CN anion


Reaction thermochemistry data

Go To: Top, Gas phase ion energetics data, References, Notes

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

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

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Reactions 1 to 50

CN- + Water = (CN- • Water)

By formula: CN- + H2O = (CN- • H2O)

Quantity Value Units Method Reference Comment
Δr12.70 ± 0.80kcal/molTDAsLarson, Szulejko, et al., 1988gas phase; B,M
Δr14.6 ± 1.0kcal/molTDAsMeot-ner, 1988gas phase; B,B,M,M
Δr13.80kcal/molTDAsPayzant, Yamdagni, et al., 1971gas phase; B,M
Δr14.6kcal/molPHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n; M
Quantity Value Units Method Reference Comment
Δr19.6cal/mol*KPHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n; M
Δr18.cal/mol*KPHPMSLarson, Szulejko, et al., 1988gas phase; M
Δr19.6cal/mol*KPHPMSMeot-ner, 1988, 2gas phase; M
Δr19.6cal/mol*KPHPMSMeot-ner, 1988gas phase; M
Δr19.8cal/mol*KHPMSPayzant, Yamdagni, et al., 1971gas phase; M
Quantity Value Units Method Reference Comment
Δr7.30 ± 0.20kcal/molTDAsLarson, Szulejko, et al., 1988gas phase; B
Δr8.7 ± 1.0kcal/molTDAsMeot-ner, 1988, 2gas phase; B
Δr8.7 ± 1.0kcal/molTDAsMeot-ner, 1988gas phase; B
Δr7.90kcal/molTDAsPayzant, Yamdagni, et al., 1971gas phase; B

CN- + Hydrogen cyanide = (CN- • Hydrogen cyanide)

By formula: CN- + CHN = (CN- • CHN)

Quantity Value Units Method Reference Comment
Δr21.7 ± 3.5kcal/molIMRELarson and McMahon, 1987gas phase; B,M
Δr20.0 ± 2.0kcal/molEstLarson and McMahon, 1984gas phase; B
Δr20.7kcal/molPHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n; M
Δr20.7kcal/molPHPMSMeot-ner, 1988, 2gas phase; M,B,B,M
Quantity Value Units Method Reference Comment
Δr20.6cal/mol*KPHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n; M
Δr20.6cal/mol*KPHPMSMeot-ner, Cybulski, et al., 1988gas phase; M
Δr20.6cal/mol*KPHPMSMeot-ner, 1988, 2gas phase; M
Δr26.9cal/mol*KN/ALarson and McMahon, 1987gas phase; switching reaction,Thermochemical ladder(H2O), Entropy change calculated or estimated; Payzant, Yamdagni, et al., 1971; M
Quantity Value Units Method Reference Comment
Δr14.5 ± 1.0kcal/molTDAsMeot-ner, 1988, 2gas phase; B
Δr13.7 ± 2.3kcal/molIMRELarson and McMahon, 1987gas phase; B,M
Δr14.5 ± 1.6kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B

CN- + Acetonitrile = (CN- • Acetonitrile)

By formula: CN- + C2H3N = (CN- • C2H3N)

Quantity Value Units Method Reference Comment
Δr13.8 ± 1.0kcal/molTDAsMeot-ner, 1988, 2gas phase; B,M
Δr16.4 ± 3.5kcal/molIMRELarson and McMahon, 1987gas phase; B,M
Δr15.70kcal/molTDAsHiraoka, Mizure, et al., 1988gas phase; B,M
Quantity Value Units Method Reference Comment
Δr21.7cal/mol*KPHPMSHiraoka, Mizure, et al., 1988gas phase; M
Δr14.2cal/mol*KPHPMSMeot-ner, 1988, 2gas phase; M
Δr24.3cal/mol*KN/ALarson and McMahon, 1987gas phase; switching reaction,Thermochemical ladder(CN-)H2O, Entropy change calculated or estimated; Payzant, Yamdagni, et al., 1971; M
Quantity Value Units Method Reference Comment
Δr9.5 ± 1.0kcal/molTDAsMeot-ner, 1988, 2gas phase; B
Δr9.1 ± 2.3kcal/molIMRELarson and McMahon, 1987gas phase; B,M
Δr9.20kcal/molTDAsHiraoka, Mizure, et al., 1988gas phase; B

CN- + Methyl Alcohol = (CN- • Methyl Alcohol)

By formula: CN- + CH4O = (CN- • CH4O)

Quantity Value Units Method Reference Comment
Δr15.70 ± 0.80kcal/molTDAsLarson, Szulejko, et al., 1988gas phase; B,M
Δr16.6 ± 1.0kcal/molTDAsMeot-ner, 1988, 2gas phase; B
Δr16.5 ± 3.5kcal/molIMRELarson and McMahon, 1987gas phase; B,M
Quantity Value Units Method Reference Comment
Δr23.cal/mol*KPHPMSLarson, Szulejko, et al., 1988gas phase; M
Δr24.3cal/mol*KN/ALarson and McMahon, 1987gas phase; switching reaction,Thermochemical ladder(CN-)H2O, Entropy change calculated or estimated; Payzant, Yamdagni, et al., 1971; M
Quantity Value Units Method Reference Comment
Δr8.80 ± 0.20kcal/molTDAsLarson, Szulejko, et al., 1988gas phase; B
Δr10.4 ± 1.0kcal/molTDAsMeot-ner, 1988, 2gas phase; B
Δr9.2 ± 2.3kcal/molIMRELarson and McMahon, 1987gas phase; B,M

