Methylamine

• Formula: CH₅N
• Molecular weight: 31.0571
• IUPAC Standard InChI: InChI=1S/CH5N/c1-2/h2H2,1H3 Copy

  
• IUPAC Standard InChIKey: BAVYZALUXZFZLV-UHFFFAOYSA-N Copy
• CAS Registry Number: 74-89-5
• 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.
• Isotopologues:
  • methan-d3-amine
• Other names: Methanamine; Aminomethane; Carbinamine; Monomethylamine; CH3NH2; Mercurialin; Methylaminen; Metilamine; Metyloamina; UN 1061; MMA
• 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
  • Henry's Law data
  • IR Spectrum
  • Mass spectrum (electron ionization)
  • UV/Visible spectrum
  • Vibrational and/or electronic energy levels
  • References
  • Notes
• Other data available:
  • Gas phase ion energetics data
  • Ion clustering data
  • Gas Chromatography
• Data at other public NIST sites:
  • Gas Phase Kinetics Database
• Options:
  • Switch to calorie-based units

Data at NIST subscription sites:

• NIST / TRC Web Thermo Tables, "lite" edition (thermophysical and thermochemical data)
• NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data)

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, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, Vibrational and/or electronic energy levels, 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: Donald R. Burgess, Jr.

Condensed phase thermochemistry data

Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, Vibrational and/or electronic energy levels, 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:
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

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, Henry's Law data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, Vibrational and/or electronic energy levels, 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:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
DH - Eugene S. Domalski and Elizabeth D. Hearing
AC - William E. Acree, Jr., James S. Chickos
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Enthalpy of vaporization

Entropy of vaporization

Antoine Equation Parameters

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

View plot Requires a JavaScript / HTML 5 canvas capable browser.

Enthalpy of fusion

Entropy of fusion

Reaction thermochemistry data

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Henry's Law data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, Vibrational and/or electronic energy levels, 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:
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
RCD - Robert C. Dunbar
B - John E. Bartmess
MS - José A. Martinho Simões
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

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.

Individual Reactions

 +  = ( • )

By formula: Li⁺ + CH₅N = (Li⁺ • CH₅N)

C₃H₉Sn⁺ +  = (C₃H₉Sn⁺ • )

By formula: C₃H₉Sn⁺ + CH₅N = (C₃H₉Sn⁺ • CH₅N)

Free energy of reaction

 +  = ( • )

By formula: K⁺ + CH₅N = (K⁺ • CH₅N)

 +  = ( • )

By formula: Na⁺ + CH₅N = (Na⁺ • CH₅N)

Free energy of reaction

(CH₆N⁺ • 2) +  = (CH₆N⁺ • 3)

By formula: (CH₆N⁺ • 2CH₅N) + CH₅N = (CH₆N⁺ • 3CH₅N)

(CH₆N⁺ • ) +  = (CH₆N⁺ • 2)

By formula: (CH₆N⁺ • CH₅N) + CH₅N = (CH₆N⁺ • 2CH₅N)

CH₄N^- +  =

By formula: CH₄N^- + H⁺ = CH₅N

C₃H₉Si⁺ +  = (C₃H₉Si⁺ • )

By formula: C₃H₉Si⁺ + CH₅N = (C₃H₉Si⁺ • CH₅N)

CH₆N⁺ +  = (CH₆N⁺ • )

By formula: CH₆N⁺ + CH₅N = (CH₆N⁺ • CH₅N)

C₆H₁₂NO₃⁺ +  = (C₆H₁₂NO₃⁺ • )

By formula: C₆H₁₂NO₃⁺ + CH₅N = (C₆H₁₂NO₃⁺ • CH₅N)

Bond type: Hydrogen bonds with polydentate bonding in positive ions

( • ) +  = ( • 2)

By formula: (Pb⁺ • CH₅N) + CH₅N = (Pb⁺ • 2CH₅N)

 +  = ( • )

By formula: Pb⁺ + CH₅N = (Pb⁺ • CH₅N)

(CH₆N⁺ • 3) +  = (CH₆N⁺ • 4)

By formula: (CH₆N⁺ • 3CH₅N) + CH₅N = (CH₆N⁺ • 4CH₅N)

C₂H₈N⁺ +  = (C₂H₈N⁺ • )

By formula: C₂H₈N⁺ + CH₅N = (C₂H₈N⁺ • CH₅N)

