Acetonitrile

Data at NIST subscription sites:

NIST subscription sites provide data under the NIST Standard Reference Data Program, but require an annual fee to access. The purpose of the fee is to recover costs associated with the development of data collections included in such sites. Your institution may already be a subscriber. Follow the links above to find out more about the data in these sites and their terms of usage.


Gas phase thermochemistry data

Go To: Top, Reaction thermochemistry data, 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 by: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Quantity Value Units Method Reference Comment
Δfgas74.04 ± 0.37kJ/molCcrAn and Mansson, 1983 
Δfgas65.86kJ/molCcrHall and Baldt, 1971 

Reaction thermochemistry data

Go To: Top, Gas phase thermochemistry data, 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
MS - José A. Martinho Simões
RCD - Robert C. Dunbar

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 + Acetonitrile = (Chlorine anion • Acetonitrile)

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

Quantity Value Units Method Reference Comment
Δr61. ± 10.kJ/molAVGN/AAverage of 6 values; Individual data points
Quantity Value Units Method Reference Comment
Δr65.7J/mol*KPHPMSHiraoka, Mizuse, et al., 1988gas phase; M
Δr65.7J/mol*KPHPMSYamabe, Furumiya, et al., 1986gas phase; M
Δr59.8J/mol*KPHPMSSieck, 1985gas phase; M
Δr59.8J/mol*KPHPMSYamdagni and Kebarle, 1972gas phase; M
Δr89.5J/mol*KN/ALarson and McMahon, 1984gas phase; switching reaction(Cl-)CF3H, Entropy change calculated or estimated; Larson and McMahon, 1984, 2; M
Quantity Value Units Method Reference Comment
Δr42.68 ± 0.84kJ/molTDAsLi, Ross, et al., 1996gas phase; B
Δr38. ± 8.4kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B
Δr37. ± 11.kJ/molTDAsYamabe, Furumiya, et al., 1986gas phase; B
Δr42.26 ± 0.84kJ/molTDAsSieck, 1985gas phase; B
Δr38. ± 8.4kJ/molTDAsYamdagni and Kebarle, 1972gas phase; B

Bromine anion + Acetonitrile = (Bromine anion • Acetonitrile)

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

Quantity Value Units Method Reference Comment
Δr59.8 ± 4.2kJ/molTDAsLi, Ross, et al., 1996gas phase; B
Δr50.6 ± 1.7kJ/molN/AMarkovich, Perera, et al., 1996gas phase; B
Δr54.0 ± 1.7kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B,M
Δr54.0 ± 8.4kJ/molTDAsYamdagni and Kebarle, 1972gas phase; B,M
Δr54.0kJ/molHPMSCaldwell, Masucci, et al., 1989gas phase; M
Quantity Value Units Method Reference Comment
Δr51.0J/mol*KPHPMSHiraoka, Mizuse, et al., 1988gas phase; M
Δr69.0J/mol*KHPMSYamdagni and Kebarle, 1972gas phase; M
Quantity Value Units Method Reference Comment
Δr36.4 ± 0.84kJ/molTDAsLi, Ross, et al., 1996gas phase; B
Δr37. ± 8.4kJ/molIMRETanabe, Morgon, et al., 1996gas phase; Anchored to H2O..Br- of Hiraoka, Mizure, et al., 19882; B
Δr38.5 ± 2.9kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B
Δr33. ± 8.4kJ/molTDAsYamdagni and Kebarle, 1972gas phase; B

Iodide + Acetonitrile = (Iodide • Acetonitrile)

By formula: I- + C2H3N = (I- • C2H3N)

Quantity Value Units Method Reference Comment
Δr49.8 ± 8.4kJ/molTDAsYamdagni and Kebarle, 1972gas phase; B,M
Δr46.4 ± 1.7kJ/molN/AMarkovich, Perera, et al., 1996gas phase; B
Δr46.4 ± 4.6kJ/molLPESDessent, Bailey, et al., 1995gas phase; B
Δr46.02 ± 0.84kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B,M
Δr50.kJ/molPHPMSCaldwell, Masucci, et al., 1989gas phase; M
Quantity Value Units Method Reference Comment
Δr57.7J/mol*KPHPMSHiraoka, Mizuse, et al., 1988gas phase; M
Δr76.1J/mol*KPHPMSYamdagni and Kebarle, 1972gas phase; M
Quantity Value Units Method Reference Comment
Δr27. ± 8.4kJ/molTDAsYamdagni and Kebarle, 1972gas phase; B
Δr28. ± 8.4kJ/molIMRETanabe, Morgon, et al., 1996gas phase; Anchored to H2O..I- of Caldwell and Kebarle, 1984; B
Δr28.9 ± 2.1kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B

CN- + Acetonitrile = (CN- • Acetonitrile)

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

Quantity Value Units Method Reference Comment
Δr57.7 ± 4.2kJ/molTDAsMeot-ner, 1988gas phase; B,M
Δr69. ± 15.kJ/molIMRELarson and McMahon, 1987gas phase; B,M
Δr65.69kJ/molTDAsHiraoka, Mizure, et al., 1988gas phase; B,M
Quantity Value Units Method Reference Comment
Δr90.8J/mol*KPHPMSHiraoka, Mizure, et al., 1988gas phase; M
Δr59.4J/mol*KPHPMSMeot-ner, 1988gas phase; M
Δr102.J/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
Δr40. ± 4.2kJ/molTDAsMeot-ner, 1988gas phase; B
Δr38. ± 9.6kJ/molIMRELarson and McMahon, 1987gas phase; B,M
Δr38.5kJ/molTDAsHiraoka, Mizure, et al., 1988gas phase; B

C2H2N- + Hydrogen cation = Acetonitrile

By formula: C2H2N- + H+ = C2H3N

Quantity Value Units Method Reference Comment
Δr1560. ± 8.8kJ/molG+TSBartmess, Scott, et al., 1979gas phase; value altered from reference due to change in acidity scale; B
Δr1544. ± 19.kJ/molCIDTGraul and Squires, 1990gas phase; B
Δr1562. ± 11.kJ/molG+TSCumming and Kebarle, 1978gas phase; B
Δr1568. ± 8.4kJ/molD-EAZimmerman and Brauman, 1977gas phase; B
Δr1534. ± 19.kJ/molEIAEHeni and Illenberger, 1986gas phase; From MeCN; B
Quantity Value Units Method Reference Comment
Δr1528. ± 8.4kJ/molIMREBartmess, Scott, et al., 1979gas phase; value altered from reference due to change in acidity scale; B
Δr1530. ± 8.4kJ/molIMRECumming and Kebarle, 1978gas phase; B
Δr1536. ± 8.8kJ/molH-TSZimmerman and Brauman, 1977gas phase; B

(Iodide • Acetonitrile) + Acetonitrile = (Iodide • 2Acetonitrile)

By formula: (I- • C2H3N) + C2H3N = (I- • 2C2H3N)

Quantity Value Units Method Reference Comment
Δr43.51 ± 0.84kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B,M
Δr46.4 ± 2.9kJ/molN/AMarkovich, Perera, et al., 1996gas phase; B
Δr46.4 ± 1.7kJ/molN/ADessent, Bailey, et al., 1995gas phase; Vertical Detachment Energy: 2.25±0.08 eV.; B
Δr43.93kJ/molTDAsYamdagni and Kebarle, 1972gas phase; B,M
Quantity Value Units Method Reference Comment
Δr77.0J/mol*KPHPMSHiraoka, Mizuse, et al., 1988gas phase; M
Δr87.0J/mol*KPHPMSYamdagni and Kebarle, 1972gas phase; M
Quantity Value Units Method Reference Comment
Δr20.5 ± 3.3kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B
Δr18.0kJ/molTDAsYamdagni and Kebarle, 1972gas phase; B

C2H4N+ + Acetonitrile = (C2H4N+ • Acetonitrile)