CN- + Hydrogen cation = Hydrogen cyanide

By formula: CN- + H+ = CHN

Quantity Value Units Method Reference Comment
Δr349.8 ± 1.0kcal/molCIDTAkin and Ervin, 2006gas phase; B
Δr350.50 ± 0.17kcal/molD-EABradforth, Kim, et al., 1993gas phase; B
Δr351.1 ± 2.1kcal/molG+TSBartmess, Scott, et al., 1979gas phase; value altered from reference due to change in acidity scale; B
Quantity Value Units Method Reference Comment
Δr342.5 ± 1.1kcal/molH-TSAkin and Ervin, 2006gas phase; B
Δr343.17 ± 0.27kcal/molH-TSBradforth, Kim, et al., 1993gas phase; B
Δr343.8 ± 2.0kcal/molIMREBartmess, Scott, et al., 1979gas phase; value altered from reference due to change in acidity scale; B

(CN- • 2Water) + Water = (CN- • 3Water)

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

Quantity Value Units Method Reference Comment
Δr10.7 ± 1.0kcal/molTDAsMeot-Ner (Mautner) M. and Speller, 1989gas phase; Stated EA is Vertical Detachment Energy, at 12 K. At 298 K, measured Vertical Detachment Energy = 5.50±0.10 eV; B,M
Δr10.7kcal/molPHPMSMeot-ner, 1988, 2gas phase; M
Quantity Value Units Method Reference Comment
Δr19.8cal/mol*KPHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n; M
Δr19.8cal/mol*KPHPMSMeot-ner, 1988, 2gas phase; M
Quantity Value Units Method Reference Comment
Δr7.8 ± 1.4kcal/molTDAsMeot-Ner (Mautner) M. and Speller, 1989gas phase; Stated EA is Vertical Detachment Energy, at 12 K. At 298 K, measured Vertical Detachment Energy = 5.50±0.10 eV; B

CN- + Isopropyl Alcohol = (CN- • Isopropyl Alcohol)

By formula: CN- + C3H8O = (CN- • C3H8O)

Quantity Value Units Method Reference Comment
Δr16.70 ± 0.80kcal/molTDAsLarson, Szulejko, et al., 1988gas phase; B,M
Δr18.1 ± 3.5kcal/molIMRELarson and McMahon, 1987gas phase; B,M
Quantity Value Units Method Reference Comment
Δr26.cal/mol*KPHPMSLarson, Szulejko, et al., 1988gas phase; M
Δr24.8cal/mol*KN/ALarson and McMahon, 1987gas phase; switching reaction,Thermochemical ladder(CN-)H2O, Entropy change calculated or estimated; Payzant, Yamdagni, et al., 1971; M
Quantity Value Units Method Reference Comment
Δr9.00 ± 0.20kcal/molTDAsLarson, Szulejko, et al., 1988gas phase; B
Δr10.7 ± 2.3kcal/molIMRELarson and McMahon, 1987gas phase; B,M

CN- + Ethanol, 2,2,2-trifluoro- = (CN- • Ethanol, 2,2,2-trifluoro-)

By formula: CN- + C2H3F3O = (CN- • C2H3F3O)

Quantity Value Units Method Reference Comment
Δr24.00 ± 0.80kcal/molTDAsLarson, Szulejko, et al., 1988gas phase; B,M
Δr24.6 ± 3.5kcal/molIMRELarson and McMahon, 1987gas phase; B,M
Quantity Value Units Method Reference Comment
Δr30.cal/mol*KPHPMSLarson, Szulejko, et al., 1988gas phase; M
Δr26.1cal/mol*KN/ALarson and McMahon, 1987gas phase; switching reaction,Thermochemical ladder(CN-)H2O, Entropy change calculated or estimated; Payzant, Yamdagni, et al., 1971; M
Quantity Value Units Method Reference Comment
Δr15.10 ± 0.20kcal/molTDAsLarson, Szulejko, et al., 1988gas phase; B
Δr16.4 ± 2.3kcal/molIMRELarson and McMahon, 1987gas phase; B,M

CN- + Pyrrole = (CN- • Pyrrole)

By formula: CN- + C4H5N = (CN- • C4H5N)

Quantity Value Units Method Reference Comment
Δr23.4 ± 1.0kcal/molTDAsMeot-ner, 1988, 2gas phase; B,M
Δr19.5 ± 3.5kcal/molIMRELarson and McMahon, 1987gas phase; B,M
Quantity Value Units Method Reference Comment
Δr27.1cal/mol*KPHPMSMeot-ner, 1988, 2gas phase; M
Δr23.8cal/mol*KN/ALarson and McMahon, 1987gas phase; switching reaction,Thermochemical ladder(CN-)H2O, Entropy change calculated or estimated; Payzant, Yamdagni, et al., 1971; M
Quantity Value Units Method Reference Comment
Δr15.3 ± 1.0kcal/molTDAsMeot-ner, 1988, 2gas phase; B
Δr12.3 ± 2.3kcal/molIMRELarson and McMahon, 1987gas phase; B,M

CN- + Ethanol = (CN- • Ethanol)

By formula: CN- + C2H6O = (CN- • C2H6O)

Quantity Value Units Method Reference Comment
Δr17.4 ± 1.0kcal/molTDAsMeot-ner, 1988, 2gas phase; B,M
Δr17.4 ± 3.5kcal/molIMRELarson and McMahon, 1987gas phase; B,M
Quantity Value Units Method Reference Comment
Δr22.5cal/mol*KPHPMSMeot-ner, 1988, 2gas phase; M
Δr24.5cal/mol*KN/ALarson and McMahon, 1987gas phase; switching reaction,Thermochemical ladder(CN-)H2O, Entropy change calculated or estimated; Payzant, Yamdagni, et al., 1971; M
Quantity Value Units Method Reference Comment
Δr10.7 ± 1.0kcal/molTDAsMeot-ner, 1988, 2gas phase; B
Δr10.0 ± 2.3kcal/molIMRELarson and McMahon, 1987gas phase; B,M

