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
ΔrH°22.2 ± 2.0kcal/molTDAsCaldwell and Kebarle, 1985gas phase; B,M
ΔrH°20.9 ± 2.0kcal/molIMRELarson and McMahon, 1985gas phase; B
ΔrH°22.2 ± 2.2kcal/molTDEqBohringer, Fahey, et al., 1984gas phase; Relative to HOH..Cl- in Keesee, Lee, et al., 1980; B,M
ΔrH°21.80 ± 0.20kcal/molTDAsKeesee, Lee, et al., 1980gas phase; B,M
ΔrH°20.9kcal/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
ΔrS°21.6cal/mol*KPHPMSCaldwell and Kebarle, 1985gas phase; M
ΔrS°24.1cal/mol*KN/ABohringer, Fahey, et al., 1984gas phase; switching reaction(Cl-)H2O), Entropy change calculated or estimated; Keesee and Castleman, 1980; M
ΔrS°20.8cal/mol*KN/ALarson and McMahon, 1984gas phase; switching reaction(Cl-)t-C4H9OH, Entropy change calculated or estimated; French, Ikuta, et al., 1982; M
ΔrS°23.2cal/mol*KHPMSKeesee, Lee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
ΔrG°15.7 ± 2.0kcal/molTDAsCaldwell and Kebarle, 1985gas phase; B
ΔrG°14.7 ± 2.0kcal/molIMRELarson and McMahon, 1985gas phase; B
ΔrG°15.0 ± 1.6kcal/molTDEqBohringer, Fahey, et al., 1984gas phase; Relative to HOH..Cl- in Keesee, Lee, et al., 1980; B,M
ΔrG°14.80 ± 0.30kcal/molTDAsKeesee, Lee, et al., 1980gas phase; B
ΔrG°14.7kcal/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° (kcal/mol) T (K) Method Reference Comment
14.2296.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
ΔrH°53.8 ± 2.2kcal/molCIDTLobring, Check, et al., 2003gas phase; B
ΔrH°53.0 ± 2.5kcal/molCIDTSquires, 1992gas phase; B
ΔrH°43.8kcal/molICRLarson and McMahon, 1985gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
ΔrH°43.8 ± 2.0kcal/molIMRELarson and McMahon, 1983gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M
ΔrH°59.kcal/molSAMSRobbiani and Franklin, 1979gas phase; Cl- + CO2ClF --> SO2F- + Cl2, ΔrH>; M
Quantity Value Units Method Reference Comment
ΔrS°24.cal/mol*KN/ALarson and McMahon, 1985gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
ΔrS°23.0cal/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
ΔrG°36.6kcal/molICRLarson and McMahon, 1985gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
ΔrG°36.9 ± 2.0kcal/molIMRELarson and McMahon, 1983gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M

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

By formula: NO3- + O2S = (NO3- • O2S)

Quantity Value Units Method Reference Comment
ΔrH°17.2 ± 2.0kcal/molTDEqBohringer, Fahey, et al., 1984gas phase; Relative to HOH..NO3-, Keesee, Lee, et al., 1980; B,M
ΔrH°18.2 ± 1.2kcal/molTDAsWlodek, Luczynski, et al., 1983gas phase; B,M
Quantity Value Units Method Reference Comment
ΔrS°25.2cal/mol*KN/ABohringer, Fahey, et al., 1984gas phase; switching reaction(NO3-)H2O, Entropy change calculated or estimated; Lee, Keesee, et al., 1980; M
ΔrS°31.6cal/mol*KHPMSWlodek, Luczynski, et al., 1983gas phase; M
Quantity Value Units Method Reference Comment
ΔrG°9.6 ± 2.0kcal/molTDEqBohringer, Fahey, et al., 1984gas phase; Relative to HOH..NO3-, Keesee, Lee, et al., 1980; B,M
ΔrG°10.00 ± 0.10kcal/molTDAsBanic and Iribarne, 1985gas phase; B
ΔrG°8.80 ± 0.90kcal/molTDAsWlodek, Luczynski, et al., 1983gas phase; B
ΔrG°10.6kcal/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° (kcal/mol) T (K) Method Reference Comment
10.0299.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
ΔrH°14.3 ± 2.0kcal/molTDAsCaldwell and Kebarle, 1985gas phase; B,M
ΔrH°12.90 ± 0.10kcal/molTDAsKeesee, Lee, et al., 1980gas phase; B,M
Quantity Value Units Method Reference Comment
ΔrS°17.6cal/mol*KPHPMSCaldwell and Kebarle, 1985gas phase; M
ΔrS°20.2cal/mol*KHPMSKeesee, Lee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
ΔrG°9.0 ± 2.6kcal/molTDAsCaldwell and Kebarle, 1985gas phase; B
ΔrG°1.70 ± 0.10kcal/molTDAsBanic and Iribarne, 1985gas phase; B
ΔrG°6.80 ± 0.20kcal/molTDAsKeesee, Lee, et al., 1980gas phase; B