By formula: C2H4N+ + C2H3N = (C2H4N+ • C2H3N)

Quantity Value Units Method Reference Comment
Δr130. ± 9.6kJ/molCIDHonma, Sunderlin, et al., 1993gas phase; guided ion beam CID; M
Δr121.kJ/molPHPMSAllison, Cramer, et al., 1991gas phase; M
Δr125.kJ/molPHPMSDeakyne, Meot-Ner (Mautner), et al., 1986gas phase; n; M
Δr125.kJ/molPHPMSSpeller and Meot-Ner (Mautner), 1985gas phase; M
Δr126.kJ/molPHPMSMeot-Ner (Mautner), 1978gas phase; M
Quantity Value Units Method Reference Comment
Δr114.J/mol*KPHPMSAllison, Cramer, et al., 1991gas phase; M
Δr104.J/mol*KPHPMSDeakyne, Meot-Ner (Mautner), et al., 1986gas phase; n; M
Δr103.J/mol*KPHPMSSpeller and Meot-Ner (Mautner), 1985gas phase; M
Δr120.J/mol*KPHPMSMeot-Ner (Mautner), 1978gas phase; M

Fluorine anion + Acetonitrile = (Fluorine anion • Acetonitrile)

By formula: F- + C2H3N = (F- • C2H3N)

Quantity Value Units Method Reference Comment
Δr103. ± 8.4kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; Discrepancy with Yamdagni and Kebarle, 1972 "not resolved; B,M
Δr66.9 ± 8.4kJ/molTDAsYamdagni and Kebarle, 1972gas phase; B,M
Quantity Value Units Method Reference Comment
Δr95.8J/mol*KPHPMSHiraoka, Mizuse, et al., 1988gas phase; M
Δr56.1J/mol*KPHPMSYamdagni and Kebarle, 1972gas phase; Entropy change is questionable; M
Quantity Value Units Method Reference Comment
Δr74. ± 14.kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; Discrepancy with Yamdagni and Kebarle, 1972 "not resolved; B
Δr50.2 ± 8.4kJ/molTDAsYamdagni and Kebarle, 1972gas phase; B

(Chlorine anion • 3Acetonitrile) + Acetonitrile = (Chlorine anion • 4Acetonitrile)

By formula: (Cl- • 3C2H3N) + C2H3N = (Cl- • 4C2H3N)

Quantity Value Units Method Reference Comment
Δr45.6 ± 1.3kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B,M
Δr37.7 ± 3.3kJ/molN/AMarkovich, Perera, et al., 1996gas phase; B
Δr25.9kJ/molTDAsYamdagni and Kebarle, 1972gas phase; B,M
Quantity Value Units Method Reference Comment
Δr111.J/mol*KPHPMSHiraoka, Mizuse, et al., 1988gas phase; M
Δr45.2J/mol*KPHPMSYamdagni and Kebarle, 1972gas phase; Entropy change is questionable; M
Quantity Value Units Method Reference Comment
Δr12. ± 5.0kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B
Δr12.6kJ/molTDAsYamdagni and Kebarle, 1972gas phase; B

(Bromine anion • 3Acetonitrile) + Acetonitrile = (Bromine anion • 4Acetonitrile)

By formula: (Br- • 3C2H3N) + C2H3N = (Br- • 4C2H3N)

Quantity Value Units Method Reference Comment
Δr36.4 ± 1.3kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B,M
Δr35.6 ± 3.3kJ/molN/AMarkovich, Perera, et al., 1996gas phase; B
Δr23.0kJ/molTDAsYamdagni and Kebarle, 1972gas phase; B,M
Quantity Value Units Method Reference Comment
Δr82.0J/mol*KPHPMSHiraoka, Mizuse, et al., 1988gas phase; M
Δr45.6J/mol*KHPMSYamdagni and Kebarle, 1972gas phase; Entropy change is questionable; M
Quantity Value Units Method Reference Comment
Δr12. ± 5.0kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B
Δr9.20kJ/molTDAsYamdagni and Kebarle, 1972gas phase; B

(Chlorine anion • 2Acetonitrile) + Acetonitrile = (Chlorine anion • 3Acetonitrile)

By formula: (Cl- • 2C2H3N) + C2H3N = (Cl- • 3C2H3N)

Quantity Value Units Method Reference Comment
Δr46.9 ± 1.7kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B,M
Δr50.2 ± 2.9kJ/molN/AMarkovich, Perera, et al., 1996gas phase; B
Δr44.35kJ/molTDAsYamdagni and Kebarle, 1972gas phase; B,M
Quantity Value Units Method Reference Comment
Δr82.0J/mol*KPHPMSHiraoka, Mizuse, et al., 1988gas phase; M
Δr84.1J/mol*KPHPMSYamdagni and Kebarle, 1972gas phase; M
Quantity Value Units Method Reference Comment
Δr22. ± 5.4kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B
Δr19.2kJ/molTDAsYamdagni and Kebarle, 1972gas phase; B

(Chlorine anion • Acetonitrile) + Acetonitrile = (Chlorine anion • 2Acetonitrile)

By formula: (Cl- • C2H3N) + C2H3N = (Cl- • 2C2H3N)

Quantity Value Units Method Reference Comment
Δr52.3 ± 1.7kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B,M
Δr50.2 ± 2.9kJ/molN/AMarkovich, Perera, et al., 1996gas phase; B
Δr51.04kJ/molTDAsYamdagni and Kebarle, 1972gas phase; B,M
Quantity Value Units Method Reference Comment
Δr68.2J/mol*KPHPMSHiraoka, Mizuse, et al., 1988gas phase; M
Δr79.1J/mol*KPHPMSYamdagni and Kebarle, 1972gas phase; M
Quantity Value Units Method Reference Comment
Δr32. ± 5.0kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B
Δr27.6kJ/molTDAsYamdagni and Kebarle, 1972gas phase; B

(Iodide • 2Acetonitrile) + Acetonitrile = (Iodide • 3Acetonitrile)

By formula: (I- • 2C2H3N) + C2H3N = (I- • 3C2H3N)

Quantity Value Units Method Reference Comment
Δr38.5 ± 0.84kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B,M
Δr40.6 ± 2.9kJ/molN/AMarkovich, Perera, et al., 1996gas phase; B
Δr38.9kJ/molTDAsYamdagni and Kebarle, 1972gas phase; B,M
Quantity Value Units Method Reference Comment
Δr83.3J/mol*KPHPMSHiraoka, Mizuse, et al., 1988gas phase; M
Δr92.5J/mol*KPHPMSYamdagni and Kebarle, 1972gas phase; M
Quantity Value Units Method Reference Comment
Δr13.4 ± 3.3kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B
Δr11.3kJ/molTDAsYamdagni and Kebarle, 1972gas phase; B

(Bromine anion • 2Acetonitrile) + Acetonitrile = (Bromine anion • 3Acetonitrile)

By formula: (Br- • 2C2H3N) + C2H3N = (Br- • 3C2H3N)

Quantity Value Units Method Reference Comment
Δr38.5 ± 1.7kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B,M
Δr43.5 ± 2.9kJ/molN/AMarkovich, Perera, et al., 1996gas phase; B
Δr41.84kJ/molTDAsYamdagni and Kebarle, 1972gas phase; B,M
Quantity Value Units Method Reference Comment
Δr69.9J/mol*KPHPMSHiraoka, Mizuse, et al., 1988gas phase; M
Δr90.8J/mol*KHPMSYamdagni and Kebarle, 1972gas phase; M
Quantity Value Units Method Reference Comment
Δr18. ± 5.4kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B
Δr15.1kJ/molTDAsYamdagni and Kebarle, 1972gas phase; B

(Bromine anion • Acetonitrile) + Acetonitrile = (Bromine anion • 2Acetonitrile)