CN- + 1,1,2-Trifluoroethane = (CN- • 1,1,2-Trifluoroethane)

By formula: CN- + C2H3F3 = (CN- • C2H3F3)

Quantity Value Units Method Reference Comment
Δr18.4kcal/molICRLarson and McMahon, 1987gas phase; switching reaction,Thermochemical ladder(CN-)H2O, Entropy change calculated or estimated; Payzant, Yamdagni, et al., 1971; M
Quantity Value Units Method Reference Comment
Δr24.8cal/mol*KN/ALarson and McMahon, 1987gas phase; switching reaction,Thermochemical ladder(CN-)H2O, Entropy change calculated or estimated; Payzant, Yamdagni, et al., 1971; M
Quantity Value Units Method Reference Comment
Δr11.0kcal/molICRLarson and McMahon, 1987gas phase; switching reaction,Thermochemical ladder(CN-)H2O, Entropy change calculated or estimated; Payzant, Yamdagni, et al., 1971; M

CN- + 1,3-Difluoro-2-propanol = (CN- • 1,3-Difluoro-2-propanol)

By formula: CN- + C3H6F2O = (CN- • C3H6F2O)

Quantity Value Units Method Reference Comment
Δr23.5kcal/molICRLarson and McMahon, 1987gas phase; switching reaction,Thermochemical ladder(CN-)H2O, Entropy change calculated or estimated; Payzant, Yamdagni, et al., 1971; M
Quantity Value Units Method Reference Comment
Δr26.0cal/mol*KN/ALarson and McMahon, 1987gas phase; switching reaction,Thermochemical ladder(CN-)H2O, Entropy change calculated or estimated; Payzant, Yamdagni, et al., 1971; M
Quantity Value Units Method Reference Comment
Δr15.8kcal/molICRLarson and McMahon, 1987gas phase; switching reaction,Thermochemical ladder(CN-)H2O, Entropy change calculated or estimated; Payzant, Yamdagni, et al., 1971; M

CN- + C4H4F6O = (CN- • C4H4F6O)

By formula: CN- + C4H4F6O = (CN- • C4H4F6O)

Quantity Value Units Method Reference Comment
Δr25.7 ± 3.5kcal/molIMRELarson and McMahon, 1987gas phase; B,M,M
Quantity Value Units Method Reference Comment
Δr26.4cal/mol*KN/ALarson and McMahon, 1987gas phase; switching reaction,Thermochemical ladder(CN-)H2O, Entropy change calculated or estimated; Payzant, Yamdagni, et al., 1971; M
Δr26.4cal/mol*KN/ALarson and McMahon, 1987gas phase; switching reaction,Thermochemical ladder(CN-)H2O, Entropy change calculated or estimated; Payzant, Yamdagni, et al., 1971; M
Quantity Value Units Method Reference Comment
Δr17.8 ± 2.3kcal/molIMRELarson and McMahon, 1987gas phase; B,M,M

CN- + Hydrogen sulfide = (CN- • Hydrogen sulfide)

By formula: CN- + H2S = (CN- • H2S)

Quantity Value Units Method Reference Comment
Δr18.9 ± 1.0kcal/molTDEqMeot-ner, 1988, 2gas phase; B
Δr19.8 ± 3.5kcal/molIMRELarson and McMahon, 1987gas phase; B,M
Quantity Value Units Method Reference Comment
Δr23.8cal/mol*KN/ALarson and McMahon, 1987gas phase; switching reaction,Thermochemical ladder(CN-)H2O, Entropy change calculated or estimated; Payzant, Yamdagni, et al., 1971; M
Quantity Value Units Method Reference Comment
Δr12.9 ± 1.0kcal/molTDEqMeot-ner, 1988, 2gas phase; B
Δr12.4 ± 2.3kcal/molIMRELarson and McMahon, 1987gas phase; B,M

(CN- • 3Water) + Water = (CN- • 4Water)

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

Quantity Value Units Method Reference Comment
Δr9.8 ± 1.0kcal/molTDAsMeot-Ner (Mautner) M. and Speller, 1989gas phase; Entropy estimated; B,M
Quantity Value Units Method Reference Comment
Δr20.cal/mol*KN/AMeot-Ner (Mautner) and Speller, 1989gas phase; n, Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
Δr3.8 ± 1.4kcal/molTDAsMeot-Ner (Mautner) M. and Speller, 1989gas phase; Entropy estimated; B

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
4.6262.PHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n, Entropy change calculated or estimated; M

(CN- • 6Hydrogen cyanide) + Hydrogen cyanide = (CN- • 7Hydrogen cyanide)

By formula: (CN- • 6CHN) + CHN = (CN- • 7CHN)

Quantity Value Units Method Reference Comment
Δr7.6 ± 1.0kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; Entropy estimated; B,M
Quantity Value Units Method Reference Comment
Δr20.cal/mol*KN/AMeot-ner, Cybulski, et al., 1988gas phase; Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
Δr1.60kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; Entropy estimated; B

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
3.0238.PHPMSMeot-ner, Cybulski, et al., 1988gas phase; Entropy change calculated or estimated; M

(CN- • 2Hydrogen cyanide) + Hydrogen cyanide = (CN- • 3Hydrogen cyanide)

By formula: (CN- • 2CHN) + CHN = (CN- • 3CHN)

Quantity Value Units Method Reference Comment
Δr12.6kcal/molPHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n; M
Δr12.6kcal/molPHPMSMeot-ner, 1988, 2gas phase; M,B,M
Quantity Value Units Method Reference Comment
Δr21.2cal/mol*KPHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n; M
Δr21.2cal/mol*KPHPMSMeot-ner, Cybulski, et al., 1988gas phase; M
Δr21.2cal/mol*KPHPMSMeot-ner, 1988, 2gas phase; M
Quantity Value Units Method Reference Comment
Δr6.30kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B

