Methylamine, N,N-dimethyl-

• Formula: C₃H₉N
• Molecular weight: 59.1103
• IUPAC Standard InChI: InChI=1S/C3H9N/c1-4(2)3/h1-3H3 Copy

  
• IUPAC Standard InChIKey: GETQZCLCWQTVFV-UHFFFAOYSA-N Copy
• CAS Registry Number: 75-50-3
• 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: Trimethylamine; Methanamine, N,N-dimethyl-; TMA; UN 1083; UN 1297
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• Information on this page:
  • Condensed phase thermochemistry data
  • Phase change data
  • References
  • Notes
• Other data available:
  • Gas phase thermochemistry data
  • Reaction thermochemistry data
  • Henry's Law data
  • Gas phase ion energetics data
  • Ion clustering data
  • IR Spectrum
  • Mass spectrum (electron ionization)
  • Gas Chromatography
• Data at other public NIST sites:
  • Gas Phase Kinetics Database
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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:
BS - Robert L. Brown and Stephen E. Stein
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DRB - Donald R. Burgess, Jr.
DH - Eugene S. Domalski and Elizabeth D. Hearing
AC - William E. Acree, Jr., James S. Chickos

Enthalpy of vaporization

Enthalpy of vaporization

Δ_vapH = A exp(-βT_r) (1 − T_r)^β
    Δ_vapH = Enthalpy of vaporization (at saturation pressure) (kcal/mol)
    T_r = reduced temperature (T / T_c)

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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

Entropy of fusion

References

Go To: Top, Condensed phase thermochemistry data, Phase change data, Notes

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

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]

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

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, Sagenkahn, et al., 1944
Aston, J.G.; Sagenkahn, M.L.; Szasa, G.J.; Moessen, G.W.; Zuhr, H.F., The heat capacity and entropy, heats of fusion and vaporization and the vapor pressure of trimethylamine. The entropy from spectroscopic and molecular data, J. Am. Chem. Soc., 1944, 66, 1171-1177. [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]

Simon and Huter, 1935
Simon, A.; Huter, J., Vapor Pressure Curves, Melting Point and Chemical Constants of Dimethyl, Trimethyl- and Isobutylamines, Z. Elektrochem., 1935, 41, 28. [all data]

Simon and Huter, 1935, 2
Simon, A.; Huter, J., Z. Elektrochem., 1935, 41, 294. [all data]

Wiberg and Sutterlin, 1935
Wiberg, E.; Sutterlin, W., The Vapor Pressures and Melting Points of Dimethyl- and Trimethylamine Trimethylamines, Z. Elektrochem., 1935, 41, 151. [all data]

Timmermans and Mattaar, 1921
Timmermans, J.; Mattaar, J.F., Freezing points of orgainic substances VI. New experimental determinations., Bull. Soc. Chim. Belg., 1921, 30, 213. [all data]

Aston, Sagenkahn, et al., 1944, 2
Aston, J.G.; Sagenkahn, M.L.; Szasz, G.J.; Moessen, G.W.; Zuhr, H.F., The Heat Capacity and Entropy, Heats of Fusion and Vaporization and the Vapor Pressure of Trimethylamine. The Entropy From Spectroscopic and Molecular Data, J. Am. Chem. Soc., 1944, 66, 1171. [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]

Kay and Young, 1974
Kay, W.B.; Young, C.L., Int. DATA Ser., Sel. Data Mixtures, Ser. A, 1974, No. 2, 154. [all data]

Day and Felsing, 1950
Day, H.O.; Felsing, W.A., Some Vapor Pressures and the Critical COnstants of Trimethylamine, J. Am. Chem. Soc., 1950, 72, 1698. [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]

Day and Felsing, 1950, 2
Day, H.O.; Felsing, W.A., Some Vapor Pressures and the Critical Constants of Trimethylamine, J. Am. Chem. Soc., 1950, 72, 4, 1698-1699, https://doi.org/10.1021/ja01160a077 . [all data]

Swift and Hochanadel, 1945
Swift, Elijah; Hochanadel, Helen Phillips, The Vapor Pressure of Trimethylamine from 0 to 40°, J. Am. Chem. Soc., 1945, 67, 5, 880-881, https://doi.org/10.1021/ja01221a508 . [all data]

Aston, Sagenkahn, et al., 1944, 3
Aston, J.G.; Sagenkahn, M.L.; Szasz, G.J.; Moessen, G.W.; Zuhr, H.F., The heat capacity and entropy, heats of fusion and vaporization and the vapor pressure of trimethylamine. The entropy from spectroscopic and molecular data, J. Am. Chem. Soc., 1944, 66, 1171-11. [all data]

Thompson and Linnett, 1936
Thompson, H.W.; Linnett, J.W., The vapour pressures and association of some metallic and non-metallic alkyls, Trans. Faraday Soc., 1936, 32, 681-685. [all data]

Acree, 1991
Acree, William E., Thermodynamic properties of organic compounds: enthalpy of fusion and melting point temperature compilation, Thermochimica Acta, 1991, 189, 1, 37-56, https://doi.org/10.1016/0040-6031(91)87098-H . [all data]

Notes

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• Symbols used in this document:
  

  Cp,liquid	Constant pressure heat capacity of liquid
  Pc	Critical pressure
  S°liquid	Entropy of liquid at standard conditions
  Tboil	Boiling point
  Tc	Critical temperature
  Tfus	Fusion (melting) point
  Ttriple	Triple point temperature
  Vc	Critical volume
  ΔcH°liquid	Enthalpy of combustion of liquid at standard conditions
  ΔfH°liquid	Enthalpy of formation of liquid at standard conditions
  ΔfusH	Enthalpy of fusion
  ΔfusS	Entropy of fusion
  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
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