By formula: (Br- • C2H3N) + C2H3N = (Br- • 2C2H3N)

Quantity Value Units Method Reference Comment
Δr49.0 ± 1.7kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B,M
Δr48.1 ± 2.9kJ/molN/AMarkovich, Perera, et al., 1996gas phase; B
Δr49.37kJ/molTDAsYamdagni and Kebarle, 1972gas phase; B,M
Quantity Value Units Method Reference Comment
Δr71.1J/mol*KPHPMSHiraoka, Mizuse, et al., 1988gas phase; M
Δr85.4J/mol*KHPMSYamdagni and Kebarle, 1972gas phase; M
Quantity Value Units Method Reference Comment
Δr28. ± 5.4kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B
Δr24.3kJ/molTDAsYamdagni and Kebarle, 1972gas phase; B

(Fluorine anion • 4Acetonitrile) + Acetonitrile = (Fluorine anion • 5Acetonitrile)

By formula: (F- • 4C2H3N) + C2H3N = (F- • 5C2H3N)

Quantity Value Units Method Reference Comment
Δr48.12 ± 0.84kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B,M
Δr22.2kJ/molTDAsYamdagni and Kebarle, 1972gas phase; B,M
Quantity Value Units Method Reference Comment
Δr124.J/mol*KPHPMSHiraoka, Mizuse, et al., 1988gas phase; M
Δr31.J/mol*KPHPMSYamdagni and Kebarle, 1972gas phase; Entropy change is questionable; M
Quantity Value Units Method Reference Comment
Δr10.9 ± 3.3kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B
Δr13.0kJ/molTDAsYamdagni and Kebarle, 1972gas phase; B

(Fluorine anion • 2Acetonitrile) + Acetonitrile = (Fluorine anion • 3Acetonitrile)

By formula: (F- • 2C2H3N) + C2H3N = (F- • 3C2H3N)

Quantity Value Units Method Reference Comment
Δr63.2 ± 4.2kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B,M
Δr48.95kJ/molTDAsYamdagni and Kebarle, 1972gas phase; B,M
Quantity Value Units Method Reference Comment
Δr93.7J/mol*KPHPMSHiraoka, Mizuse, et al., 1988gas phase; M
Δr74.9J/mol*KPHPMSYamdagni and Kebarle, 1972gas phase; Entropy change is questionable; M
Quantity Value Units Method Reference Comment
Δr35. ± 10.kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B
Δr26.8kJ/molTDAsYamdagni and Kebarle, 1972gas phase; B

(Fluorine anion • Acetonitrile) + Acetonitrile = (Fluorine anion • 2Acetonitrile)

By formula: (F- • C2H3N) + C2H3N = (F- • 2C2H3N)

Quantity Value Units Method Reference Comment
Δr74.1 ± 6.3kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B,M
Δr53.97kJ/molTDAsYamdagni and Kebarle, 1972gas phase; B,M
Quantity Value Units Method Reference Comment
Δr95.8J/mol*KPHPMSHiraoka, Mizuse, et al., 1988gas phase; M
Δr61.9J/mol*KPHPMSYamdagni and Kebarle, 1972gas phase; Entropy change is questionable; M
Quantity Value Units Method Reference Comment
Δr45. ± 14.kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B
Δr35.6kJ/molTDAsYamdagni and Kebarle, 1972gas phase; B

(Fluorine anion • 3Acetonitrile) + Acetonitrile = (Fluorine anion • 4Acetonitrile)

By formula: (F- • 3C2H3N) + C2H3N = (F- • 4C2H3N)

Quantity Value Units Method Reference Comment
Δr53.6 ± 2.1kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B,M
Δr43.51kJ/molTDAsYamdagni and Kebarle, 1972gas phase; B,M
Quantity Value Units Method Reference Comment
Δr110.J/mol*KPHPMSHiraoka, Mizuse, et al., 1988gas phase; M
Δr82.0J/mol*KPHPMSYamdagni and Kebarle, 1972gas phase; M
Quantity Value Units Method Reference Comment
Δr21. ± 7.9kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B
Δr18.8kJ/molTDAsYamdagni and Kebarle, 1972gas phase; B

C3H9Sn+ + Acetonitrile = (C3H9Sn+ • Acetonitrile)

By formula: C3H9Sn+ + C2H3N = (C3H9Sn+ • C2H3N)

Quantity Value Units Method Reference Comment
Δr157.kJ/molPHPMSStone and Splinter, 1984gas phase; switching reaction((CH3)3Sn+)CH3OH, Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
Δr131.J/mol*KN/AStone and Splinter, 1984gas phase; switching reaction((CH3)3Sn+)CH3OH, Entropy change calculated or estimated; M

Free energy of reaction

ΔrG° (kJ/mol) T (K) Method Reference Comment
87.9525.PHPMSStone and Splinter, 1984gas phase; switching reaction((CH3)3Sn+)CH3OH, Entropy change calculated or estimated; M

(C2H4N+ • Water • 2Acetonitrile) + Water = (C2H4N+ • 2Water • 2Acetonitrile)

By formula: (C2H4N+ • H2O • 2C2H3N) + H2O = (C2H4N+ • 2H2O • 2C2H3N)

Bond type: Hydrogen bond (positive ion to hydride)

Quantity Value Units Method Reference Comment
Δr41.kJ/molPHPMSDeakyne, Meot-Ner (Mautner), et al., 1986gas phase; n, Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
Δr92.J/mol*KN/ADeakyne, Meot-Ner (Mautner), et al., 1986gas phase; n, Entropy change calculated or estimated; M

Free energy of reaction

ΔrG° (kJ/mol) T (K) Method Reference Comment
12.316.PHPMSDeakyne, Meot-Ner (Mautner), et al., 1986gas phase; n, Entropy change calculated or estimated; M

C2H2N- + Acetonitrile = (C2H2N- • Acetonitrile)

By formula: C2H2N- + C2H3N = (C2H2N- • C2H3N)

Quantity Value Units Method Reference Comment
Δr53.6 ± 4.2kJ/molTDAsMeot-ner, 1988, 2gas phase; B,M
Δr65.69kJ/molTDAsHiraoka, Mizure, et al., 1988gas phase; B,M
Quantity Value Units Method Reference Comment
Δr95.4J/mol*KPHPMSHiraoka, Mizure, et al., 1988gas phase; M
Δr56.1J/mol*KPHPMSMeot-ner, 1988, 2gas phase; M
Quantity Value Units Method Reference Comment
Δr37. ± 4.2kJ/molTDAsMeot-ner, 1988, 2gas phase; B
Δr37.2kJ/molTDAsHiraoka, Mizure, et al., 1988gas phase; B

(Chlorine anion • 7Acetonitrile) + Acetonitrile = (Chlorine anion • 8Acetonitrile)

By formula: (Cl- • 7C2H3N) + C2H3N = (Cl- • 8C2H3N)

Quantity Value Units Method Reference Comment
Δr38.5kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; Entropy estimated; B,M
Δr12. ± 5.0kJ/molN/AMarkovich, Perera, et al., 1996gas phase; B
Quantity Value Units Method Reference Comment
Δr130.J/mol*KN/AHiraoka, Mizuse, et al., 1988gas phase; Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
Δr-1.7kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; Entropy estimated; B

(C2H4N+ • Acetonitrile • 4Water) + Acetonitrile = (C2H4N+ • 2Acetonitrile • 4Water)

By formula: (C2H4N+ • C2H3N • 4H2O) + C2H3N = (C2H4N+ • 2C2H3N • 4H2O)

Quantity Value Units Method Reference Comment
Δr60.2kJ/molPHPMSDeakyne, Meot-Ner (Mautner), et al., 1986gas phase; n, Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
Δr92.J/mol*KN/ADeakyne, Meot-Ner (Mautner), et al., 1986gas phase; n, Entropy change calculated or estimated; M