(CN- • 3Hydrogen cyanide) + Hydrogen cyanide = (CN- • 4Hydrogen cyanide)

By formula: (CN- • 3CHN) + CHN = (CN- • 4CHN)

Quantity Value Units Method Reference Comment
Δr10.9kcal/molPHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n; M
Δr10.9kcal/molPHPMSMeot-ner, 1988, 2gas phase; M,B,M
Quantity Value Units Method Reference Comment
Δr24.8cal/mol*KPHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n; M
Δr24.8cal/mol*KPHPMSMeot-ner, Cybulski, et al., 1988gas phase; M
Δr24.8cal/mol*KPHPMSMeot-ner, 1988, 2gas phase; M
Quantity Value Units Method Reference Comment
Δr3.50kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B

(CN- • Hydrogen cyanide) + Hydrogen cyanide = (CN- • 2Hydrogen cyanide)

By formula: (CN- • CHN) + CHN = (CN- • 2CHN)

Quantity Value Units Method Reference Comment
Δr16.4kcal/molPHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n; M
Δr16.4kcal/molPHPMSMeot-ner, 1988, 2gas phase; M,B,M
Quantity Value Units Method Reference Comment
Δr21.8cal/mol*KPHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n; M
Δr21.8cal/mol*KPHPMSMeot-ner, Cybulski, et al., 1988gas phase; M
Δr21.8cal/mol*KPHPMSMeot-ner, 1988, 2gas phase; M
Quantity Value Units Method Reference Comment
Δr9.90kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B

(CN- • Water • 2Hydrogen cyanide) + Water = (CN- • 2Water • 2Hydrogen cyanide)

By formula: (CN- • H2O • 2CHN) + H2O = (CN- • 2H2O • 2CHN)

Quantity Value Units Method Reference Comment
Δr8.9 ± 1.0kcal/molTDAsMeot-Ner (Mautner) M. and Speller, 1989gas phase; Entropy estimated; B,M
Quantity Value Units Method Reference Comment
Δr20.cal/mol*KPHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n; M
Quantity Value Units Method Reference Comment
Δr2.9 ± 1.4kcal/molTDAsMeot-Ner (Mautner) M. and Speller, 1989gas phase; Entropy estimated; B

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
3.7262.PHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n; M

(CN- • 3Hydrogen cyanide) + Water = (CN- • Water • 3Hydrogen cyanide)

By formula: (CN- • 3CHN) + H2O = (CN- • H2O • 3CHN)

Quantity Value Units Method Reference Comment
Δr9.4 ± 1.0kcal/molTDAsMeot-Ner (Mautner) M. and Speller, 1989gas phase; Entropy estimated; B,M
Quantity Value Units Method Reference Comment
Δr20.cal/mol*KPHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n; M
Quantity Value Units Method Reference Comment
Δr3.4 ± 1.4kcal/molTDAsMeot-Ner (Mautner) M. and Speller, 1989gas phase; Entropy estimated; B

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
4.2262.PHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n; M

(CN- • 4Hydrogen cyanide) + Hydrogen cyanide = (CN- • 5Hydrogen cyanide)

By formula: (CN- • 4CHN) + CHN = (CN- • 5CHN)

Quantity Value Units Method Reference Comment
Δr9.8 ± 1.0kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B,M
Δr9.8kcal/molPHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n; M
Quantity Value Units Method Reference Comment
Δr20.2cal/mol*KPHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n; M
Δr20.2cal/mol*KPHPMSMeot-ner, Cybulski, et al., 1988gas phase; M
Quantity Value Units Method Reference Comment
Δr3.80kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B

(CN- • Water) + Water = (CN- • 2Water)

By formula: (CN- • H2O) + H2O = (CN- • 2H2O)

Quantity Value Units Method Reference Comment
Δr11.7 ± 1.0kcal/molTDAsMeot-Ner (Mautner) M. and Speller, 1989gas phase; B,M
Δr11.7kcal/molPHPMSMeot-ner, 1988, 2gas phase; M
Quantity Value Units Method Reference Comment
Δr18.1cal/mol*KPHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n; M
Δr18.1cal/mol*KPHPMSMeot-ner, 1988, 2gas phase; M
Quantity Value Units Method Reference Comment
Δr6.3 ± 1.4kcal/molTDAsMeot-Ner (Mautner) M. and Speller, 1989gas phase; B

CN- + C2F4O = (CN- • C2F4O)

By formula: CN- + C2F4O = (CN- • C2F4O)

Quantity Value Units Method Reference Comment
Δr35.cal/mol*KN/ALarson, Szulejko, et al., 1988gas phase; switching reaction,Thermochemical ladder(CN-)H2O, Entropy change calculated or estimated; Payzant, Yamdagni, et al., 1971; M
Δr35.cal/mol*KN/ALarson, Szulejko, et al., 1988gas phase; switching reaction,Thermochemical ladder(CN-)H2O, Entropy change calculated or estimated; Payzant, Yamdagni, et al., 1971; M

CN- + Phosphoryl fluoride = (CN- • Phosphoryl fluoride)

By formula: CN- + F3OP = (CN- • F3OP)

Quantity Value Units Method Reference Comment
Δr23.5 ± 1.0kcal/molIMRELarson, Szulejko, et al., 1988gas phase; B,M
Quantity Value Units Method Reference Comment
Δr30.cal/mol*KN/ALarson, Szulejko, et al., 1988gas phase; switching reaction,Thermochemical ladder(CN-)H2O, Entropy change calculated or estimated; Payzant, Yamdagni, et al., 1971; M
Quantity Value Units Method Reference Comment
Δr14.60 ± 0.50kcal/molIMRELarson, Szulejko, et al., 1988gas phase; B,M