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
9.0301.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
ΔrH°24.00 ± 0.20kcal/molTDAsKeesee, Lee, et al., 1980gas phase; B,M
ΔrH°21.3 ± 1.3kcal/molTDAsVacher, Leduc, et al., 1994gas phase; B
ΔrH°18.50kcal/molN/ADresch, Kramer, et al., 1991gas phase; Both dissociation and electron detachment?; B
ΔrH°18.30kcal/molN/ASnodgrass, Coe, et al., 1988gas phase; Appears to be dissociation + electron detachment; B
Quantity Value Units Method Reference Comment
ΔrS°33.8cal/mol*KHPMSKeesee, Lee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
ΔrG°13.90 ± 0.40kcal/molTDAsKeesee, Lee, et al., 1980gas phase; B
ΔrG°10.4 ± 2.2kcal/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
ΔrH°25.90 ± 0.20kcal/molTDAsKeesee, Lee, et al., 1980gas phase; B,M
ΔrH°24.3 ± 1.0kcal/molTDEqBohringer, Fahey, et al., 1984gas phase; Relative to HOH..NO2-, Keesee, Lee, et al., 1980; B,M
Quantity Value Units Method Reference Comment
ΔrS°36.8cal/mol*KHPMSKeesee, Lee, et al., 1980gas phase; M
ΔrS°31.6cal/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
ΔrG°14.90 ± 0.30kcal/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
ΔrH°14.kcal/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
ΔrS°20.cal/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° (kcal/mol) T (K) Method Reference Comment
8.0296.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
ΔrH°10.40kcal/molTDAsUpschulte, Schelling, et al., 1984gas phase; B,M
Quantity Value Units Method Reference Comment
ΔrS°19.4cal/mol*KHPMSUpschulte, Schelling, et al., 1984gas phase; M
Quantity Value Units Method Reference Comment
ΔrG°4.60kcal/molTDAsUpschulte, Schelling, et al., 1984gas phase; B

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
5.5296.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
ΔrH°12.3 ± 1.0kcal/molTDAsKeesee, Lee, et al., 1980gas phase; B,M
ΔrH°12.3kcal/molPHPMSCaldwell and Kebarle, 1985gas phase; M
Quantity Value Units Method Reference Comment
ΔrS°20.2cal/mol*KPHPMSCaldwell and Kebarle, 1985gas phase; M
ΔrS°22.7cal/mol*KHPMSKeesee, Lee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
ΔrG°5.5 ± 2.2kcal/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
ΔrH°9.00 ± 0.20kcal/molTDAsKeesee, Lee, et al., 1980gas phase; B,M
ΔrH°9.8kcal/molHPMSWlodek, Luczynski, et al., 1983gas phase; M
Quantity Value Units Method Reference Comment
ΔrS°21.5cal/mol*KHPMSWlodek, Luczynski, et al., 1983gas phase; M
ΔrS°16.8cal/mol*KHPMSKeesee, Lee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
ΔrG°4.00 ± 0.40kcal/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
ΔrH°12.3kcal/molHPMSCastleman, Peterson, et al., 1983gas phase; Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
ΔrS°27.cal/mol*KN/ACastleman, Peterson, et al., 1983gas phase; Entropy change calculated or estimated; M