Free energy of reaction

ΔrG° (kJ/mol) T (K) Method Reference Comment
31.318.PHPMSDeakyne, Meot-Ner (Mautner), et al., 1986gas phase; n, Entropy change calculated or estimated; M

(CH6N+ • 2Acetonitrile) + Methanethiol = (CH6N+ • Methanethiol • 2Acetonitrile)

By formula: (CH6N+ • 2C2H3N) + CH4S = (CH6N+ • CH4S • 2C2H3N)

Quantity Value Units Method Reference Comment
Δr33.kJ/molPHPMSMeot-Ner (Mautner) and Sieck, 1985gas phase; Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
Δr84.J/mol*KN/AMeot-Ner (Mautner) and Sieck, 1985gas phase; Entropy change calculated or estimated; M

Free energy of reaction

ΔrG° (kJ/mol) T (K) Method Reference Comment
10.270.PHPMSMeot-Ner (Mautner) and Sieck, 1985gas phase; Entropy change calculated or estimated; M

C11H10+ + Acetonitrile = (C11H10+ • Acetonitrile)

By formula: C11H10+ + C2H3N = (C11H10+ • C2H3N)

Quantity Value Units Method Reference Comment
Δr47.3kJ/molPHPMSEl-Shall and Meot-Ner (Mautner), 1987gas phase; Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
Δr92.J/mol*KN/AEl-Shall and Meot-Ner (Mautner), 1987gas phase; Entropy change calculated or estimated; M

Free energy of reaction

ΔrG° (kJ/mol) T (K) Method Reference Comment
19.303.PHPMSEl-Shall and Meot-Ner (Mautner), 1987gas phase; Entropy change calculated or estimated; M

(Chlorine anion • 6Acetonitrile) + Acetonitrile = (Chlorine anion • 7Acetonitrile)

By formula: (Cl- • 6C2H3N) + C2H3N = (Cl- • 7C2H3N)

Quantity Value Units Method Reference Comment
Δr39.3 ± 1.3kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B,M
Δr16. ± 4.6kJ/molN/AMarkovich, Perera, et al., 1996gas phase; B
Quantity Value Units Method Reference Comment
Δr128.J/mol*KPHPMSHiraoka, Mizuse, et al., 1988gas phase; M
Quantity Value Units Method Reference Comment
Δr0.8 ± 5.9kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B

(Chlorine anion • 4Acetonitrile) + Acetonitrile = (Chlorine anion • 5Acetonitrile)

By formula: (Cl- • 4C2H3N) + C2H3N = (Cl- • 5C2H3N)

Quantity Value Units Method Reference Comment
Δr41.0 ± 0.84kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B,M
Δr24.3 ± 3.8kJ/molN/AMarkovich, Perera, et al., 1996gas phase; B
Quantity Value Units Method Reference Comment
Δr113.J/mol*KPHPMSHiraoka, Mizuse, et al., 1988gas phase; M
Quantity Value Units Method Reference Comment
Δr7.1 ± 3.3kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B

(Iodide • 3Acetonitrile) + Acetonitrile = (Iodide • 4Acetonitrile)

By formula: (I- • 3C2H3N) + C2H3N = (I- • 4C2H3N)

Quantity Value Units Method Reference Comment
Δr32.6 ± 0.42kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B,M
Δr31.0 ± 3.3kJ/molN/AMarkovich, Perera, et al., 1996gas phase; B
Quantity Value Units Method Reference Comment
Δr80.8J/mol*KPHPMSHiraoka, Mizuse, et al., 1988gas phase; M
Quantity Value Units Method Reference Comment
Δr8.4 ± 1.7kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B

(Iodide • 4Acetonitrile) + Acetonitrile = (Iodide • 5Acetonitrile)

By formula: (I- • 4C2H3N) + C2H3N = (I- • 5C2H3N)

Quantity Value Units Method Reference Comment
Δr29.7 ± 1.3kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B,M
Δr44.4 ± 3.8kJ/molN/AMarkovich, Perera, et al., 1996gas phase; B
Quantity Value Units Method Reference Comment
Δr79.1J/mol*KPHPMSHiraoka, Mizuse, et al., 1988gas phase; M
Quantity Value Units Method Reference Comment
Δr5.9 ± 5.9kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B

(Chlorine anion • 5Acetonitrile) + Acetonitrile = (Chlorine anion • 6Acetonitrile)

By formula: (Cl- • 5C2H3N) + C2H3N = (Cl- • 6C2H3N)

Quantity Value Units Method Reference Comment
Δr39.7 ± 0.84kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B,M
Δr24. ± 4.2kJ/molN/AMarkovich, Perera, et al., 1996gas phase; B
Quantity Value Units Method Reference Comment
Δr122.J/mol*KPHPMSHiraoka, Mizuse, et al., 1988gas phase; M
Quantity Value Units Method Reference Comment
Δr3.3 ± 3.3kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B

(Bromine anion • 4Acetonitrile) + Acetonitrile = (Bromine anion • 5Acetonitrile)

By formula: (Br- • 4C2H3N) + C2H3N = (Br- • 5C2H3N)

Quantity Value Units Method Reference Comment
Δr35.6 ± 1.3kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B,M
Δr24.3 ± 3.8kJ/molN/AMarkovich, Perera, et al., 1996gas phase; B
Quantity Value Units Method Reference Comment
Δr92.9J/mol*KPHPMSHiraoka, Mizuse, et al., 1988gas phase; M
Quantity Value Units Method Reference Comment
Δr7.5 ± 5.4kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B

(Bromine anion • 5Acetonitrile) + Acetonitrile = (Bromine anion • 6Acetonitrile)

By formula: (Br- • 5C2H3N) + C2H3N = (Br- • 6C2H3N)

Quantity Value Units Method Reference Comment
Δr33.5 ± 0.84kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B,M
Δr23. ± 4.2kJ/molN/AMarkovich, Perera, et al., 1996gas phase; B
Quantity Value Units Method Reference Comment
Δr94.1J/mol*KPHPMSHiraoka, Mizuse, et al., 1988gas phase; M
Quantity Value Units Method Reference Comment
Δr5.0 ± 3.8kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B

(Bromine anion • 6Acetonitrile) + Acetonitrile = (Bromine anion • 7Acetonitrile)

By formula: (Br- • 6C2H3N) + C2H3N = (Br- • 7C2H3N)

Quantity Value Units Method Reference Comment
Δr32.2 ± 1.3kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B,M
Δr13. ± 4.6kJ/molN/AMarkovich, Perera, et al., 1996gas phase; B
Quantity Value Units Method Reference Comment
Δr95.8J/mol*KPHPMSHiraoka, Mizuse, et al., 1988gas phase; M
Quantity Value Units Method Reference Comment
Δr3. ± 5.4kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B

(Fluorine anion • 6Acetonitrile) + Acetonitrile = (Fluorine anion • 7Acetonitrile)

By formula: (F- • 6C2H3N) + C2H3N = (F- • 7C2H3N)

Quantity Value Units Method Reference Comment
Δr35.6kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; Entropy estimated; B,M
Quantity Value Units Method Reference Comment
Δr120.J/mol*KN/AHiraoka, Mizuse, et al., 1988gas phase; Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
Δr0.42kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; Entropy estimated; B

C9H9N3O3W (cr) = 0.5Tungsten hexacarbonyl (g) + 0.5tungsten (cr) + 3Acetonitrile (g)

By formula: C9H9N3O3W (cr) = 0.5C6O6W (g) + 0.5W (cr) + 3C2H3N (g)

Quantity Value Units Method Reference Comment
Δr195.kJ/molTD-HFCAdedeji, Connor, et al., 1978The value for the reaction enthalpy corresponds to the thermal decomposition experiments and leads to -415. kJ/mol for the enthalpy of formation of W(CO)3(MeCN)3(cr). The value -405.0±12.0 was recommended by the authors Adedeji, Connor, et al., 1978; MS