CN- + Pentafluorodimethyl ether = (CN- • Pentafluorodimethyl ether)

By formula: CN- + C2HF5O = (CN- • C2HF5O)

Quantity Value Units Method Reference Comment
Δr18.7 ± 3.5kcal/molIMRELarson and McMahon, 1987gas phase; B,M
Quantity Value Units Method Reference Comment
Δr24.9cal/mol*KN/ALarson and McMahon, 1987gas phase; switching reaction,Thermochemical ladder(CN-)H2O, Entropy change calculated or estimated; Payzant, Yamdagni, et al., 1971; M
Quantity Value Units Method Reference Comment
Δr11.3 ± 2.3kcal/molIMRELarson and McMahon, 1987gas phase; B,M

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

By formula: CN- + F4S = (CN- • F4S)

Quantity Value Units Method Reference Comment
Δr25.8 ± 1.0kcal/molIMRELarson, Szulejko, et al., 1988gas phase; B,M
Quantity Value Units Method Reference Comment
Δr30.cal/mol*KN/ALarson, Szulejko, et al., 1988gas phase; switching reaction,Thermochemical ladder(CN-)H2O, Entropy change calculated or estimated; Payzant, Yamdagni, et al., 1971; M
Quantity Value Units Method Reference Comment
Δr16.90 ± 0.50kcal/molIMRELarson, Szulejko, et al., 1988gas phase; B,M

CN- + Silicon tetrafluoride = (CN- • Silicon tetrafluoride)

By formula: CN- + F4Si = (CN- • F4Si)

Quantity Value Units Method Reference Comment
Δr27.2 ± 1.0kcal/molIMRELarson, Szulejko, et al., 1988gas phase; B,M
Quantity Value Units Method Reference Comment
Δr30.cal/mol*KN/ALarson, Szulejko, et al., 1988gas phase; switching reaction,Thermochemical ladder(CN-)H2O, Entropy change calculated or estimated; Payzant, Yamdagni, et al., 1971; M
Quantity Value Units Method Reference Comment
Δr18.30 ± 0.50kcal/molIMRELarson, Szulejko, et al., 1988gas phase; B,M

CN- + trifluoroarsine = (CN- • trifluoroarsine)

By formula: CN- + AsF3 = (CN- • AsF3)

Quantity Value Units Method Reference Comment
Δr24.9 ± 1.0kcal/molIMRELarson, Szulejko, et al., 1988gas phase; B,M
Quantity Value Units Method Reference Comment
Δr28.cal/mol*KN/ALarson, Szulejko, et al., 1988gas phase; switching reaction,Thermochemical ladder(CN-)H2O, Entropy change calculated or estimated; Payzant, Yamdagni, et al., 1971; M
Quantity Value Units Method Reference Comment
Δr16.60 ± 0.50kcal/molIMRELarson, Szulejko, et al., 1988gas phase; B,M

CN- + Thionyl fluoride = (CN- • Thionyl fluoride)

By formula: CN- + F2OS = (CN- • F2OS)

Quantity Value Units Method Reference Comment
Δr15.8 ± 1.0kcal/molIMRELarson, Szulejko, et al., 1988gas phase; B,M
Quantity Value Units Method Reference Comment
Δr30.cal/mol*KN/ALarson, Szulejko, et al., 1988gas phase; switching reaction,Thermochemical ladder(CN-)H2O, Entropy change calculated or estimated; Payzant, Yamdagni, et al., 1971; M
Quantity Value Units Method Reference Comment
Δr6.90 ± 0.50kcal/molIMRELarson, Szulejko, et al., 1988gas phase; B,M

CN- + Phosphorus trifluoride = (CN- • Phosphorus trifluoride)

By formula: CN- + F3P = (CN- • F3P)

Quantity Value Units Method Reference Comment
Δr15.3 ± 1.0kcal/molIMRELarson, Szulejko, et al., 1988gas phase; B,M
Quantity Value Units Method Reference Comment
Δr30.cal/mol*KN/ALarson, Szulejko, et al., 1988gas phase; switching reaction,Thermochemical ladder(CN-)H2O, Entropy change calculated or estimated; Payzant, Yamdagni, et al., 1971; M
Quantity Value Units Method Reference Comment
Δr6.40 ± 0.50kcal/molIMRELarson, Szulejko, et al., 1988gas phase; B,M

CN- + 2-Chloroethanol = (CN- • 2-Chloroethanol)

By formula: CN- + C2H5ClO = (CN- • C2H5ClO)

Quantity Value Units Method Reference Comment
Δr21.1 ± 3.5kcal/molIMRELarson and McMahon, 1987gas phase; B,M
Quantity Value Units Method Reference Comment
Δr25.5cal/mol*KN/ALarson and McMahon, 1987gas phase; switching reaction,Thermochemical ladder(CN-)H2O, Entropy change calculated or estimated; Payzant, Yamdagni, et al., 1971; M
Quantity Value Units Method Reference Comment
Δr13.5 ± 2.3kcal/molIMRELarson and McMahon, 1987gas phase; B,M

CN- + Boric acid, trimethyl ester = (CN- • Boric acid, trimethyl ester)

By formula: CN- + C3H9BO3 = (CN- • C3H9BO3)

Quantity Value Units Method Reference Comment
Δr19.6 ± 1.0kcal/molIMRELarson, Szulejko, et al., 1988gas phase; B,M
Quantity Value Units Method Reference Comment
Δr35.cal/mol*KN/ALarson, Szulejko, et al., 1988gas phase; switching reaction,Thermochemical ladder(CN-)H2O, Entropy change calculated or estimated; Payzant, Yamdagni, et al., 1971; M
Quantity Value Units Method Reference Comment
Δr10.70 ± 0.50kcal/molIMRELarson, Szulejko, et al., 1988gas phase; B,M

