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Diazene, bis(1,1-dimethylethyl)-

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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:
BS - R.L. Brown and S.E. Stein
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, M. Frenkel director
ALS - H.Y. Afeefy, J.F. Liebman, and S.E. Stein
DRB - D.R. Burgess
AC - W.E. Acree, Jr., J.S. Chickos
DH - E.S. Domalski and E.D. Hearing

Tboil382. - 383.KN/ABuckingham and Donaghy, 1982BS
Tfus258.6KN/AByström, 1980Crystal phase 1 phase; Uncertainty assigned by TRC = 1. K; TRC
Deltavap39.1 ± 0.3kJ/molCMontgomery, Engel, et al., 1978see Engel, Melaugh, et al., 1976, and Engel, Wood, et al., 1974; ALS
Deltavap39.1kJ/molN/AMontgomery, Engel, et al., 1978DRB
Deltavap39.1 ± 0.3kJ/molCEngel, Melaugh, et al., 1976AC
Deltavap39.1 ± 0.3kJ/molCEngel, 1976ALS
Deltavap39.1kJ/molN/AEngel, 1976DRB

Reduced pressure boiling point

Tboil (K)Pressure (bar)ReferenceComment
320. - 323.0.11Buckingham and Donaghy, 1982BS

Enthalpy of vaporization

DeltavapH (kJ/mol)Temperature (K)MethodReferenceComment
39.6299.UVEngel, Wood, et al., 1974Based on data from 294. - 305. K.; AC

Enthalpy of fusion

DeltafusH (kJ/mol)Temperature (K)ReferenceComment
10.28258.6Byström, 1980AC

Enthalpy of phase transition

DeltaHtrs (kJ/mol)Temperature (K)Initial PhaseFinal PhaseReferenceComment
4.890242.6crystaline, IIcrystaline, IBystroem, 1980DH
10.280258.6crystaline, I Bystroem, 1980DH

Entropy of phase transition

DeltaStrs (J/mol*K)Temperature (K)Initial PhaseFinal PhaseReferenceComment
20.2242.6crystaline, IIcrystaline, IBystroem, 1980DH
39.7258.6crystaline, I Bystroem, 1980DH

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:


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.

Buckingham and Donaghy, 1982
Buckingham, J.; Donaghy, S.M., Dictionary of Organic Compounds: Fifth Edition, Chapman and Hall, New York, 1982, 1. [all data]

Byström, 1980
Byström, Katarina, Solid--solid phase transitions in azoxy compounds, J. Chem. Soc., Faraday Trans. 1, 1980, 76, 0, 1986. [doi:10.1039/f19807601986] [all data]

Montgomery, Engel, et al., 1978
Montgomery, R.L.; Engel, P.S.; Leckonby, R.A.; Rossini, F.D.; Mansson, M.; Szilagyi, S.; Timberlake, J.W., Enthalpies of combustion, vaporization, and formation of 3,3,4,4-tetramethyl-«DELTA»1-1,2-diazetine and di-tert-butyldiazene, J. Chem. Eng. Data, 1978, 131, 129-131. [all data]

Engel, Melaugh, et al., 1976
Engel, P.S.; Melaugh, R.A.; Mansson, M.; Timberlake, J.W.; Garner, A.W.; Rossini, F.D., Thermochemistry of nine diazenes (azo compounds), J. Chem. Thermodyn., 1976, 8, 607-621. [all data]

Engel, Wood, et al., 1974
Engel, P.S.; Wood, J.L.; Sweet, J.A.; Margrave, J.L., Thermochemistry of azoalkanes, J. Am. Chem. Soc., 1974, 96, 2381-2387. [all data]

Engel, 1976
Engel, P.S., Thermochemistry of cyclic 1,2-dialkyldiazenes (azo compounds). The effect of strain energy on thermal lability, J. Am. Chem. Soc., 1976, 98, 1972-19. [all data]

Bystroem, 1980
Bystroem, K., Solid-solid phase transitions in azoxy compounds, J. Chem. Soc., Faraday Trans., 1980, 1 76(9), 1986-1990. [all data]


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