C7H4N2O2- + Acetonitrile = (C7H4N2O2- • Acetonitrile)

By formula: C7H4N2O2- + C2H3N = (C7H4N2O2- • C2H3N)

Quantity Value Units Method Reference Comment
Δr58.2 ± 8.4kJ/molN/AChowdhury, Grimsrud, et al., 1987gas phase; Free energy affinity at 70°C.; B,M
Quantity Value Units Method Reference Comment
Δr120.J/mol*KPHPMSChowdhury, 1987gas phase; M
Quantity Value Units Method Reference Comment
Δr17. ± 8.4kJ/molTDAsChowdhury, Grimsrud, et al., 1987gas phase; Free energy affinity at 70°C.; B

C7H7NO3- + Acetonitrile = (C7H7NO3- • Acetonitrile)

By formula: C7H7NO3- + C2H3N = (C7H7NO3- • C2H3N)

Quantity Value Units Method Reference Comment
Δr57.7 ± 8.4kJ/molN/AChowdhury, Grimsrud, et al., 1987gas phase; Free energy affinity at 70°C.; B,M
Quantity Value Units Method Reference Comment
Δr95.0J/mol*KPHPMSChowdhury, 1987gas phase; M
Quantity Value Units Method Reference Comment
Δr28. ± 8.4kJ/molTDAsChowdhury, Grimsrud, et al., 1987gas phase; Free energy affinity at 70°C.; B

(Sodium ion (1+) • 4Acetonitrile) + Acetonitrile = (Sodium ion (1+) • 5Acetonitrile)

By formula: (Na+ • 4C2H3N) + C2H3N = (Na+ • 5C2H3N)

Quantity Value Units Method Reference Comment
Δr53. ± 3.kJ/molCIDTValina, 2001CH3CN is fifth ligand; RCD
Δr53.1kJ/molHPMSDavidson and Kebarle, 1976gas phase; Entropy change is questionable; M
Quantity Value Units Method Reference Comment
Δr172.J/mol*KHPMSDavidson and Kebarle, 1976gas phase; Entropy change is questionable; M

C7H4F3NO2- + Acetonitrile = (C7H4F3NO2- • Acetonitrile)

By formula: C7H4F3NO2- + C2H3N = (C7H4F3NO2- • C2H3N)

Quantity Value Units Method Reference Comment
Δr55.6 ± 8.4kJ/molN/AChowdhury, Grimsrud, et al., 1987gas phase; Free energy affinity at 70°C.; B,M
Quantity Value Units Method Reference Comment
Δr97.9J/mol*KPHPMSChowdhury, 1987gas phase; M
Quantity Value Units Method Reference Comment
Δr23. ± 8.4kJ/molTDAsChowdhury, Grimsrud, et al., 1987gas phase; Free energy affinity at 70°C.; B

(Oxygen anion • 2Acetonitrile) + Acetonitrile = (Oxygen anion • 3Acetonitrile)

By formula: (O2- • 2C2H3N) + C2H3N = (O2- • 3C2H3N)

Quantity Value Units Method Reference Comment
Δr49.8 ± 2.5kJ/molTDAsYamdagni, Payzant, et al., 1973gas phase; B,M
Quantity Value Units Method Reference Comment
Δr103.J/mol*KPHPMSYamdagni, Payzant, et al., 1973gas phase; M
Quantity Value Units Method Reference Comment
Δr18.8 ± 0.84kJ/molTDAsYamdagni, Payzant, et al., 1973gas phase; B

(Oxygen anion • 3Acetonitrile) + Acetonitrile = (Oxygen anion • 4Acetonitrile)

By formula: (O2- • 3C2H3N) + C2H3N = (O2- • 4C2H3N)

Quantity Value Units Method Reference Comment
Δr39.7 ± 2.1kJ/molTDAsYamdagni, Payzant, et al., 1973gas phase; B,M
Quantity Value Units Method Reference Comment
Δr93.7J/mol*KPHPMSYamdagni, Payzant, et al., 1973gas phase; M
Quantity Value Units Method Reference Comment
Δr11.7 ± 0.42kJ/molTDAsYamdagni, Payzant, et al., 1973gas phase; B

(Oxygen anion • Acetonitrile) + Acetonitrile = (Oxygen anion • 2Acetonitrile)

By formula: (O2- • C2H3N) + C2H3N = (O2- • 2C2H3N)

Quantity Value Units Method Reference Comment
Δr59.4 ± 2.9kJ/molTDAsYamdagni, Payzant, et al., 1973gas phase; B,M
Quantity Value Units Method Reference Comment
Δr92.0J/mol*KPHPMSYamdagni, Payzant, et al., 1973gas phase; M
Quantity Value Units Method Reference Comment
Δr32.2 ± 1.7kJ/molTDAsYamdagni, Payzant, et al., 1973gas phase; B

(Fluorine anion • 5Acetonitrile) + Acetonitrile = (Fluorine anion • 6Acetonitrile)

By formula: (F- • 5C2H3N) + C2H3N = (F- • 6C2H3N)

Quantity Value Units Method Reference Comment
Δr40.6 ± 0.84kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B,M
Quantity Value Units Method Reference Comment
Δr116.J/mol*KPHPMSHiraoka, Mizuse, et al., 1988gas phase; M
Quantity Value Units Method Reference Comment
Δr5.9 ± 3.8kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B

Nitrogen oxide anion + Acetonitrile = (Nitrogen oxide anion • Acetonitrile)

By formula: NO2- + C2H3N = (NO2- • C2H3N)

Quantity Value Units Method Reference Comment
Δr56.07 ± 0.42kJ/molTDAsSieck, 1985gas phase; B,M
Quantity Value Units Method Reference Comment
Δr64.0J/mol*KPHPMSSieck, 1985gas phase; M
Quantity Value Units Method Reference Comment
Δr36.8 ± 0.84kJ/molTDAsSieck, 1985gas phase; B

(C2H4N+ • 2Water • Acetonitrile) + Water = (C2H4N+ • 3Water • Acetonitrile)

By formula: (C2H4N+ • 2H2O • C2H3N) + H2O = (C2H4N+ • 3H2O • C2H3N)

Bond type: Hydrogen bond (positive ion to hydride)

Quantity Value Units Method Reference Comment
Δr43.1kJ/molPHPMSDeakyne, Meot-Ner (Mautner), et al., 1986gas phase; n; M
Quantity Value Units Method Reference Comment
Δr93.3J/mol*KPHPMSDeakyne, Meot-Ner (Mautner), et al., 1986gas phase; n; M

Oxygen anion + Acetonitrile = (Oxygen anion • Acetonitrile)

By formula: O2- + C2H3N = (O2- • C2H3N)

Quantity Value Units Method Reference Comment
Δr68.62kJ/molTDAsYamdagni, Payzant, et al., 1973gas phase; B,M
Quantity Value Units Method Reference Comment
Δr72.8J/mol*KPHPMSYamdagni, Payzant, et al., 1973gas phase; M
Quantity Value Units Method Reference Comment
Δr46.86kJ/molTDAsYamdagni, Payzant, et al., 1973gas phase; B

(C2H4N+ • Water • Acetonitrile) + Water = (C2H4N+ • 2Water • Acetonitrile)

By formula: (C2H4N+ • H2O • C2H3N) + H2O = (C2H4N+ • 2H2O • C2H3N)

Bond type: Hydrogen bond (positive ion to hydride)

Quantity Value Units Method Reference Comment
Δr64.0kJ/molPHPMSDeakyne, Meot-Ner (Mautner), et al., 1986gas phase; n; M
Quantity Value Units Method Reference Comment
Δr105.J/mol*KPHPMSDeakyne, Meot-Ner (Mautner), et al., 1986gas phase; n; M

pyrrolide anion + Acetonitrile = (pyrrolide anion • Acetonitrile)

