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
• 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
  • Gas phase ion energetics data
  • Ion clustering data
  • IR Spectrum
  • References
  • Notes
• Other data available:
  • Henry's Law data
  • Mass spectrum (electron ionization)
  • Gas Chromatography
• Data at other public NIST sites:
  • Gas Phase Kinetics Database
• Options:
  • Switch to SI units

Data at NIST subscription sites:

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

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Gas phase thermochemistry data

Go To: Top, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering 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 as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DRB - Donald R. Burgess, Jr.

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

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:
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
B - John E. Bartmess
RCD - Robert C. Dunbar
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⁺ + C₃H₉N = (Li⁺ • C₃H₉N)

C₃H₁₀N⁺ +  = (C₃H₁₀N⁺ • )

By formula: C₃H₁₀N⁺ + C₃H₉N = (C₃H₁₀N⁺ • C₃H₉N)

C₃H₉Sn⁺ +  = (C₃H₉Sn⁺ • )

By formula: C₃H₉Sn⁺ + C₃H₉N = (C₃H₉Sn⁺ • C₃H₉N)

Free energy of reaction

(C₃H₁₀N⁺ •  • ) +  = (C₃H₁₀N⁺ • 2 • )

By formula: (C₃H₁₀N⁺ • H₂O • C₃H₉N) + H₂O = (C₃H₁₀N⁺ • 2H₂O • C₃H₉N)

Free energy of reaction

 +  = ( • )

By formula: K⁺ + C₃H₉N = (K⁺ • C₃H₉N)

C₃H₈N^- +  =

By formula: C₃H₈N^- + H⁺ = C₃H₉N

(C₃H₁₀N⁺ • ) +  = (C₃H₁₀N⁺ •  • )

By formula: (C₃H₁₀N⁺ • C₃H₉N) + CH₄O = (C₃H₁₀N⁺ • CH₄O • C₃H₉N)

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

(C₃H₁₀N⁺ • 2) +  = (C₃H₁₀N⁺ •  • 2)

By formula: (C₃H₁₀N⁺ • 2C₃H₉N) + H₂O = (C₃H₁₀N⁺ • H₂O • 2C₃H₉N)

Bond type: Hydrogen bond (positive ion to hydride)

(C₃H₁₀N⁺ •  • ) +  = (C₃H₁₀N⁺ • 2 • )

By formula: (C₃H₁₀N⁺ • CH₄O • C₃H₉N) + CH₄O = (C₃H₁₀N⁺ • 2CH₄O • C₃H₉N)

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

(C₃H₁₀N⁺ •  • ) +  = (C₃H₁₀N⁺ • 2 • )

By formula: (C₃H₁₀N⁺ • C₃H₉N • H₂O) + C₃H₉N = (C₃H₁₀N⁺ • 2C₃H₉N • H₂O)

(C₃H₁₀N⁺ • 2) +  = (C₃H₁₀N⁺ • 3)

By formula: (C₃H₁₀N⁺ • 2C₃H₉N) + C₃H₉N = (C₃H₁₀N⁺ • 3C₃H₉N)

(C₃H₁₀N⁺ • 3) +  = (C₃H₁₀N⁺ • 4)

By formula: (C₃H₁₀N⁺ • 3C₃H₉N) + C₃H₉N = (C₃H₁₀N⁺ • 4C₃H₉N)

(C₃H₁₀N⁺ • 4) +  = (C₃H₁₀N⁺ • 5)

By formula: (C₃H₁₀N⁺ • 4C₃H₉N) + C₃H₉N = (C₃H₁₀N⁺ • 5C₃H₉N)

(C₃H₁₀N⁺ • 5) +  = (C₃H₁₀N⁺ • 6)

By formula: (C₃H₁₀N⁺ • 5C₃H₉N) + C₃H₉N = (C₃H₁₀N⁺ • 6C₃H₉N)

 +  = ( • )

By formula: Na⁺ + C₃H₉N = (Na⁺ • C₃H₉N)

Free energy of reaction

(C₃H₁₀N⁺ • ) +  = (C₃H₁₀N⁺ • 2)

By formula: (C₃H₁₀N⁺ • C₃H₉N) + C₃H₉N = (C₃H₁₀N⁺ • 2C₃H₉N)

2 =  + 

By formula: 2C₂H₇N = CH₅N + C₃H₉N

Gas phase ion energetics 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 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
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

Ionization energy determinations

Appearance energy determinations

De-protonation reactions

C₃H₈N^- +  =

By formula: C₃H₈N^- + H⁺ = C₃H₉N

Ion clustering 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:
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
RCD - Robert C. Dunbar

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. Searches may be limited to ion clustering reactions. A general reaction search form is also available.