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
3.2328.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
ΔrH°12.2kcal/molPHPMSCaldwell and Kebarle, 1985gas phase; From thermochemical cycle,switching reaction(Br- HBr)SO2; M
Quantity Value Units Method Reference Comment
ΔrS°19.2cal/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
ΔrH°11.8kcal/molHPMSUpschulte, Schelling, et al., 1984gas phase; From thermochemical cycle; M
Quantity Value Units Method Reference Comment
ΔrS°26.0cal/mol*KHPMSUpschulte, Schelling, et al., 1984gas phase; From thermochemical cycle; M

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
4.1296.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
ΔrH°18.9kcal/molFAPerry, Rowe, et al., 1980gas phase; Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
ΔrS°20.3cal/mol*KN/APerry, Rowe, et al., 1980gas phase; Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
ΔrG°12.8kcal/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
ΔrH°22.4kcal/molPHPMSCaldwell and Kebarle, 1985gas phase; From thermochemical cycle,switching reaction(Br-)SO2; M
Quantity Value Units Method Reference Comment
ΔrS°18.6cal/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
ΔrH°14.1kcal/molHPMSUpschulte, Schelling, et al., 1984gas phase; From thermochemical cycle; M
Quantity Value Units Method Reference Comment
ΔrS°19.4cal/mol*KHPMSUpschulte, Schelling, et al., 1984gas phase; From thermochemical cycle; M

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
8.4296.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
ΔrH°8.10 ± 0.30kcal/molTDAsVacher, Jorda, et al., 1992gas phase; B
ΔrH°8.3kcal/molHPMSKeesee, Lee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
ΔrS°16.0cal/mol*KHPMSKeesee, Lee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
ΔrG°3.90 ± 0.20kcal/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
ΔrH°9.30kcal/molTDAsUpschulte, Schelling, et al., 1984gas phase; B,M
Quantity Value Units Method Reference Comment
ΔrS°19.7cal/mol*KHPMSUpschulte, Schelling, et al., 1984gas phase; M
Quantity Value Units Method Reference Comment
ΔrG°3.40kcal/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
ΔrH°9.90kcal/molTDAsUpschulte, Schelling, et al., 1984gas phase; B,M
Quantity Value Units Method Reference Comment
ΔrS°22.7cal/mol*KHPMSUpschulte, Schelling, et al., 1984gas phase; M
Quantity Value Units Method Reference Comment
ΔrG°3.10kcal/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
ΔrH°6.60 ± 0.20kcal/molTDAsKeesee, Lee, et al., 1980gas phase; B,M
Quantity Value Units Method Reference Comment
ΔrS°13.4cal/mol*KHPMSKeesee, Lee, et al., 1980gas phase; Entropy change is questionable; M
Quantity Value Units Method Reference Comment
ΔrG°2.60 ± 0.80kcal/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
ΔrH°13.9kcal/molPHPMSCaldwell and Kebarle, 1985gas phase; From thermochemical cycle; M
Quantity Value Units Method Reference Comment
ΔrS°19.2cal/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
ΔrH°17.4kcal/molHPMSUpschulte, Schelling, et al., 1984gas phase; M
Quantity Value Units Method Reference Comment
ΔrS°20.2cal/mol*KHPMSUpschulte, Schelling, et al., 1984gas phase; M