C₅H₁₁BrMg (solution) +  (solution) = CH₄BrMgN (solution) +  (solution)

By formula: C₅H₁₁BrMg (solution) + CH₅N (solution) = CH₄BrMgN (solution) + C₅H₁₂ (solution)

2 =  + 

By formula: 2CH₅N = C₂H₇N + H₃N

2 =  + 

By formula: 2C₂H₇N = CH₅N + C₃H₉N

Henry's Law data

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

Henry's Law constant (water solution)

k_H(T) = k°_H exp(d(ln(k_H))/d(1/T) ((1/T) - 1/(298.15 K)))
k°_H = Henry's law constant for solubility in water at 298.15 K (mol/(kg*bar))
d(ln(k_H))/d(1/T) = Temperature dependence constant (K)

IR Spectrum

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Mass spectrum (electron ionization), UV/Visible spectrum, Vibrational and/or electronic energy levels, 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

Gas Phase Spectrum

Notice: This spectrum may be better viewed with a Javascript and HTML 5 enabled browser.

For Zoom

1.) Enter the desired X axis range (e.g., 100, 200)

2.) Check here for automatic Y scaling

3.) Press here to zoom

Notice: Concentration information is not available for this spectrum and, therefore, molar absorptivity values cannot be derived.

Additional Data

Mass spectrum (electron ionization)

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, IR Spectrum, UV/Visible spectrum, Vibrational and/or electronic energy levels, 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

Spectrum

Notice: This spectrum may be better viewed with a Javascript and HTML 5 enabled browser.

For Zoom

1.) Enter the desired X axis range (e.g., 100, 200)

2.) Check here for automatic Y scaling

3.) Press here to zoom

Additional Data

UV/Visible spectrum

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, IR Spectrum, Mass spectrum (electron ionization), Vibrational and/or electronic energy levels, 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: Victor Talrose, Eugeny B. Stern, Antonina A. Goncharova, Natalia A. Messineva, Natalia V. Trusova, Margarita V. Efimkina

Spectrum

Notice: This spectrum may be better viewed with a Javascript and HTML 5 enabled browser.

For Zoom

1.) Enter the desired X axis range (e.g., 100, 200)

2.) Check here for automatic Y scaling

3.) Press here to zoom

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, Henry's Law data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible 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: Takehiko Shimanouchi

Symmetry:   C_s     Symmetry Number σ = 1

Source: Shimanouchi, 1972

Notes

References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, 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.

Aston, Siller, et al., 1937
Aston, J.G.; Siller, C.W.; Messerly, G.H., Heat capacities and entropies of organic compounds. III. Methylamine from 11.5°K. to the boiling point. Heat of vaporization and vapor pressure. The entropy from molecular data, J. Am. Chem. Soc., 1937, 59, 1743-17. [all data]

Lemoult, 1907
Lemoult, M.P., Recherches theoriques et experimentales sur les chaleurs de combustion et de formation des composes organiques, Ann. Chim. Phys., 1907, 12, 395-432. [all data]

Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G., Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [all data]

Muller, 1910
Muller, J.-A., Sur les chaleurs de combustion et les poids specifiques des methylamines, Ann. Chim. Phys., 1910, 20, 116-130. [all data]

Aston, Siller, et al., 1937, 2
Aston, J.G.; Siller, C.W.; Messerly, G.H., Heat capacities and entropies of organic compounds. III. Methylamine from 12K to the boiling point. Heat of vaporization and vapor pressure. The entropy from molecular data, J. Am. Chem. Soc., 1937, 59, 1743-1751. [all data]

Roberts, Emeleus, et al., 1939
Roberts, E.R.; Emeleus, H.J.; Briscoe, H.V.A., Preparation and Prop. of Ethyldideuteramine and Dimethyldeuteramine, J. Chem. Soc., 1939, 1939, 41. [all data]

Emeleus and Briscoe, 1937
Emeleus, H.J.; Briscoe, H.V.A., Preparation and Properties of Methyldideuteramine, J. Chem. Soc., 1937, 1937, 127. [all data]

McNeight and Smyth, 1936
McNeight, S.A.; Smyth, C.P., Non-Rotation of Molecules in a Number of Solids, J. Am. Chem. Soc., 1936, 58, 1718. [all data]