Clustering reactions

C₃H₉Sn⁺ +  = (C₃H₉Sn⁺ • )

By formula: C₃H₉Sn⁺ + C₃H₉N = (C₃H₉Sn⁺ • C₃H₉N)

Free energy of reaction

C₃H₁₀N⁺ +  = (C₃H₁₀N⁺ • )

By formula: C₃H₁₀N⁺ + C₃H₉N = (C₃H₁₀N⁺ • C₃H₉N)

(C₃H₁₀N⁺ • ) +  = (C₃H₁₀N⁺ • 2)

By formula: (C₃H₁₀N⁺ • C₃H₉N) + C₃H₉N = (C₃H₁₀N⁺ • 2C₃H₉N)

(C₃H₁₀N⁺ • 2) +  = (C₃H₁₀N⁺ • 3)

By formula: (C₃H₁₀N⁺ • 2C₃H₉N) + C₃H₉N = (C₃H₁₀N⁺ • 3C₃H₉N)

(C₃H₁₀N⁺ • 3) +  = (C₃H₁₀N⁺ • 4)

By formula: (C₃H₁₀N⁺ • 3C₃H₉N) + C₃H₉N = (C₃H₁₀N⁺ • 4C₃H₉N)

(C₃H₁₀N⁺ • 4) +  = (C₃H₁₀N⁺ • 5)

By formula: (C₃H₁₀N⁺ • 4C₃H₉N) + C₃H₉N = (C₃H₁₀N⁺ • 5C₃H₉N)

(C₃H₁₀N⁺ • 5) +  = (C₃H₁₀N⁺ • 6)

By formula: (C₃H₁₀N⁺ • 5C₃H₉N) + C₃H₉N = (C₃H₁₀N⁺ • 6C₃H₉N)

(C₃H₁₀N⁺ •  • ) +  = (C₃H₁₀N⁺ • 2 • )

By formula: (C₃H₁₀N⁺ • C₃H₉N • H₂O) + C₃H₉N = (C₃H₁₀N⁺ • 2C₃H₉N • H₂O)

 +  = ( • )

By formula: K⁺ + C₃H₉N = (K⁺ • C₃H₉N)

 +  = ( • )

By formula: Li⁺ + C₃H₉N = (Li⁺ • C₃H₉N)

 +  = ( • )

By formula: Na⁺ + C₃H₉N = (Na⁺ • C₃H₉N)

Free energy of reaction

IR Spectrum

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Data compiled by: Coblentz Society, Inc.

• GAS (100 mmHg, N2 ADDED, TOTAL PRESSURE 600 mmHg); DOW KBr FOREPRISM-GRATING; DIGITIZED BY COBLENTZ SOCIETY (BATCH II) FROM HARD COPY; 2 cm^-1 resolution

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

• gas

References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, 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
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Swift and Hochanadel, 1945
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Woodin and Beauchamp, 1978
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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]

Staley and Beauchamp, 1975
Staley, R.H.; Beauchamp, J.L., Intrinsic Acid - Base Properties of Molecules. Binding Energies of Li+ to pi - and n - Donor Bases, J. Am. Chem. Soc., 1975, 97, 20, 5920, https://doi.org/10.1021/ja00853a050 . [all data]

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Wei, Tzeng, et al., 1991
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Schafer, W.; Schweig, A., Zur Konjugation in aromatischen Aminen und Phosphanen, Angew. Chem., 1972, 84, 898. [all data]

Lloyd and Lynaugh, 1972
Lloyd, D.R.; Lynaugh, N., Photoelectron studies of boron compounds. Part 3. Complexes of borane with Lewis bases, J. Chem. Soc. Faraday Trans. 2, 1972, 68, 947. [all data]

Cradock, Ebsworth, et al., 1972
Cradock, S.; Ebsworth, E.A.V.; Savage, W.J.; Whiteford, R.A., Photoelectron spectra of some methyl, silyl and germyl amines, phosphines and arsines, J. Chem. Soc. Faraday Trans. 2, 1972, 68, 934. [all data]

SenSharma and Franklin, 1973
SenSharma, D.K.; Franklin, J.L., Heat of formation of free radicals by mass spectrometry, J. Am. Chem. Soc., 1973, 95, 6562. [all data]

Gowenlock, Jones, et al., 1961
Gowenlock, B.G.; Jones, P.P.; Majer, J.R., Bond dissociation energies in some molecules containing alkyl substituted CH₃, NH₂, and OH, J. Chem. Soc. Faraday Trans., 1961, 57, 23. [all data]

Loudon and Webb, 1977
Loudon, A.G.; Webb, K.S., The nature of the [C₂H₆N]⁺ and [CH₄N]⁺ ions formed by electron impact on methylated formamides, acetamides, ureas, thioureas and hexamethylphosphoramide, Org. Mass Spectrom., 1977, 12, 283. [all data]

Solka and Russell, 1974
Solka, B.H.; Russell, M.E., Energetics of formation of some structural isomers of gaseous C₂H₅O⁺ C₂H₆N⁺ ions, J. Phys. Chem., 1974, 78, 1268. [all data]

Fisher and Henderson, 1967
Fisher, I.P.; Henderson, E., Mass spectrometry of free radicals, J. Chem. Soc. Faraday Trans., 1967, 63, 1342. [all data]

Lossing, Lam, et al., 1981
Lossing, F.P.; Lam, Y.-T.; Maccoll, A., Gas phase heats of formation of alkyl immonium ions, Can. J. Chem., 1981, 59, 2228. [all data]

Taft, Martin, et al., 1965
Taft, R.W.; Martin, R.H.; Lampe, F.W., Stabilization energies of substituted methyl cations. The effect of strong demand on the resonance order, J. Am. Chem. Soc., 1965, 87, 2490. [all data]

Notes

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• Symbols used in this document:
  

  AE	Appearance energy
  Cp,liquid	Constant pressure heat capacity of liquid
  IE (evaluated)	Recommended ionization energy
  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
  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
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