CN- + 1,1,1',1'-Tetrafluorodimethyl ether = (CN- • 1,1,1',1'-Tetrafluorodimethyl ether)

By formula: CN- + C2H2F4O = (CN- • C2H2F4O)

Quantity Value Units Method Reference Comment
Δr22.0 ± 3.5kcal/molIMRELarson and McMahon, 1987gas phase; B,M
Quantity Value Units Method Reference Comment
Δr26.cal/mol*KN/ALarson and McMahon, 1987gas phase; switching reaction,Thermochemical ladder(CN-)H2O, Entropy change calculated or estimated; Payzant, Yamdagni, et al., 1971; M
Quantity Value Units Method Reference Comment
Δr15.1 ± 2.3kcal/molIMRELarson and McMahon, 1987gas phase; B,M

CN- + Carbonic difluoride = (CN- • Carbonic difluoride)

By formula: CN- + CF2O = (CN- • CF2O)

Quantity Value Units Method Reference Comment
Δr23.5 ± 1.0kcal/molIMRELarson, Szulejko, et al., 1988gas phase; B,M
Quantity Value Units Method Reference Comment
Δr35.cal/mol*KN/ALarson, Szulejko, et al., 1988gas phase; switching reaction,Thermochemical ladder(CN-)H2O, Entropy change calculated or estimated; Payzant, Yamdagni, et al., 1971; M
Quantity Value Units Method Reference Comment
Δr13.10 ± 0.50kcal/molIMRELarson, Szulejko, et al., 1988gas phase; B,M

CN- + Ethanol, 2-fluoro- = (CN- • Ethanol, 2-fluoro-)

By formula: CN- + C2H5FO = (CN- • C2H5FO)

Quantity Value Units Method Reference Comment
Δr20.4 ± 3.5kcal/molIMRELarson and McMahon, 1987gas phase; B,M
Quantity Value Units Method Reference Comment
Δr25.3cal/mol*KN/ALarson and McMahon, 1987gas phase; switching reaction,Thermochemical ladder(CN-)H2O, Entropy change calculated or estimated; Payzant, Yamdagni, et al., 1971; M
Quantity Value Units Method Reference Comment
Δr12.9 ± 2.3kcal/molIMRELarson and McMahon, 1987gas phase; B,M

CN- + Silane, trifluoromethyl- = (CN- • Silane, trifluoromethyl-)

By formula: CN- + CH3F3Si = (CN- • CH3F3Si)

Quantity Value Units Method Reference Comment
Δr22.6 ± 1.0kcal/molIMRELarson, Szulejko, et al., 1988gas phase; B,M
Quantity Value Units Method Reference Comment
Δr30.cal/mol*KN/ALarson, Szulejko, et al., 1988gas phase; switching reaction,Thermochemical ladder(CN-)H2O, Entropy change calculated or estimated; Payzant, Yamdagni, et al., 1971; M
Quantity Value Units Method Reference Comment
Δr13.70 ± 0.50kcal/molIMRELarson, Szulejko, et al., 1988gas phase; B,M

CN- + 2-Propanone, 1,1,1-trifluoro- = (CN- • 2-Propanone, 1,1,1-trifluoro-)

By formula: CN- + C3H3F3O = (CN- • C3H3F3O)

Quantity Value Units Method Reference Comment
Δr20.4 ± 3.5kcal/molIMRELarson and McMahon, 1987gas phase; B,M
Quantity Value Units Method Reference Comment
Δr25.3cal/mol*KN/ALarson and McMahon, 1987gas phase; switching reaction,Thermochemical ladder(CN-)H2O, Entropy change calculated or estimated; Payzant, Yamdagni, et al., 1971; M
Quantity Value Units Method Reference Comment
Δr12.9 ± 2.3kcal/molIMRELarson and McMahon, 1987gas phase; B,M

CN- + 2-Propanone, 1,1,1,3,3-pentafluoro- = (CN- • 2-Propanone, 1,1,1,3,3-pentafluoro-)

By formula: CN- + C3HF5O = (CN- • C3HF5O)

Quantity Value Units Method Reference Comment
Δr25.8 ± 3.5kcal/molIMRELarson and McMahon, 1987gas phase; B,M
Quantity Value Units Method Reference Comment
Δr26.4cal/mol*KN/ALarson and McMahon, 1987gas phase; switching reaction,Thermochemical ladder(CN-)H2O, Entropy change calculated or estimated; Payzant, Yamdagni, et al., 1971; M
Quantity Value Units Method Reference Comment
Δr17.9 ± 2.3kcal/molIMRELarson and McMahon, 1987gas phase; B,M

CN- + Carbonocyanidic acid, ethyl ester = (CN- • Carbonocyanidic acid, ethyl ester)

By formula: CN- + C4H5NO2 = (CN- • C4H5NO2)

Quantity Value Units Method Reference Comment
Δr17.4 ± 3.5kcal/molIMRELarson and McMahon, 1987gas phase; B,M
Quantity Value Units Method Reference Comment
Δr24.5cal/mol*KN/ALarson and McMahon, 1987gas phase; switching reaction,Thermochemical ladder(CN-)H2O, Entropy change calculated or estimated; Payzant, Yamdagni, et al., 1971; M
Quantity Value Units Method Reference Comment
Δr10.0 ± 2.3kcal/molIMRELarson and McMahon, 1987gas phase; B,M

CN- + Trichloromethane = (CN- • Trichloromethane)

By formula: CN- + CHCl3 = (CN- • CHCl3)

