sec-butylurea
- Formula: C5H12N2O
- Molecular weight: 116.1616
- IUPAC Standard InChIKey: CBRSBDUOPJQVMP-UHFFFAOYSA-N
- CAS Registry Number: 689-11-2
- 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: Urea, (1-methylpropyl)-
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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:
AC - William E. Acree, Jr., James S. Chickos
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔsubH° | 101.9 ± 0.5 | kJ/mol | GS | Emel'yanenko, Kabo, et al., 2006 | Based on data from 345. to 394. K.; AC |
Enthalpy of sublimation
ΔsubH (kJ/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
102.4 ± 0.5 | 350. | C | Ribeiro da Silva, Lobo Ferreira, et al., 2009 | AC |
104.3 ± 0.8 | 355. | ME | Zaitsau, Kabo, et al., 2003 | Based on data from 338. to 372. K.; AC |
104.5 ± 0.8 | 350. | ME | Zaitsau, Kabo, et al., 2003 | Based on data from 338. to 372. K.; AC |
106.2 ± 0.9 | 353. | C | Kabo, Miroshnichenko, et al., 1990 | see Simirsky, Kabo, et al., 1987; ALS |
References
Go To: Top, Phase change data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Emel'yanenko, Kabo, et al., 2006
Emel'yanenko, Vladimir N.; Kabo, Gennady J.; Verevkin, Sergey P.,
Measurement and Prediction of Thermochemical Properties: Improved Increments for the Estimation of Enthalpies of Sublimation and Standard Enthalpies of Formation of Alkyl Derivatives of Urea,
J. Chem. Eng. Data, 2006, 51, 1, 79-87, https://doi.org/10.1021/je050230z
. [all data]
Ribeiro da Silva, Lobo Ferreira, et al., 2009
Ribeiro da Silva, Manuel A.V.; Lobo Ferreira, Ana I.M.C.; Moreno, Ana Rita G.,
Experimental thermochemical study of the monochloronitrobenzene isomers,
The Journal of Chemical Thermodynamics, 2009, 41, 1, 109-114, https://doi.org/10.1016/j.jct.2008.07.012
. [all data]
Zaitsau, Kabo, et al., 2003
Zaitsau, Dz; Kabo, G.J.; Kozyro, A.A.; Sevruk, V.M.,
The effect of the failure of isotropy of a gas in an effusion cell on the vapor pressure and enthalpy of sublimation for alkyl derivatives of carbamide,
Thermochimica Acta, 2003, 406, 1-2, 17-28, https://doi.org/10.1016/S0040-6031(03)00231-4
. [all data]
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]
Notes
Go To: Top, Phase change data, References
- Symbols used in this document:
ΔsubH Enthalpy of sublimation ΔsubH° Enthalpy of sublimation at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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