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
  • Reaction thermochemistry data (reactions 1 to 50)
  • IR Spectrum
  • Gas Chromatography
  • References
  • Notes
• Other data available:
  • Condensed phase thermochemistry data
  • Phase change data
  • 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
  • Mass spectrum (electron ionization)
  • UV/Visible spectrum
  • Vibrational and/or electronic energy levels
• Data at other public NIST sites:
  • Gas Phase Kinetics Database
  • X-ray Photoelectron Spectroscopy Database, version 5.0
• Options:
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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

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

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Gas Chromatography, References, Notes

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

Gas Chromatography

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, IR Spectrum, 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: NIST Mass Spectrometry Data Center, William E. Wallace, director

Kovats' RI, non-polar column, isothermal

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Kovats' RI, polar column, isothermal

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Van Den Dool and Kratz RI, polar column, temperature ramp

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Normal alkane RI, non-polar column, isothermal

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Normal alkane RI, non-polar column, temperature ramp

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Normal alkane RI, non-polar column, custom temperature program

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Normal alkane RI, polar column, temperature ramp

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Normal alkane RI, polar column, custom temperature program

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References

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, IR Spectrum, Gas Chromatography, 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 C_2v 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
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Notes

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, IR Spectrum, Gas Chromatography, References

• Symbols used in this document:
  

  T	Temperature
  ΔfH°gas	Enthalpy of formation of gas at standard conditions
  ΔrG°	Free energy of reaction at standard conditions
  ΔrH°	Enthalpy of reaction at standard conditions
  ΔrS°	Entropy of reaction at standard conditions

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