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
11.5296.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
ΔrH°21.3kcal/molPHPMSSzulejko and McMahon, 1992gas phase; M
ΔrH°23.2kcal/molPHPMSMcMahon and Kebarle, 1986gas phase; M
Quantity Value Units Method Reference Comment
ΔrS°25.7cal/mol*KPHPMSSzulejko and McMahon, 1992gas phase; M
ΔrS°27.4cal/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
ΔrH°10.00 ± 0.10kcal/molTDAsKeesee, Lee, et al., 1980gas phase; B,M
Quantity Value Units Method Reference Comment
ΔrS°23.1cal/mol*KHPMSKeesee, Lee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
ΔrG°3.10 ± 0.30kcal/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
ΔrH°9.20 ± 0.20kcal/molTDAsKeesee, Lee, et al., 1980gas phase; B,M
Quantity Value Units Method Reference Comment
ΔrS°24.7cal/mol*KHPMSKeesee, Lee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
ΔrG°1.80 ± 0.60kcal/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
ΔrH°10.10 ± 0.10kcal/molTDAsKeesee, Lee, et al., 1980gas phase; B,M
Quantity Value Units Method Reference Comment
ΔrS°21.6cal/mol*KHPMSKeesee, Lee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
ΔrG°3.60 ± 0.30kcal/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
ΔrH°8.60 ± 0.20kcal/molTDAsKeesee, Lee, et al., 1980gas phase; B,M
Quantity Value Units Method Reference Comment
ΔrS°23.2cal/mol*KHPMSKeesee, Lee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
ΔrG°1.6 ± 1.0kcal/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
ΔrG°3.50 ± 0.10kcal/molTDAsBanic and Iribarne, 1985gas phase; B

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
3.5300.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
ΔrH°61.9 ± 2.8kcal/molCIDTSquires, 1992gas phase; Dissociative protonation between HCl, MeCHClCO2H; B
ΔrH°>50.9 ± 3.0kcal/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
ΔrH°19.3 ± 2.0kcal/molTDAsCaldwell and Kebarle, 1985gas phase; B,M
Quantity Value Units Method Reference Comment
ΔrS°22.0cal/mol*KPHPMSCaldwell and Kebarle, 1985gas phase; M
Quantity Value Units Method Reference Comment
ΔrG°12.7 ± 2.6kcal/molTDAsCaldwell and Kebarle, 1985gas phase; B

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

By formula: CN- + O2S = (CN- • O2S)

Quantity Value Units Method Reference Comment
ΔrH°21.70 ± 0.80kcal/molTDAsLarson, Szulejko, et al., 1988gas phase; B,M
Quantity Value Units Method Reference Comment
ΔrS°28.cal/mol*KPHPMSLarson, Szulejko, et al., 1988gas phase; M
Quantity Value Units Method Reference Comment
ΔrG°13.40 ± 0.20kcal/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
ΔrH°10.8kcal/molDTMcKnight and Sawina, 1972gas phase; M
Quantity Value Units Method Reference Comment
ΔrS°18.9cal/mol*KDTMcKnight and Sawina, 1972gas phase; M

