5J/mol*KHPMSWlodek, Luczynski, et al., 1983gas phase; Entropy change is questionable; M

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

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

Bond type: Hydrogen bond (positive ion to hydride)

Quantity Value Units Method Reference Comment
Δr22.kJ/molHPMSBanic and Iribarne, 1985gas phase; From thermochemical cycle,switching reaction, electric fields; M

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

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

Quantity Value Units Method Reference Comment
Δr37.kJ/molHPMSWlodek, Luczynski, et al., 1983gas phase; Entropy change is questionable; M
Quantity Value Units Method Reference Comment
Δr59.0J/mol*KHPMSWlodek, Luczynski, et al., 1983gas phase; Entropy change is questionable; M

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

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

Bond type: Hydrogen bond (positive ion to hydride)

Quantity Value Units Method Reference Comment
Δr31.kJ/molHPMSBanic and Iribarne, 1985gas phase; From thermochemical cycle,switching reaction, electric fields; M

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

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

Quantity Value Units Method Reference Comment
Δr27.6 ± 1.3kJ/molTDAsVacher, Leduc, et al., 1994gas phase; B
Quantity Value Units Method Reference Comment
Δr12.6 ± 0.84kJ/molTDAsVacher, Leduc, et al., 1994gas phase; B

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

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

Quantity Value Units Method Reference Comment
Δr29.7 ± 2.9kJ/molTDAsVacher, Leduc, et al., 1994gas phase; B
Quantity Value Units Method Reference Comment
Δr10.9 ± 0.84kJ/molTDAsVacher, Leduc, et al., 1994gas phase; B

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

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

Quantity Value Units Method Reference Comment
Δr15.9 ± 3.8kJ/molTDAsVacher, Leduc, et al., 1994gas phase; B
Quantity Value Units Method Reference Comment
Δr4.60 ± 0.84kJ/molTDAsVacher, Leduc, et al., 1994gas phase; B

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

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

Quantity Value Units Method Reference Comment
Δr15.5 ± 2.9kJ/molTDAsVacher, Leduc, et al., 1994gas phase; B
Quantity Value Units Method Reference Comment
Δr2.5 ± 0.84kJ/molTDAsVacher, Leduc, et al., 1994gas phase; B

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

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

Quantity Value Units Method Reference Comment
Δr29.7 ± 1.7kJ/molTDAsVacher, Leduc, et al., 1994gas phase; B
Quantity Value Units Method Reference Comment
Δr15.9 ± 0.84kJ/molTDAsVacher, Leduc, et al., 1994gas phase; B

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

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

Quantity Value Units Method Reference Comment
Δr29.7 ± 2.9kJ/molTDAsVacher, Leduc, et al., 1994gas phase; B
Quantity Value Units Method Reference Comment
Δr12.6 ± 0.84kJ/molTDAsVacher, Leduc, et al., 1994gas phase; B

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

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

Free energy of reaction

ΔrG° (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- • 6Sulfur dioxide • Water) + Sulfur dioxide = (O2S- • 7Sulfur dioxide • Water)

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

Quantity Value Units Method Reference Comment
Δr13.4 ± 2.5kJ/molTDAsVacher, Leduc, et al., 1994gas phase; B
Quantity Value Units Method Reference Comment
Δr2.9 ± 0.84kJ/molTDAsVacher, Leduc, et al., 1994gas phase; B

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

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

Quantity Value Units Method Reference Comment
Δr18.0 ± 0.42kJ/molTDAsBanic and Iribarne, 1985gas phase; B

Free energy of reaction

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

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

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

Quantity Value Units Method Reference Comment
Δr37.7 ± 0.42kJ/molTDAsBanic and Iribarne, 1985gas phase; B

Free energy of reaction

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

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

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

Quantity Value Units Method Reference Comment
Δr15.1 ± 1.7kJ/molTDAsVacher, Jorda, et al., 1992gas phase; B
Quantity Value Units Method Reference Comment
Δr6. ± 13.kJ/molTDAsVacher, Jorda, et al., 1992gas phase; B

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

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

Quantity Value Units Method Reference Comment
Δr19.2 ± 1.7kJ/molTDAsVacher, Jorda, et al., 1992gas phase; B
Quantity Value Units Method Reference Comment
Δr10. ± 8.4kJ/molTDAsVacher, Jorda, et al., 1992gas phase; B

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

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

Quantity Value Units Method Reference Comment
Δr23.8 ± 2.5kJ/molTDAsVacher, Jorda, et al., 1992gas phase; B
Quantity Value Units Method Reference Comment
Δr15. ± 8.8kJ/molTDAsVacher, Jorda, et al., 1992gas phase; B

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

By formula: CH3+ + O2S = (CH3+ • O2S)

Quantity Value Units Method Reference Comment
Δr254.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

References

Go To: Top, Reaction thermochemistry data, Notes

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

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

French, Ikuta, et al., 1982
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]

Keesee and Castleman, 1980
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Lobring, Check, et al., 2003
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Squires, 1992
Squires, R.R., Gas Phase Thermochemical Properties of the Bicarbonate and Bisulfate Ions, Int. J. Mass Spectrom. Ion Proc., 1992, 117, 565, https://doi.org/10.1016/0168-1176(92)80114-G . [all data]

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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]

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Wlodek, Luczynski, et al., 1983
Wlodek, S.; Luczynski, Z.; Wincel, H., Gas phase complexes of NO2- and NO3- with SO2, Int. J. Mass Spectrom. Ion Processes, 1983, 49, 301. [all data]

Lee, Keesee, et al., 1980
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Szulejko, J.; McMahon, T.B., personal communication, 1992. [all data]

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Notes

Go To: Top, Reaction thermochemistry data, References