Quantity Value Units Method Reference Comment
Δr18.2 ± 3.5kcal/molIMRELarson and McMahon, 1987gas phase; B,M
Quantity Value Units Method Reference Comment
Δr24.8cal/mol*KN/ALarson and McMahon, 1987gas phase; switching reaction,Thermochemical ladder(CN-)H2O, Entropy change calculated or estimated; Payzant, Yamdagni, et al., 1971; M
Quantity Value Units Method Reference Comment
Δr10.8 ± 2.3kcal/molIMRELarson and McMahon, 1987gas phase; B,M

CN- + Fluorodichloromethane = (CN- • Fluorodichloromethane)

By formula: CN- + CHCl2F = (CN- • CHCl2F)

Quantity Value Units Method Reference Comment
Δr17.8 ± 3.5kcal/molIMRELarson and McMahon, 1987gas phase; B,M
Quantity Value Units Method Reference Comment
Δr24.7cal/mol*KN/ALarson and McMahon, 1987gas phase; switching reaction,Thermochemical ladder(CN-)H2O, Entropy change calculated or estimated; Payzant, Yamdagni, et al., 1971; M
Quantity Value Units Method Reference Comment
Δr10.4 ± 2.3kcal/molIMRELarson and McMahon, 1987gas phase; B,M

CN- + 2-Propanol, 2-methyl- = (CN- • 2-Propanol, 2-methyl-)

By formula: CN- + C4H10O = (CN- • C4H10O)

Quantity Value Units Method Reference Comment
Δr18.1 ± 3.5kcal/molIMRELarson and McMahon, 1987gas phase; B,M
Quantity Value Units Method Reference Comment
Δr24.8cal/mol*KN/ALarson and McMahon, 1987gas phase; switching reaction,Thermochemical ladder(CN-)H2O, Entropy change calculated or estimated; Payzant, Yamdagni, et al., 1971; M
Quantity Value Units Method Reference Comment
Δr10.7 ± 2.3kcal/molIMRELarson and McMahon, 1987gas phase; B,M

CN- + 2-Propanol, 1,1,1,3,3,3-hexafluoro- = (CN- • 2-Propanol, 1,1,1,3,3,3-hexafluoro-)

By formula: CN- + C3H2F6O = (CN- • C3H2F6O)

Quantity Value Units Method Reference Comment
Δr25.0 ± 3.5kcal/molIMRELarson and McMahon, 1987gas phase; B,M
Quantity Value Units Method Reference Comment
Δr26.cal/mol*KN/ALarson and McMahon, 1987gas phase; switching reaction,Thermochemical ladder(CN-)H2O, Entropy change calculated or estimated; Payzant, Yamdagni, et al., 1971; M
Quantity Value Units Method Reference Comment
Δr16.8 ± 2.3kcal/molIMRELarson and McMahon, 1987gas phase; B,M

CN- + Acetone = (CN- • Acetone)

By formula: CN- + C3H6O = (CN- • C3H6O)

Quantity Value Units Method Reference Comment
Δr14.7 ± 3.5kcal/molIMRELarson and McMahon, 1987gas phase; B,M
Quantity Value Units Method Reference Comment
Δr22.5cal/mol*KN/ALarson and McMahon, 1987gas phase; switching reaction,Thermochemical ladder(CN-)H2O, Entropy change calculated or estimated; Payzant, Yamdagni, et al., 1971; M
Quantity Value Units Method Reference Comment
Δr8.0 ± 2.3kcal/molIMRELarson and McMahon, 1987gas phase; B,M

CN- + Methylene chloride = (CN- • Methylene chloride)

By formula: CN- + CH2Cl2 = (CN- • CH2Cl2)

Quantity Value Units Method Reference Comment
Δr16.3 ± 3.5kcal/molIMRELarson and McMahon, 1987gas phase; B,M
Quantity Value Units Method Reference Comment
Δr24.2cal/mol*KN/ALarson and McMahon, 1987gas phase; switching reaction,Thermochemical ladder(CN-)H2O, Entropy change calculated or estimated; Payzant, Yamdagni, et al., 1971; M
Quantity Value Units Method Reference Comment
Δr9.0 ± 2.3kcal/molIMRELarson and McMahon, 1987gas phase; B,M

CN- + Fluoroform = (CN- • Fluoroform)

By formula: CN- + CHF3 = (CN- • CHF3)

Quantity Value Units Method Reference Comment
Δr17.0 ± 3.5kcal/molIMRELarson and McMahon, 1987gas phase; B,M
Quantity Value Units Method Reference Comment
Δr24.4cal/mol*KN/ALarson and McMahon, 1987gas phase; switching reaction,Thermochemical ladder(CN-)H2O, Entropy change calculated or estimated; Payzant, Yamdagni, et al., 1971; M
Quantity Value Units Method Reference Comment
Δr9.6 ± 2.3kcal/molIMRELarson and McMahon, 1987gas phase; B,M

CN- + Silane, difluorodimethyl- = (CN- • Silane, difluorodimethyl-)

By formula: CN- + C2H6F2Si = (CN- • C2H6F2Si)

Quantity Value Units Method Reference Comment
Δr16.8 ± 1.0kcal/molIMRELarson, Szulejko, et al., 1988gas phase; B,M
Quantity Value Units Method Reference Comment
Δr30.cal/mol*KN/ALarson, Szulejko, et al., 1988gas phase; switching reaction,Thermochemical ladder(CN-)H2O, Entropy change calculated or estimated; Payzant, Yamdagni, et al., 1971; M

(CN- • Water • Hydrogen cyanide) + Water = (CN- • 2Water • Hydrogen cyanide)

By formula: (CN- • H2O • CHN) + H2O = (CN- • 2H2O • CHN)

