Urea, tetramethyl-

• Formula: C₅H₁₂N₂O
• Molecular weight: 116.1616
• IUPAC Standard InChI: InChI=1S/C5H12N2O/c1-6(2)5(8)7(3)4/h1-4H3 Copy

  
• IUPAC Standard InChIKey: AVQQQNCBBIEMEU-UHFFFAOYSA-N Copy
• CAS Registry Number: 632-22-4
• Chemical structure:
  This structure is also available as a 2d Mol file or as a computed 3d SD file
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• Other names: Temur; Tetramethylurea; ((CH3)2N)2CO; 1,1,3,3-Tetramethylurea; TMU; Urea, 1,1,3,3-tetramethyl-; Tetramethyluree; N,N,N',N'-Tetramethylurea; NSC 91488; Urea, N,N,N',N'-tetramethyl-
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• Information on this page:
  • Gas phase thermochemistry data
  • Condensed phase thermochemistry data
  • Phase change data
  • IR Spectrum
  • Mass spectrum (electron ionization)
  • References
  • Notes
• Other data available:
  • Gas phase ion energetics data
  • UV/Visible spectrum
• Data at other public NIST sites:
  • Gas Phase Kinetics Database
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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:
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
AC - William E. Acree, Jr., James S. Chickos
DH - Eugene S. Domalski and Elizabeth D. Hearing

Enthalpy of vaporization

Enthalpy of fusion

Entropy of fusion

IR Spectrum

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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

Gas Phase Spectrum

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Additional Data

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

References

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

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

Kabo, Miroshnichenko, et al., 1990
Kabo, G.Ya.; Miroshnichenko, E.A.; Frenkel, M.L.; Kozyro, A.A.; Simirskii, V.V.; Krasulin, A.P.; Vorob'eva, V.P.; Lebedev, Yu.A., Thermochemistry of urea alkyl derivatives, Bull. Acad. Sci. USSR, Div. Chem. Sci., 1990, 662-667. [all data]

Simirsky, Kabo, et al., 1987
Simirsky, V.V.; Kabo, G.J.; Frenkel, M.L., Additivity of the enthalpies of formation of urea derivatives in the crystalline state, J. Chem. Thermodyn., 1987, 19, 1121-1127. [all data]

Kozyro, Krasulin, et al., 1988
Kozyro, A.A.; Krasulin, A.P.; Simirskii, V.V.; Markovnik, V.S., Thermodynamic properties of tetramethylurea, Russ. J. Phys. Chem. (Engl. Transl.), 1988, 62, 895-897. [all data]

Kozyro, Krasulin, et al., 1988, 2
Kozyro, A.A.; Krasulin, A.P.; Simirskii, V.V.; Markovnik, V.S., Thermodynamic properties of tetramethylurea, Zhur. Fiz. Khim., 1988, 62, 1747-1751. [all data]

Weast and Grasselli, 1989
CRC Handbook of Data on Organic Compounds, 2nd Editon, Weast,R.C and Grasselli, J.G., ed(s)., CRC Press, Inc., Boca Raton, FL, 1989, 1. [all data]

Kozyro, Krasulin, et al., 1988, 3
Kozyro, A.A.; Krasulin, A.P.; Simirsky, V.V.; Markovnik, V.S., Thermodynamic properties of tetramethylurea, Zh. Fiz. Khim., 1988, 62, 1747-52. [all data]

Zordan, Hurkot, et al., 1972
Zordan, T.A.; Hurkot, D.G.; Peterson, M.; Hepler, L.G., Enthalpies and entropies of melting from differential scanning calorimetry and freezing point depressions: urea, methylurea, 1, 1-dimethylurea, 1, 3- dimethylurea, tetramethylurea, and thiourea, Thermochim. Acta, 1972, 5, 21. [all data]

Kabo, Kozyro, et al., 1995
Kabo, G.Ya.; Kozyro, A.A.; Diky, V.V.; Simirsky, V.V., Additivity of Thermodynamic Properties of Organic Compounds in Crystalline State. 2. Heat Capacities and Enthalpies of Phase Transition of Alkyl Derivatives of Urea in Crystalline State, J. Chem. Eng. Data, 1995, 40, 371-93. [all data]

Kneisl and Zondlo, 1987
Kneisl, Philip; Zondlo, John W., Vapor pressure, liquid density, and the latent heat of vaporization as functions of temperature for four dipolar aprotic solvents, J. Chem. Eng. Data, 1987, 32, 1, 11-13, https://doi.org/10.1021/je00047a003 . [all data]

Jamróz, Dobrowolski, et al., 2001
Jamróz, Malgorzata E.; Dobrowolski, Jan Cz.; Polaczek, Jerzy; Szafranski, Andrzej M.; Kazimirski, Jan K.; Lisicki, Zygmunt, (Solid + liquid) equilibria, i.r., and semi-empirical studies of carbazole with selected tertiary amides, The Journal of Chemical Thermodynamics, 2001, 33, 5, 565-579, https://doi.org/10.1006/jcht.2000.0770 . [all data]

Kabo, Kozyro, et al., 1995, 2
Kabo, Gennady J.; Kozyro, Alexander A.; Diky, Vladimir V.; Simirsky, Vladimir V., Additivity of Thermodynamic Properties of Organic Compounds in Crystalline State. 2. Heat Capacities and Enthalpies of Phase Transition of Alkyl Derivatives of Urea in Crystalline State, J. Chem. Eng. Data, 1995, 40, 2, 371-393, https://doi.org/10.1021/je00018a005 . [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]

Notes

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

• Symbols used in this document:
  

  Cp,liquid	Constant pressure heat capacity of liquid
  Tboil	Boiling point
  Tfus	Fusion (melting) point
  Ttriple	Triple point temperature
  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
  ΔvapH	Enthalpy of vaporization
  ΔvapH°	Enthalpy of vaporization at standard conditions

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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