Aston, Siller, et al., 1937, 3
Aston, J.G.; Siller, C.W.; Messerly, G.H., Heat Capacities and Entropies of Organic Compounds III. Methylamine from 11.5 K to the Boiling Point. Heat of Vaporization and Vapor Pressure. The Entropy from Molecular Data, J. Am. Chem. Soc., 1937, 59, 1743. [all data]

Li and Kiran, 1988
Li, L.; Kiran, E., Gas-Liquid Critical Properties of Methylamine + Nitrous Oxide and Methylamine + Ethylene Binary Mixtures, J. Chem. Eng. Data, 1988, 33, 342. [all data]

Kay and Young, 1974
Kay, W.B.; Young, C.L., Int. DATA Ser., Sel. Data Mixtures, Ser. A, 1974, No. 2, 158. [all data]

Berthoud, 1917
Berthoud, A., Determination of Critical Temperatures and Pressures of Amines and Alkyl Chlorides, J. Chim. Phys. Phys.-Chim. Biol., 1917, 15, 3. [all data]

Majer and Svoboda, 1985
Majer, V.; Svoboda, V., Enthalpies of Vaporization of Organic Compounds: A Critical Review and Data Compilation, Blackwell Scientific Publications, Oxford, 1985, 300. [all data]

Stephenson and Malanowski, 1987
Stephenson, Richard M.; Malanowski, Stanislaw, Handbook of the Thermodynamics of Organic Compounds, 1987, https://doi.org/10.1007/978-94-009-3173-2 . [all data]

Dykyj, 1970
Dykyj, J., Petrochemica, 1970, 10, 2, 51. [all data]

Boublik, Fried, et al., 1984
Boublik, T.; Fried, V.; Hala, E., The Vapour Pressures of Pure Substances: Selected Values of the Temperature Dependence of the Vapour Pressures of Some Pure Substances in the Normal and Low Pressure Region, 2nd ed., Elsevier, New York, 1984, 972. [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]

Woodin and Beauchamp, 1978
Woodin, R.L.; Beauchamp, J.L., Bonding of Li+ to Lewis Bases in the Gas Phase. Reversals in Methyl Substituent Effects for Different Reference Acids, J. Am. Chem. Soc., 1978, 100, 2, 501, https://doi.org/10.1021/ja00470a024 . [all data]

Dzidic and Kebarle, 1970
Dzidic, I.; Kebarle, P., Hydration of the Alkali Ions in the Gas Phase. Enthalpies and Entropies of Reactions M+(H2O)n-1 + H2O = M+(H2O)n, J. Phys. Chem., 1970, 74, 7, 1466, https://doi.org/10.1021/j100702a013 . [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]

Davidson and Kebarle, 1976
Davidson, W.R.; Kebarle, P., Binding Energies and Stabilities of Potassium Ion Complexes from Studies of Gas Phase Ion Equilibria K+ + M = K+.M, J. Am. Chem. Soc., 1976, 98, 20, 6133, https://doi.org/10.1021/ja00436a011 . [all data]

Davidson and Kebarle, 1976, 2
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]

Hoyau, Norrman, et al., 1999
Hoyau, S.; Norrman, K.; McMahon, T.B.; Ohanessian, G., A Quantitative Basis for a Scale of Na+ Affinities of Organic and Small Biological Molecules in the Gas Phase, J. Am. Chem. Soc., 1999, 121, 38, 8864, https://doi.org/10.1021/ja9841198 . [all data]

Guo and Castleman, 1990
Guo, B.C.; Castleman, A.W., The Association Reactions of Pb+ Ion with CH3OH and CH3NH2 in the Gas Phase, Int. J. Mass Spectrom. Ion Proc., 1990, 100, 665, https://doi.org/10.1016/0168-1176(90)85101-7 . [all data]

McMahon and Ohanessian, 2000
McMahon, T.B.; Ohanessian, G., An Experimental and Ab Initio Study of the Nature of the Binding in Gas-Phase Complexes of Sodium Ions, Chem. Eur. J., 2000, 6, 16, 2931, https://doi.org/10.1002/1521-3765(20000818)6:16<2931::AID-CHEM2931>3.0.CO;2-7 . [all data]

Meot-Ner (Mautner), 1992
Meot-Ner (Mautner), M., Intermolecular Forces in Organic Clusters, J. Am. Chem. Soc., 1992, 114, 9, 3312, https://doi.org/10.1021/ja00035a024 . [all data]

