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Urea, N,N'-diphenyl-

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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 by: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Quantity Value Units Method Reference Comment
Deltafsolid-116.8 ± 4.4kJ/molCcbSimirsky, Kabo, et al., 1987Heat of combustion is not reported

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
AC - William E. Acree, Jr., James S. Chickos
DH - Eugene S. Domalski and Elizabeth D. Hearing

Quantity Value Units Method Reference Comment
Tboil535.2KN/AWeast and Grasselli, 1989BS
Quantity Value Units Method Reference Comment
Tfus512.1KN/AFerro and DellaGatta, 1987Uncertainty assigned by TRC = 3. K; TRC
Tfus510.15KN/ASabatier and Mailhe, 1909Uncertainty assigned by TRC = 2. K; TRC

Enthalpy of sublimation

DeltasubH (kJ/mol) Temperature (K) Method Reference Comment
152. ± 6.445. - 484.TEFerro and Della Gatta, 1987AC

Enthalpy of fusion

DeltafusH (kJ/mol) Temperature (K) Method Reference Comment
34.620512.1N/AFerro and Della Gatta, 1987DH
34.62512.1N/ADomalski and Hearing, 1996See also Acree, 1991.; AC

Entropy of fusion

DeltafusS (J/mol*K) Temperature (K) Reference Comment
66.5512.1Ferro and Della Gatta, 1987DH

In addition to the Thermodynamics Research Center (TRC) data available from this site, much more physical and chemical property data is available from the following TRC products:


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 by: 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

Urea, N,N'-diphenyl- = Benzene, isocyanato- + Aniline

By formula: C13H12N2O = C7H5NO + C6H7N

Quantity Value Units Method Reference Comment
Deltar181.7 ± 4.2kJ/molEqkChimishkyan, Svetlova, et al., 1984solid phase; Dissociation

Benzene, isocyanato- + Aniline = Urea, N,N'-diphenyl-

By formula: C7H5NO + C6H7N = C13H12N2O

Quantity Value Units Method Reference Comment
Deltar-89.1 ± 5.1kJ/molCmPannone and Macosko, 1987liquid phase

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: Coblentz Society, Inc.

Spectrum

A digitized version of this spectrum is not currently available.

Additional Data

View scan of original (hardcopy) spectrum.

Owner COBLENTZ SOCIETY
Collection (C) 2018 copyright by the U.S. Secretary of Commerce
on behalf of the United States of America. All rights reserved.
Source reference COBLENTZ NO. 4004
Date Not specified, most likely prior to 1970
Instrument Not specified, most likely a prism, grating, or hybrid spectrometer.
Data processing (NO SPECTRUM, ONLY SCANNED IMAGE IS AVAILABLE)

This IR spectrum is from the Coblentz Society's evaluated infrared reference spectra collection.


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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Mass spectrum
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Additional Data

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Owner NIST Mass Spectrometry Data Center
Collection (C) 2014 copyright by the U.S. Secretary of Commerce
on behalf of the United States of America. All rights reserved.
Origin Japan AIST/NIMC Database- Spectrum MS-NW- 416
NIST MS number 228199

All mass spectra in this site (plus many more) are available from the NIST/EPA/NIH Mass Spectral Library. Please see the following for information about the library and its accompanying search program.


UV/Visible 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: Victor Talrose, Alexander N. Yermakov, Alexy A. Usov, Antonina A. Goncharova, Axlexander N. Leskin, Natalia A. Messineva, Natalia V. Trusova, Margarita V. Efimkina

Spectrum

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UVVis spectrum
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Additional Data

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Source Lang (editor), 1963
Owner INEP CP RAS, NIST OSRD
Collection (C) 2007 copyright by the U.S. Secretary of Commerce
on behalf of the United States of America. All rights reserved.
Origin INSTITUTE OF ENERGY PROBLEMS OF CHEMICAL PHYSICS, RAS
Source reference RAS UV No. 19661
Instrument Beckman DU
Melting point 237

References

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

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

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]

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]

Ferro and DellaGatta, 1987
Ferro, D.; DellaGatta, G., Enthalpies of Subl. and Fusion of Monophenyl and Diphenyl-1,3-urea, Thermochim. Acta, 1987, 122, 189. [all data]

Sabatier and Mailhe, 1909
Sabatier, P.; Mailhe, A., New Applications of the General Method of Hydrogenation with Various Metals, Ann. Chim. Phys., 1909, 16, 70. [all data]

Ferro and Della Gatta, 1987
Ferro, D.; Della Gatta, G., Enthalpies of sublimation and fusion of monophenylurea and diphenyl-1,3-urea, Thermochim. Acta, 1987, 122, 189-195. [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]

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]

Chimishkyan, Svetlova, et al., 1984
Chimishkyan, A.L.; Svetlova, L.P.; Leonova, T.V.; Gluyaev, N.D., Thermal decomposition of substituted ureas, J. Gen. Chem. USSR, 1984, 54, 1317-1320. [all data]

Pannone and Macosko, 1987
Pannone, M.C.; Macosko, C.W., Kinetics of isocyanate amine reactions, J. Appl. Polym. Sci., 1987, 34, 2409-2432. [all data]

Lang (editor), 1963
Lang (editor), L., Absorption Spectra in the Ultraviolet and Visible Region, 1963, 4, 127. [all data]


Notes

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