Acetonitrile

• Formula: C₂H₃N
• Molecular weight: 41.0519
• IUPAC Standard InChI: InChI=1S/C2H3N/c1-2-3/h1H3 Copy

  
• IUPAC Standard InChIKey: WEVYAHXRMPXWCK-UHFFFAOYSA-N Copy
• CAS Registry Number: 75-05-8
• Chemical structure:
  This structure is also available as a 2d Mol file or as a computed 3d SD file
  The 3d structure may be viewed using Java or Javascript.
• Other names: Cyanomethane; Ethanenitrile; Ethyl nitrile; Methane, cyano-; Methanecarbonitrile; Methyl cyanide; CH3CN; Acetonitril; Cyanure de methyl; USAF EK-488; Methylkyanid; NA 1648; NCI-C60822; Rcra waste number U003; UN 1648; Ethanonitrile
• Permanent link for this species. Use this link for bookmarking this species for future reference.
• Information on this page:
  • Gas phase thermochemistry data
  • Condensed phase thermochemistry data
  • Phase change data
  • Reaction thermochemistry data (reactions 1 to 50)
  • IR Spectrum
  • Mass spectrum (electron ionization)
  • Vibrational and/or electronic energy levels
  • References
  • Notes
• Other data available:
  • Reaction thermochemistry data: reactions 51 to 100, reactions 101 to 150, reactions 151 to 188
  • Henry's Law data
  • Gas phase ion energetics data
  • Ion clustering data
  • UV/Visible spectrum
  • Gas Chromatography
• Data at other public NIST sites:
  • Computational Chemistry Comparison and Benchmark Database
  • Gas Phase Kinetics Database
  • X-ray Photoelectron Spectroscopy Database, version 5.0
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Gas phase 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 by: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Condensed phase 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:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing

Constant pressure heat capacity of liquid

Phase change 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:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
BS - Robert L. Brown and Stephen E. Stein
AC - William E. Acree, Jr., James S. Chickos
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing

Enthalpy of vaporization

Entropy of vaporization

Antoine Equation Parameters

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

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Enthalpy of fusion

Enthalpy of phase transition

Entropy of phase transition

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
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

 +  = ( • )

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

 +  = ( • )

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

 +  = ( • )

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

CN^- +  = (CN^- • )

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

C₂H₂N^- +  =

By formula: C₂H₂N^- + H⁺ = C₂H₃N

( • ) +  = ( • 2)

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

C₂H₄N⁺ +  = (C₂H₄N⁺ • )

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

 +  = ( • )

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

( • 3) +  = ( • 4)

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

( • 3) +  = ( • 4)

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

( • 2) +  = ( • 3)

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

( • ) +  = ( • 2)

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

( • 2) +  = ( • 3)

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

( • 2) +  = ( • 3)

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

( • ) +  = ( • 2)

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

( • 4) +  = ( • 5)

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

( • 2) +  = ( • 3)

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

( • ) +  = ( • 2)

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

( • 3) +  = ( • 4)

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

C₃H₉Sn⁺ +  = (C₃H₉Sn⁺ • )

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

Free energy of reaction

(C₂H₄N⁺ •  • 2) +  = (C₂H₄N⁺ • 2 • 2)

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

Bond type: Hydrogen bond (positive ion to hydride)

Free energy of reaction

C₂H₂N^- +  = (C₂H₂N^- • )

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

( • 7) +  = ( • 8)

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

(C₂H₄N⁺ •  • 4) +  = (C₂H₄N⁺ • 2 • 4)

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

Free energy of reaction

(CH₆N⁺ • 2) +  = (CH₆N⁺ •  • 2)

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

Free energy of reaction

C₁₁H₁₀⁺ +  = (C₁₁H₁₀⁺ • )

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

Free energy of reaction

( • 6) +  = ( • 7)

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

( • 4) +  = ( • 5)

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

( • 3) +  = ( • 4)

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

( • 4) +  = ( • 5)