By formula: C4H4N- + C2H3N = (C4H4N- • C2H3N)

Quantity Value Units Method Reference Comment
Δr66.1 ± 4.2kJ/molTDAsMeot-ner, 1988, 2gas phase; B,M
Quantity Value Units Method Reference Comment
Δr97.9J/mol*KPHPMSMeot-ner, 1988, 2gas phase; M
Quantity Value Units Method Reference Comment
Δr37. ± 4.2kJ/molTDAsMeot-ner, 1988, 2gas phase; B

(C2H4N+ • Methyl Alcohol • Acetonitrile) + Methyl Alcohol = (C2H4N+ • 2Methyl Alcohol • Acetonitrile)

By formula: (C2H4N+ • CH4O • C2H3N) + CH4O = (C2H4N+ • 2CH4O • C2H3N)

Bond type: Hydrogen bonds of the type NH+-O between organics

Quantity Value Units Method Reference Comment
Δr57.3kJ/molPHPMSEl-Shall, Olafsdottir, et al., 1991gas phase; M
Quantity Value Units Method Reference Comment
Δr101.J/mol*KPHPMSEl-Shall, Olafsdottir, et al., 1991gas phase; M

Gas phase ion energetics data

Go To: Top, Gas phase thermochemistry data, 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 evaluated as indicated in comments:
HL - Edward P. Hunter and Sharon G. Lias
L - Sharon G. Lias

Data compiled as indicated in comments:
B - John E. Bartmess
MM - Michael M. Meot-Ner (Mautner)
LL - Sharon G. Lias and Joel F. Liebman
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron

View reactions leading to C2H3N+ (ion structure unspecified)

Quantity Value Units Method Reference Comment
IE (evaluated)12.20 ± 0.01eVN/AN/AL
Quantity Value Units Method Reference Comment
Proton affinity (review)779.2kJ/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity748.kJ/molN/AHunter and Lias, 1998HL

Electron affinity determinations

EA (eV) Method Reference Comment
0.01101EFDSuess, Liu, et al., 2003B
0.0030 ± 0.0072LPESBailey, Dessent, et al., 1996B
0.01149EFDDesfrancois, Abdoul-Carime, et al., 1994EA: 11.5 meV. Dipole-bound state.; B

Proton affinity at 298K

Proton affinity (kJ/mol) Reference Comment
787.4 ± 5.9Williams, Denault, et al., 2001T = T(eff) = 498-797 KK; propionitrile, butyronitrile, valeronitrile reference compounds; MM

Ionization energy determinations

IE (eV) Method Reference Comment
12.201 ± 0.002PEGochel-Dupuis, Delwiche, et al., 1992LL
12.38 ± 0.04EIHarland and McIntosh, 1985LBLHLM
12.3 ± 0.25EIChess, Lapp, et al., 1982LBLHLM
12.33 ± 0.08EIAllam, Migahed, et al., 1982LBLHLM
12.194 ± 0.005PIRider, Ray, et al., 1981LLK
12.21PEKimura, Katsumata, et al., 1981LLK
12.20 ± 0.01PEStaley, Kleckner, et al., 1976LLK
13.14PELake and Thompson, 1970RDSH
15.11PELake and Thompson, 1970RDSH
12.12PEFrost, Herring, et al., 1970RDSH
13.11PEFrost, Herring, et al., 1970RDSH
15.12PEFrost, Herring, et al., 1970RDSH
16.98PEFrost, Herring, et al., 1970RDSH
12.19 ± 0.01PIDibeler and Liston, 1968RDSH
12.23 ± 0.05EIFranklin, Wada, et al., 1966RDSH
12.205 ± 0.004PINicholson, 1965RDSH
12.22 ± 0.01PIWatanabe, Nakayama, et al., 1962RDSH
12.46PEAsbrink, Von Niessen, et al., 1980Vertical value; LLK
12.20PELake and Thompson, 1970Vertical value; RDSH

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
C+27.0 ± 0.3?EIReed and Snedden, 1956RDSH
CH+22.4 ± 0.2?EIReed and Snedden, 1956RDSH
CH2+15.7HCNEIHaney and Franklin, 1968RDSH
CH2+14.94 ± 0.02HCNPIDibeler and Liston, 1968RDSH
C2HN+15.90 ± 0.08?EIHarland and McIntosh, 1985LBLHLM
C2HN+15.1 ± 0.1H2PIDibeler and Liston, 1968RDSH
C2H2N+13.94 ± 0.02HN/AHolmes, Lossing, et al., 1993LL
C2H2N+14.38 ± 0.04HEIHarland and McIntosh, 1985LBLHLM
C2H2N+14.75 ± 0.08HEIAllam, Migahed, et al., 1982LBLHLM
C2H2N+14.01 ± 0.02HPIDibeler and Liston, 1968RDSH
C2H2N+13.54 ± 0.08HEIFranklin, Wada, et al., 1966RDSH
C2H2N+14.28 ± 0.05HEIPottie and Lossing, 1961RDSH
C2N+20.00 ± 0.08?EIHarland and McIntosh, 1985LBLHLM

De-protonation reactions

C2H2N- + Hydrogen cation = Acetonitrile

By formula: C2H2N- + H+ = C2H3N

Quantity Value Units Method Reference Comment
Δr1560. ± 8.8kJ/molG+TSBartmess, Scott, et al., 1979gas phase; value altered from reference due to change in acidity scale; B
Δr1544. ± 19.kJ/molCIDTGraul and Squires, 1990gas phase; B
Δr1562. ± 11.kJ/molG+TSCumming and Kebarle, 1978gas phase; B
Δr1568. ± 8.4kJ/molD-EAZimmerman and Brauman, 1977gas phase; B
Δr1534. ± 19.kJ/molEIAEHeni and Illenberger, 1986gas phase; From MeCN; B
Quantity Value Units Method Reference Comment
Δr1528. ± 8.4kJ/molIMREBartmess, Scott, et al., 1979gas phase; value altered from reference due to change in acidity scale; B
Δr1530. ± 8.4kJ/molIMRECumming and Kebarle, 1978gas phase; B
Δr1536. ± 8.8kJ/molH-TSZimmerman and Brauman, 1977gas phase; B

References

Go To: Top, Gas phase thermochemistry data, 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.

An and Mansson, 1983
An, X.; Mansson, M., Enthalpies of combustion and formation of acetontrile, J. Chem. Thermodyn., 1983, 15, 287-293. [all data]

Hall and Baldt, 1971
Hall, H.K., Jr.; Baldt, J.H., Thermochemistry of strained-ring bridgehead nitriles and esters, J. Am. Chem. Soc., 1971, 93, 140-145. [all data]

Hiraoka, Mizuse, et al., 1988
Hiraoka, K.; Mizuse, S.; Yamabe, S., Solvation of Halide Ions with H2O and CH3CN in the Gas Phase, J. Phys. Chem., 1988, 92, 13, 3943, https://doi.org/10.1021/j100324a051 . [all data]

Yamabe, Furumiya, et al., 1986
Yamabe, S.; Furumiya, Y.; Hiraoka, K.; Morise, K., Theoretical Van't Hoff plots of gas phase ion equilibria of Cl- ion in water, methanol and acetonitrile, Chem. Phys. Lett., 1986, 131, 261. [all data]

Sieck, 1985
Sieck, L.W., Thermochemistry of Solvation of NO2- and C6H5NO2- by Polar Molecules in the Vapor Phase. Comparison with Cl- and Variation with Ligand Structure., J. Phys. Chem., 1985, 89, 25, 5552, https://doi.org/10.1021/j100271a049 . [all data]

Yamdagni and Kebarle, 1972
Yamdagni, R.; Kebarle, P., Solvation of negative ions by protic and aprotic solvents. Gas phase solvation of halide ions by acetonitrile and water molecules, J. Am. Chem. Soc., 1972, 94, 2940. [all data]