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
5.2300.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
ΔrH°7.4kcal/molHPMSWlodek, Luczynski, et al., 1983gas phase; Entropy change is questionable; M
Quantity Value Units Method Reference Comment
ΔrS°10.4cal/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
ΔrG°5.2kcal/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
ΔrH°8.8kcal/molHPMSWlodek, Luczynski, et al., 1983gas phase; Entropy change is questionable; M
Quantity Value Units Method Reference Comment
ΔrS°14.1cal/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
ΔrG°7.4kcal/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
ΔrH°6.60 ± 0.30kcal/molTDAsVacher, Leduc, et al., 1994gas phase; B
Quantity Value Units Method Reference Comment
ΔrG°3.00 ± 0.20kcal/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
ΔrH°7.10 ± 0.70kcal/molTDAsVacher, Leduc, et al., 1994gas phase; B
Quantity Value Units Method Reference Comment
ΔrG°2.60 ± 0.20kcal/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
ΔrH°3.80 ± 0.90kcal/molTDAsVacher, Leduc, et al., 1994gas phase; B
Quantity Value Units Method Reference Comment
ΔrG°1.10 ± 0.20kcal/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
ΔrH°3.70 ± 0.70kcal/molTDAsVacher, Leduc, et al., 1994gas phase; B
Quantity Value Units Method Reference Comment
ΔrG°0.60 ± 0.20kcal/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
ΔrH°7.10 ± 0.40kcal/molTDAsVacher, Leduc, et al., 1994gas phase; B
Quantity Value Units Method Reference Comment
ΔrG°3.80 ± 0.20kcal/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
ΔrH°7.10 ± 0.70kcal/molTDAsVacher, Leduc, et al., 1994gas phase; B
Quantity Value Units Method Reference Comment
ΔrG°3.00 ± 0.20kcal/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° (kcal/mol) T (K) Method Reference Comment
2.6300.HPMSBanic and Iribarne, 1985gas phase; electric fields; M
2.6300.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
ΔrH°3.20 ± 0.60kcal/molTDAsVacher, Leduc, et al., 1994gas phase; B
Quantity Value Units Method Reference Comment
ΔrG°0.70 ± 0.20kcal/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
ΔrG°4.30 ± 0.10kcal/molTDAsBanic and Iribarne, 1985gas phase; B

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
4.3299.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
ΔrG°9.00 ± 0.10kcal/molTDAsBanic and Iribarne, 1985gas phase; B

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
7.1300.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
ΔrH°3.60 ± 0.40kcal/molTDAsVacher, Jorda, et al., 1992gas phase; B
Quantity Value Units Method Reference Comment
ΔrG°1.5 ± 3.0kcal/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
ΔrH°4.60 ± 0.40kcal/molTDAsVacher, Jorda, et al., 1992gas phase; B
Quantity Value Units Method Reference Comment
ΔrG°2.5 ± 2.0kcal/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
ΔrH°5.70 ± 0.60kcal/molTDAsVacher, Jorda, et al., 1992gas phase; B
Quantity Value Units Method Reference Comment
ΔrG°3.6 ± 2.1kcal/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
ΔrH°60.6kcal/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 48.3 kcal/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.

Caldwell and Kebarle, 1985
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Larson and McMahon, 1985
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Bohringer, Fahey, et al., 1984
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Keesee, Lee, et al., 1980
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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
Keesee, R.G.; Castleman, A.W., Jr., Gas phase studies of hydration complexes of Cl- and I- and comparison to electrostatic calculations in the gas phase, Chem. Phys. Lett., 1980, 74, 139. [all data]

Fehsenfeld and Ferguson, 1974
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Lobring, Check, et al., 2003
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]

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]

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

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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]

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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Robbiani, R.; Franklin, J.L., Negative ion-molecule reaction in sulfuryl halides, J. Am. Chem. Soc., 1979, 101, 3709. [all data]

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
Lee, N.; Keesee, R.G.; Castleman, A.W., Jr., The properties of clusters in the gas phase. IV. Complexes of H2O and HNOx clustering on NOx-, J. Chem. Phys., 1980, 72, 1089. [all data]

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]

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Dresch, T.; Kramer, H.; Thurner, Y.; Weber, R., Photoelectrons from Negative Dimers and Clusters of Sulfur Dioxide, Chem. Phys. Lett., 1991, 177, 4-5, 383, https://doi.org/10.1016/0009-2614(91)85070-D . [all data]

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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]

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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]

Perry, Rowe, et al., 1980
Perry, R.A.; Rowe, B.R.; Viggiano, A.A.; Albritton, D.L.; Ferguson, E.E.; Fehsenfeld, F.C., Laboratory Measurements of Stratospheric Sodium Ion Measurements, Geophys. Res. Lett., 1980, 7, 9, 693, https://doi.org/10.1029/GL007i009p00693 . [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]

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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]

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McKnight and Sawina, 1972
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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Notes

Go To: Top, Reaction thermochemistry data, References