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

( • 5) +  = ( • 6)

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

( • 4) +  = ( • 5)

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

( • 5) +  = ( • 6)

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

( • 6) +  = ( • 7)

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

( • 6) +  = ( • 7)

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

C₉H₉N₃O₃W (cr) = 0.5 (g) + 0.5 (cr) + 3 (g)

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

C₇H₄N₂O₂^- +  = (C₇H₄N₂O₂^- • )

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

C₇H₇NO₃^- +  = (C₇H₇NO₃^- • )

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

( • 4) +  = ( • 5)

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

C₇H₄F₃NO₂^- +  = (C₇H₄F₃NO₂^- • )

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

( • 2) +  = ( • 3)

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

( • 3) +  = ( • 4)

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

( • ) +  = ( • 2)

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

( • 5) +  = ( • 6)

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

 +  = ( • )

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

(C₂H₄N⁺ • 2 • ) +  = (C₂H₄N⁺ • 3 • )

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

Bond type: Hydrogen bond (positive ion to hydride)

 +  = ( • )

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

(C₂H₄N⁺ •  • ) +  = (C₂H₄N⁺ • 2 • )

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

Bond type: Hydrogen bond (positive ion to hydride)

 +  = ( • )

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

(C₂H₄N⁺ •  • ) +  = (C₂H₄N⁺ • 2 • )

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

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

IR Spectrum

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Data compiled by: Coblentz Society, Inc.

• GAS (80 mmHg, N2 ADDED, TOTAL PRESSURE 600 mmHg); DOW KBr FOREPRISM-GRATING; DIGITIZED BY COBLENTZ SOCIETY (BATCH II) FROM HARD COPY; 2 cm^-1 resolution
• LIQUID (NEAT); BECKMAN IR-9 (GRATING); DIGITIZED BY NIST FROM HARD COPY (FROM TWO SEGMENTS); 4 cm^-1 resolution

Data compiled by: Tanya L. Myers, Russell G. Tonkyn, Ashley M. Oeck, Tyler O. Danby, John S. Loring, Matthew S. Taubman, Stephen W. Sharpe, Jerome C. Birnbaum, and Timothy J. Johnson

• liquid; Bruker Tensor 27 FTIR; 0.48212986 cm^-1 resolution

Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director

• gas

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

• gas; IFS66V (Bruker); 3-Term B-H Apodization
  0.1250, 0.2410, 0.4820, 0.9640, 1.9290 cm^-1 resolution
• gas; IFS66V (Bruker); Boxcar Apodization
  0.1250, 0.2410, 0.4820, 0.9640, 1.9290 cm^-1 resolution
• gas; IFS66V (Bruker); Happ Genzel Apodization
  0.1250, 0.2410, 0.4820, 0.9640, 1.9290 cm^-1 resolution
• gas; IFS66V (Bruker); NB Strong Apodization
  0.1250, 0.2410, 0.4820, 0.9640, 1.9290 cm^-1 resolution
• gas; IFS66V (Bruker); Triangular Apodization
  0.1250, 0.2410, 0.4820, 0.9640, 1.9290 cm^-1 resolution

Mass spectrum (electron ionization)

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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 by: NIST Mass Spectrometry Data Center, William E. Wallace, director

Spectrum

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Additional Data

Vibrational and/or electronic energy levels

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, IR Spectrum, Mass spectrum (electron ionization), References, Notes

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

Data compiled by: Takehiko Shimanouchi

Symmetry:   C_3ν     Symmetry Number σ = 3

Source: Shimanouchi, 1972

Notes

References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, IR Spectrum, Mass spectrum (electron ionization), Vibrational and/or electronic energy levels, 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]

Lemoult and Jungfleisch, 1909
Lemoult, M.P.; Jungfleisch, M.E., Thermochimie. - Comparaisons entre les nitriles et les carbylamines, Compt. Rend., 1909, 148, 1602-1604. [all data]