Larson and McMahon, 1984
Larson, J.W.; McMahon, T.B., Hydrogen bonding in gas phase anions. An experimental investigation of the interaction between chloride ion and bronsted acids from ICR chloride exchange equilibria, J. Am. Chem. Soc., 1984, 106, 517. [all data]

Larson and McMahon, 1984, 2
Larson, J.W.; McMahon, T.B., Gas phase negative ion chemistry of alkylchloroformates, Can. J. Chem., 1984, 62, 675. [all data]

Li, Ross, et al., 1996
Li, C.; Ross, P.; Szulejko, J.; McMahon, T.B., High-Pressure Mass Spectrometric Investigations of the Potential Energy Surfaces of Gas-Phase Sn2 Reactions., J. Am. Chem. Soc., 1996, 118, 39, 9360, https://doi.org/10.1021/ja960565o . [all data]

Markovich, Perera, et al., 1996
Markovich, G.; Perera, L.; Berkowitz, M.L.; Cheshnovsky, O., The Solvation of Cl-, Br-, and I- in Acetonitrile Cluster: Photoelectron Spectroscopy and Molecular Dynamics Simulations., J. Chem. Phys., 1996, 105, 7, 2675, https://doi.org/10.1063/1.472131 . [all data]

Caldwell, Masucci, et al., 1989
Caldwell, G.W.; Masucci, J.A.; Ikonomou, M.G., Negative Ion Chemical Ionization Mass Spectrometry - Binding of Molecules to Bromide and Iodide Anions, Org. Mass Spectrom., 1989, 24, 1, 8, https://doi.org/10.1002/oms.1210240103 . [all data]

Tanabe, Morgon, et al., 1996
Tanabe, F.K.J.; Morgon, N.H.; Riveros, J.M., Relative Bromide and Iodide Affinity of Simple Solvent Molecules Determined by FT-ICR, J. Phys. Chem., 1996, 100, 8, 2862-2866, https://doi.org/10.1021/jp952290p . [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]

Dessent, Bailey, et al., 1995
Dessent, C.E.H.; Bailey, C.G.; Johnson, M.A., Dipole-bound excited states of the I-center dot CH3CN and I-center dot(CH3CN)2 ion-molecule complexes: Evidence for asymmetric solvation, J. Chem. Phys., 1995, 103, 6, 2006, https://doi.org/10.1063/1.469727 . [all data]

Caldwell and Kebarle, 1984
Caldwell, G.; Kebarle, P., Binding energies and structural effects in halide anion-ROH and -RCOOH complexes from gas phase equilibria measurements, J. Am. Chem. Soc., 1984, 106, 967. [all data]

Meot-ner, 1988
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]

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]

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]

Graul and Squires, 1990
Graul, S.T.; Squires, R.R., Gas-Phase Acidities Derived from Threshold Energies for Activated Reactions, J. Am. Chem. Soc., 1990, 112, 7, 2517, https://doi.org/10.1021/ja00163a007 . [all data]

Cumming and Kebarle, 1978
Cumming, J.B.; Kebarle, P., Summary of gas phase measurements involving acids AH. Entropy changes in proton transfer reactions involving negative ions. Bond dissociation energies D(A-H) and electron affinities EA(A), Can. J. Chem., 1978, 56, 1. [all data]

Zimmerman and Brauman, 1977
Zimmerman, A.H.; Brauman, J.I., Electron photodetachment from negative ions of C2v symmetry. Electron affinities of allyl and cyanomethyl radicals, J. Am. Chem. Soc., 1977, 99, 3565. [all data]

Heni and Illenberger, 1986
Heni, M.; Illenberger, E., Electron attachment by saturated nitriles. Acrylonitrile (CH2H3CN), and benzonitrile (C6H5CN), Int. J. Mass Spectrom. Ion Phys., 1986, 73, 127. [all data]

Honma, Sunderlin, et al., 1993
Honma, K.; Sunderlin, L.S.; Armentrout, P.B., Guided-Ion Beam Studies of the Reactions of Protonated Water Clusters, H(H2O)n+ (n = 1-4), with Acetonitrile, J. Chem. Phys., 1993, 99, 3, 1623, https://doi.org/10.1063/1.465331 . [all data]

Allison, Cramer, et al., 1991
Allison, C.E.; Cramer, J.A.; Hop, C.E.C.A.; Szulejko, J.E.; McMahon, T.B., Strong Hydrogen Bonding in Gas - Phase Ions. A High - Pressure Mass Spectrometric Study of the Proton Affinity, Proton Transfer Kinetics, and Hydrogen - Bonding Capability of Iron Pentacarbonyl, J. Am. Chem. Soc., 1991, 113, 12, 4469, https://doi.org/10.1021/ja00012a014 . [all data]

Deakyne, Meot-Ner (Mautner), et al., 1986
Deakyne, C.A.; Meot-Ner (Mautner), M.; Campbell, C.L.; Hughes, M.G.; Murphy, S.P., Multicomponent Cluster Ions. 1. The Acetonitrile - Water System, J. Chem. Phys., 1986, 90, 4648. [all data]

Speller and Meot-Ner (Mautner), 1985
Speller, C.V.; Meot-Ner (Mautner), M., The Ionic Hydrogen Bond and Ion Solvation. 3. Bonds Involving Cyanides. Correlations with Proton Affinites, J. Phys. Chem., 1985, 81, 24, 5217, https://doi.org/10.1021/j100270a020 . [all data]

Meot-Ner (Mautner), 1978
Meot-Ner (Mautner), M., Solvation of the Proton by HCN and CH3CN. Condensation of HCN with Ions in the Gas Phase., J. Am. Chem. Soc., 1978, 100, 15, 4694, https://doi.org/10.1021/ja00483a012 . [all data]

Stone and Splinter, 1984
Stone, J.A.; Splinter, D.E., A high-pressure mass spectrometric study of the binding of (CH3)3Sn+ to lewis bases in the gas phase, Int. J. Mass Spectrom. Ion Processes, 1984, 59, 169. [all data]

Meot-ner, 1988, 2
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]

Meot-Ner (Mautner) and Sieck, 1985
Meot-Ner (Mautner), M.; Sieck, L.W., The Ionic Hydrogen Bond and Ion Solvation. 4. SH+ O and NH+ S Bonds. Correlations with Proton Affinity. Mutual Effects of Weak and Strong Ligands in Mixed Clusters, J. Phys. Chem., 1985, 89, 24, 5222, https://doi.org/10.1021/j100270a021 . [all data]

El-Shall and Meot-Ner (Mautner), 1987
El-Shall, M.S.; Meot-Ner (Mautner), M., Ionic Charge Transfer Complexes. 3. Delocalised pi Systems as Electron Acceptors and Donors, J. Phys. Chem., 1987, 91, 5, 1088, https://doi.org/10.1021/j100289a017 . [all data]

Adedeji, Connor, et al., 1978
Adedeji, F.A.; Connor, J.A.; Demain, C.P.; Martinho Simões, J.A.; Skinner, H.A.; Zafarani- Moattar, M.T., J. Organometal. Chem., 1978, 149, 333. [all data]

Chowdhury, Grimsrud, et al., 1987
Chowdhury, S.; Grimsrud, E.P.; Kebarle, P., Bonding of Charged Delocalized Anions to Protic and Dipolar Aprotic Solvent Molecules, J. Phys. Chem., 1987, 91, 10, 2551, https://doi.org/10.1021/j100294a021 . [all data]

Chowdhury, 1987
Chowdhury, S. Grimsrud, Bonding of Charge Delocalized Anions to Protic and Dipolar Aprotic Solvents, J. Phys. Chem., 1987, 91, 10, 2551, https://doi.org/10.1021/j100294a021 . [all data]