Quantity Value Units Method Reference Comment
Δr9.5 ± 1.0kcal/molTDAsMeot-Ner (Mautner) M. and Speller, 1989gas phase; B,M
Quantity Value Units Method Reference Comment
Δr17.5cal/mol*KPHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n; M
Quantity Value Units Method Reference Comment
Δr4.2 ± 1.4kcal/molTDAsMeot-Ner (Mautner) M. and Speller, 1989gas phase; B

(CN- • 2Hydrogen cyanide) + Water = (CN- • Water • 2Hydrogen cyanide)

By formula: (CN- • 2CHN) + H2O = (CN- • H2O • 2CHN)

Quantity Value Units Method Reference Comment
Δr7.7 ± 1.0kcal/molTDAsMeot-Ner (Mautner) M. and Speller, 1989gas phase; B,M
Quantity Value Units Method Reference Comment
Δr12.5cal/mol*KPHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n; M
Quantity Value Units Method Reference Comment
Δr4.0 ± 1.4kcal/molTDAsMeot-Ner (Mautner) M. and Speller, 1989gas phase; B

Gas phase ion energetics data

Go To: Top, Reaction thermochemistry data, References, Notes

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

Data compiled by: John E. Bartmess

Protonation reactions

CN- + Hydrogen cation = Hydrogen cyanide

By formula: CN- + H+ = CHN

Quantity Value Units Method Reference Comment
Δr349.8 ± 1.0kcal/molCIDTAkin and Ervin, 2006gas phase
Δr350.50 ± 0.17kcal/molD-EABradforth, Kim, et al., 1993gas phase
Δr351.1 ± 2.1kcal/molG+TSBartmess, Scott, et al., 1979gas phase; value altered from reference due to change in acidity scale
Quantity Value Units Method Reference Comment
Δr342.5 ± 1.1kcal/molH-TSAkin and Ervin, 2006gas phase
Δr343.17 ± 0.27kcal/molH-TSBradforth, Kim, et al., 1993gas phase
Δr343.8 ± 2.0kcal/molIMREBartmess, Scott, et al., 1979gas phase; value altered from reference due to change in acidity scale

References

Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, Notes

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

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]

Meot-ner, 1988
Meot-ner, M., The Ionic Hydrogen Bond and Solvation. 7. Interaction Energies of Carbanions with Solvent Molecules, J. Am. Chem. Soc., 1988, 110, 12, 3858, https://doi.org/10.1021/ja00220a022 . [all data]

Payzant, Yamdagni, et al., 1971
Payzant, J.D.; Yamdagni, R.; Kebarle, P., Hydration of CN-, NO2-, NO3-, and HO- in the gas phase, Can. J. Chem., 1971, 49, 3308. [all data]

Meot-Ner (Mautner) and Speller, 1989
Meot-Ner (Mautner), M.; Speller, C.V., Multicomponent Cluster Ions.3. Comparative Stabilities of Cationic and Anionic Hydrogen Bonded Networks. Mixed Clusters of Water and Hydrogen Cyanide, J. Phys. Chem., 1989, 93, 6580. [all data]

Meot-ner, 1988, 2
Meot-ner, M., Ionic Hydrogen Bond and Ion Solvation. 6. Interaction Energies of the Acetate Ion with Organic Molecules. Comparison of CH3COO- with Cl-, CN-, and SH-, J. Am. Chem. Soc., 1988, 110, 12, 3854, https://doi.org/10.1021/ja00220a022 . [all data]

Larson and McMahon, 1987
Larson, J.W.; McMahon, T.B., Hydrogen bonding in gas phase anions. The energetics of interaction between cyanide ion and bronsted acids, J. Am. Chem. Soc., 1987, 109, 6230. [all data]

Larson and McMahon, 1984
Larson, J.W.; McMahon, T.B., Gas phase bihalide and pseudohalide ions. An ICR determination of hydrogen bond energies in XHY- species (X,Y = F, Cl, Br, CN), Inorg. Chem., 1984, 23, 2029. [all data]

Meot-ner, Cybulski, et al., 1988
Meot-ner, M.; Cybulski, S.M.; Scheiner, S.; Liebman, J.F., Is CN- Significantly Anisotropic? Comparison of CN- vs. Cl-: Clustering with HCN and Condensed Phase Thermochemistry, J. Phys. Chem., 1988, 92, 10, 2738, https://doi.org/10.1021/j100321a009 . [all data]

Hiraoka, Mizure, et al., 1988
Hiraoka, K.; Mizure, S.; Yamabe, S.; Nakatsuji, Y., Gas Phase Clustering Reactions of CN- and CH2CN- with MeCN, Chem. Phys. Lett., 1988, 148, 6, 497, https://doi.org/10.1016/0009-2614(88)80320-8 . [all data]

Akin and Ervin, 2006
Akin, F.A.; Ervin, K.M., Collision-induced dissociation of HS-(HCN): Unsymmetrical hydrogen bonding in a proton-bound dimer anion, J. Phys. Chem. A, 2006, 110, 4, 1342-1349, https://doi.org/10.1021/jp0540454 . [all data]

Bradforth, Kim, et al., 1993
Bradforth, S.E.; Kim, E.H.; Arnold, D.W.; Neumark, D.M., Photoelectron Spectroscopy of CN-, NCO-, and NCS-, J. Chem. Phys., 1993, 98, 2, 800, https://doi.org/10.1063/1.464244 . [all data]

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

Meot-Ner (Mautner) M. and Speller, 1989
Meot-Ner (Mautner) M.; Speller, C.V., Multicomponent Cluster Ions. 2. Comparative Stabilities of Cationic and Anionic Hydrogen Bonded Networks. Mixed Clusters of Water and Hydrogen Cyanide, J. Phys. Chem., 1989, 93, 9, 3663, https://doi.org/10.1021/j100346a058 . [all data]


Notes

Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, References