Putnam, McEachern, et al., 1965
Putnam, W.E.; McEachern, D.M., Jr.; Kilpatrick, J.E., Entropy and related thermodynamic properties of acetonitrile (methyl cyanide), J. Chem. Phys., 1965, 42, 749-755. [all data]

Kolker, Kulikov, et al., 1992
Kolker, A.M.; Kulikov, M.V.; Krestov, Al.G., Volumes and heat capacities of binary non-aqueous mixtures. Part 2. The systems acetonitrile-N,N-dimethylformamide and acetonitrile-hexamethylphosphoric triamide, Thermochim. Acta, 1992, 211, 73-84. [all data]

Mirzaliev, Shakhuradov, et al., 1987
Mirzaliev, A.A.; Shakhuradov, Sh.G.; Guseinov, S.O., Investigation of the isobaric heat capacity of nitriles at different temperatures, Izv. Vyssh. Ucheb. Zaved., Neft i Gaz, 1987, 30(4), 55-58. [all data]

Guseinov and Mirzaliev, 1984
Guseinov, S.O.; Mirzaliev, A.A., Some results of various measurements of the isobaric heat capacity by the montonic heating, Izv. Vyshch. Ucheb. Zaved., Neft i Gaz, 1984, (5), 42-45. [all data]

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de Visser, C.; Somsen, G., Thermochemical behavior of mixtures of N,N-dimethylformamide with dimethylsulfoxide, acetonitrile, and N-methylformamide: volumes and heat capacities, J. Solution Chem., 1979, 8, 593-600. [all data]

De Visser, Heuvelsland, et al., 1978
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Putnam, McEachern, et al., 1965, 2
Putnam, W.E.; McEachern, D.M.; Kilpatrick, J.E., Entropy and related thermodynamic properties of acetonitrile (methyl cyanide), J. Chem. Phys., 1965, 42, 749-55. [all data]

Majer and Svoboda, 1985
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Antosik, Galka, et al., 2004
Antosik, Maria; Galka, Maria; Malanowski, Stanislaw K., Vapor-Liquid Equilibrium for Acetonitrile + Propanenitrile and 1-Pentanamine + 1-Methoxy-2-propanol ^«8224», J. Chem. Eng. Data, 2004, 49, 1, 11-17, https://doi.org/10.1021/je025660t . [all data]

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Stephenson and Malanowski, 1987
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Meyer, Renner, et al., 1971
Meyer, Edwin F.; Renner, Terrence A.; Stec, Kenneth S., Cohesive energies in polar organic liquids. II. n-Alkane nitriles and the 1-chloro alkanes, J. Phys. Chem., 1971, 75, 5, 642-648, https://doi.org/10.1021/j100675a008 . [all data]

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Dojcansky, J.; Heinrich, J., Chem. Zvesti, 1974, 28, 157. [all data]

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

Kushchenko and Mishchenko, 1968
Kushchenko, V.V.; Mishchenko, K.P., Zh. Prikl. Khim., 1968, 41, 3, 646. [all data]

Putnam, McEachern, et al., 1965, 3
Putnam, William E.; McEachern, Douglas Marvin; Kilpatrick, John E., Entropy and Related Thermodynamic Properties of Acetonitrile (Methyl Cyanide), J. Chem. Phys., 1965, 42, 2, 749, https://doi.org/10.1063/1.1696002 . [all data]

Dojcansky and Heinrich, 1974, 2
Dojcansky, J.; Heinrich, J., Saturated Vapour Pressure of Acetonitrile, Chem. Zvesti, 1974, 28, 2, 157-159. [all data]

Domalski and Hearing, 1996
Domalski, Eugene S.; Hearing, Elizabeth D., Heat Capacities and Entropies of Organic Compounds in the Condensed Phase. Volume III, J. Phys. Chem. Ref. Data, 1996, 25, 1, 1, https://doi.org/10.1063/1.555985 . [all data]

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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
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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
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