Valina, 2001
Valina, A.B., Collision-Induced Dissociation and Theoretical Studies of Na+-Acetonitrile Complexes, J. Phys. Chem. A, 2001, 105, 49, 11057, https://doi.org/10.1021/jp0128123 . [all data]

Davidson and Kebarle, 1976
Davidson, W.R.; Kebarle, P., Ionic Solvation by Aprotic Solvents. Gas Phase Solvation of the Alkali Ions by Acetonitrile, J. Am. Chem. Soc., 1976, 98, 20, 6125, https://doi.org/10.1021/ja00436a010 . [all data]

Yamdagni, Payzant, et al., 1973
Yamdagni, R.; Payzant, J.D.; Kebarle, P., Solvation of Cl- and O2- with H2O, CH3OH, and CH3CN in the gas phase, Can. J. Chem., 1973, 51, 2507. [all data]

El-Shall, Olafsdottir, et al., 1991
El-Shall, M.S.; Olafsdottir, S.; Meot-ner (Mautner), M.; Sieck, L.W., Energy effects on cluster ion distributions: Beam expansion and thermochemical studies on mixed clusters of methanol and acetonitrile, Chem. Phys. Lett., 1991, 185, 3-4, 193, https://doi.org/10.1016/S0009-2614(91)85046-Y . [all data]

Hunter and Lias, 1998
Hunter, E.P.; Lias, S.G., Evaluated Gas Phase Basicities and Proton Affinities of Molecules: An Update, J. Phys. Chem. Ref. Data, 1998, 27, 3, 413-656, https://doi.org/10.1063/1.556018 . [all data]

Suess, Liu, et al., 2003
Suess, L.; Liu, Y.; Parthasarathy, R.; Dunning, F.B., Dipole-bound negative ions: Collisional destruction and blackbody-radiation-induced photodetachment, J. Chem. Phys., 2003, 119, 24, 12890-12894, https://doi.org/10.1063/1.1628215 . [all data]

Bailey, Dessent, et al., 1996
Bailey, C.G.; Dessent, C.E.H.; Johnson, M.A.; Bowen, K.A., Jr., Vibronic Effects in the Photon Energy Dependent Photoelectron Spectra of the CH3CN- Dipole-bound Anion, J. Chem. Phys., 1996, 104, 18, 6976, https://doi.org/10.1063/1.471415 . [all data]

Desfrancois, Abdoul-Carime, et al., 1994
Desfrancois, C.; Abdoul-Carime, H.; Khelifa, N.; Schermann, J.P., Fork 1/r to 1/r2 Potentials: Electron Exchange between Rydberg Atoms and Polar Molecules, Phys. Rev. Lett., 1994, 73, 18, 2436, https://doi.org/10.1103/PhysRevLett.73.2436 . [all data]

Williams, Denault, et al., 2001
Williams, T.I.; Denault, J.W.; Cooks, R.G., Proton Affinity of Deuterated Acetonitrile Estimated by the Kinetic Method with Full Entropy Analysis, Int. J. Mass Spectrom., 2001, 210/211, 133. [all data]

Gochel-Dupuis, Delwiche, et al., 1992
Gochel-Dupuis, M.; Delwiche, J.; Hubin-Franskin, M.-J.; Collin, J.E., High-resolution HeI photoelectron spectrum of acetonitrile, Chem. Phys. Lett., 1992, 193, 41. [all data]

Harland and McIntosh, 1985
Harland, P.W.; McIntosh, B.J., Enthalpies of formation for the isomeric ions HxCCN+ and HxCNC+ (x = 0-3) by monochromatic electron impact on C2N2, CH3CN and CH3NC., Int. J. Mass Spectrom. Ion Processes, 1985, 67, 29. [all data]

Chess, Lapp, et al., 1982
Chess, E.K.; Lapp, R.L.; Gross, M.L., The question of tautomerism of alkylnitrile and isonitrile radical cations, Org. Mass Spectrom., 1982, 17, 475. [all data]

Allam, Migahed, et al., 1982
Allam, S.H.; Migahed, M.D.; El-Khodary, A., Electron impact ionization and dissociation of deuterated and non-deuterated methanol, methyl cyanide, nitromethane and nitrobenzene, Egypt. J. Phys., 1982, 13, 167. [all data]

Rider, Ray, et al., 1981
Rider, D.M.; Ray, G.W.; Darland, E.J.; Leroi, G.E., A photoionization mass spectrometric investigation of CH3CN and CD3CN, J. Chem. Phys., 1981, 74, 1652. [all data]

Kimura, Katsumata, et al., 1981
Kimura, K.; Katsumata, S.; Achiba, Y.; Yamazaki, T.; Iwata, S., Ionization energies, Ab initio assignments, and valence electronic structure for 200 molecules in Handbook of HeI Photoelectron Spectra of Fundamental Organic Compounds, Japan Scientific Soc. Press, Tokyo, 1981. [all data]

Staley, Kleckner, et al., 1976
Staley, R.H.; Kleckner, J.E.; Beauchamp, J.L., Relationship between orbital ionization energies and molecular properties. Proton affinities and photoelectron spectra of nitriles, J. Am. Chem. Soc., 1976, 98, 2081. [all data]

Lake and Thompson, 1970
Lake, R.F.; Thompson, H., The photoelectron spectra of some molecules containing the C N group, Proc. Roy. Soc. (London), 1970, A317, 187. [all data]

Frost, Herring, et al., 1970
Frost, D.C.; Herring, F.G.; McDowell, C.A.; Stenhouse, I.A., The ionization potentials of methyl cyanide and methyl acetylene by photoelectron spectroscopy and semi-rigorous LCAO SCF calculations, Chem. Phys. Lett., 1970, 4, 533. [all data]

Dibeler and Liston, 1968
Dibeler, V.H.; Liston, S.K., Mass-spectrometric study of photoionization. IX. Hydrogen cyanide and acetonitrile, J. Chem. Phys., 1968, 48, 4765. [all data]

Franklin, Wada, et al., 1966
Franklin, J.L.; Wada, Y.; Natalis, P.; Hierl, P.M., Ion-molecule reactions in acetonitrile and propionitrile, J. Phys. Chem., 1966, 70, 2353. [all data]

Nicholson, 1965
Nicholson, A.J.C., Photoionization-efficiency curves. II. False and genuine structure, J. Chem. Phys., 1965, 43, 1171. [all data]

Watanabe, Nakayama, et al., 1962
Watanabe, K.; Nakayama, T.; Mottl, J., Ionization potentials of some molecules, J. Quant. Spectry. Radiative Transfer, 1962, 2, 369. [all data]

Asbrink, Von Niessen, et al., 1980
Asbrink, L.; Von Niessen, W.; Bieri, G., 30.4-nm He(II) photoelectron spectra of organic molecules, J. Electron Spectrosc. Relat. Phenom., 1980, 21, 93. [all data]

Reed and Snedden, 1956
Reed, R.I.; Snedden, W., Studies in electron impact methods. Part 6.-The formation of the methine and carbon ions, J. Chem. Soc. Faraday Trans., 1956, 55, 876. [all data]

Haney and Franklin, 1968
Haney, M.A.; Franklin, J.L., Correlation of excess energies of electron-impact dissociations with the translational energies of the products, J.Chem. Phys., 1968, 48, 4093. [all data]

Holmes, Lossing, et al., 1993
Holmes, J.L.; Lossing, F.P.; Mayer, P.M., The effects of methyl substitution on the structure and thermochemistry of the cyanomethyl radical and cation, Chem. Phys. Lett., 1993, 212, 134. [all data]

Pottie and Lossing, 1961
Pottie, R.F.; Lossing, F.P., Free radicals by mass spectrometry. XXV. Ionization potentials of cyanoalkyl radicals, J. Am. Chem. Soc., 1961, 83, 4737. [all data]


Notes

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