Holland and Castleman, 1982
Holland, P.M.; Castleman, A.W., The Thermochemical Properties of Gas - Phase Transition Metal Ion Complexes, J. Chem. Phys., 1982, 76, 8, 4195, https://doi.org/10.1063/1.443497 . [all data]

Radisic, Xu, et al., 2002
Radisic, D.; Xu, S.J.; Bowen, K.H., Photoelectron spectroscopy of the anions, CH3NH- and (CH3)(2)N- and the anion complexes, H-(CH3NH2) and (CH3)(2)N-[(CH3)(2)NH), Chem. Phys. Lett., 2002, 354, 1-2, 9-13, https://doi.org/10.1016/S0009-2614(01)01470-1 . [all data]

MacKay, Hemsworth, et al., 1976
MacKay, G.J.; Hemsworth, R.S.; Bohme, D.K., Absolute gas-phase acidities of CH₃NH₂, C₂H₅NH₂, (CH₃)₂NH, and (CH₃)₃N, Can. J. Chem., 1976, 54, 1624. [all data]

Li and Stone, 1990
Li, X.; Stone, A.J., Gas-Phase (CH3)3Si+ Affinities of Alkylamines and Proton Affinities of Trimethylsilyl Alkylamines, Int. J. Mass Spectrom. Ion Proc., 1990, 101, 2-3, 149, https://doi.org/10.1016/0168-1176(90)87008-5 . [all data]

Wojtyniak and Stone, 1986
Wojtyniak, A.C.M.; Stone, A.J., A High-Pressure Mass Spectrometric Study of the Bonding of Trimethylsilylium to Oxygen and Aromatic Bases, Can. J. Chem., 1986, 74, 59. [all data]

Yamdagni and Kebarle, 1973
Yamdagni, R.; Kebarle, P., Gas - Phase Basicites of Amines. Hydrogen Bonding in Proton - Bound Amine Dimers and Proton - Induced Cyclization of alpha, omega - Diamines, J. Am. Chem. Soc., 1973, 95, 11, 3504, https://doi.org/10.1021/ja00792a010 . [all data]

Meot-Ner, 1984
Meot-Ner, (Mautner), The Ionic Hydrogen Bond. 4. Intramolecular and Multiple Bonds. Proton Affinities, Hydration and Complexes of Amides and Amino Acid Derivatives, J. Am. Chem. Soc., 1984, 106, 2, 278, https://doi.org/10.1021/ja00314a003 . [all data]

Holm, 1983
Holm, T., Acta Chem. Scand. B, 1983, 37, 797. [all data]

Issoire and Long, 1960
Issoire, J.; Long, C., Etude de la thermodynamique chimique de la reaction de formation des methylamines, Bull. Soc. Chim. France, 1960, 2004-2012. [all data]

Tannenbaum, Coffin, et al., 1953
Tannenbaum, E.; Coffin, E.M.; Harrison, A.J., The far ultraviolet absorption spectra of simple alkyl amines, J. Chem. Phys., 1953, 21, 2, 311-318. [all data]

Shimanouchi, 1972
Shimanouchi, T., Tables of Molecular Vibrational Frequencies Consolidated Volume I, National Bureau of Standards, 1972, 1-160. [all data]

Notes

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, Vibrational and/or electronic energy levels, References

• Symbols used in this document:
  

  Cp,liquid	Constant pressure heat capacity of liquid
  Pc	Critical pressure
  S°liquid	Entropy of liquid at standard conditions
  T	Temperature
  Tboil	Boiling point
  Tc	Critical temperature
  Tfus	Fusion (melting) point
  Ttriple	Triple point temperature
  Vc	Critical volume
  d(ln(kH))/d(1/T)	Temperature dependence parameter for Henry's Law constant
  k°H	Henry's Law constant at 298.15K
  ΔcH°liquid	Enthalpy of combustion of liquid at standard conditions
  ΔfH°gas	Enthalpy of formation of gas at standard conditions
  ΔfH°liquid	Enthalpy of formation of liquid at standard conditions
  ΔfusH	Enthalpy of fusion
  ΔfusS	Entropy of fusion
  ΔrG°	Free energy of reaction at standard conditions
  ΔrH°	Enthalpy of reaction at standard conditions
  ΔrS°	Entropy of reaction at standard conditions
  ΔvapH	Enthalpy of vaporization
  ΔvapH°	Enthalpy of vaporization at standard conditions
  ΔvapS	Entropy of vaporization

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
• The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
• Customer support for NIST Standard Reference Data products.