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Diazene, bis(1,1-dimethylethyl)-

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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

Quantity Value Units Method Reference Comment
Deltafgas-36.4 ± 2.8kJ/molCcbMontgomery, Engel, et al., 1978see Engel, Melaugh, et al., 1976, and Engel, Wood, et al., 1974
Deltafgas-35.6 ± 3.6kJ/molCmEngel, 1976 

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
Deltafliquid-75.5 ± 2.7kJ/molCcbMontgomery, Engel, et al., 1978see Engel, Melaugh, et al., 1976, and Engel, Wood, et al., 1974
Deltafliquid-74.7 ± 3.6kJ/molCmEngel, 1976 
Quantity Value Units Method Reference Comment
Deltacliquid-5645.1 ± 2.5kJ/molCcbMontgomery, Engel, et al., 1978see Engel, Melaugh, et al., 1976, and Engel, Wood, et al., 1974

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

Quantity Value Units Method Reference Comment
Tboil382. - 383.KN/ABuckingham and Donaghy, 1982BS
Quantity Value Units Method Reference Comment
Tfus258.6KN/AByström, 1980Crystal phase 1 phase; Uncertainty assigned by TRC = 1. K; TRC
Quantity Value Units Method Reference Comment
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) Reference Comment
320. - 323.0.11Buckingham and Donaghy, 1982BS

Enthalpy of vaporization

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

Enthalpy of fusion

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

Enthalpy of phase transition

DeltaHtrs (kJ/mol) Temperature (K) Initial Phase Final Phase Reference Comment
4.890242.6crystaline, IIcrystaline, IBystroem, 1980DH
10.280258.6crystaline, I Bystroem, 1980DH

Entropy of phase transition

DeltaStrs (J/mol*K) Temperature (K) Initial Phase Final Phase Reference Comment
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:


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 compiled as indicated in comments:
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi

Ionization energy determinations

IE (eV) Method Reference Comment
8.2 ± 0.2PEBock, Wittel, et al., 1976Vertical value; LLK
8.20PEHouk, Chang, et al., 1975Vertical value; LLK

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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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 KONINKLIJKE SHELL LABORATORIUM AMSTERDAM
NIST MS number 3875

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References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Gas phase ion energetics data, Mass spectrum (electron ionization), NIST Free Links, Notes

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

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]

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, https://doi.org/10.1039/f19807601986 . [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]

Bock, Wittel, et al., 1976
Bock, H.; Wittel, K.; Veith, M.; Wiberg, N., Photoelectron spectra and molecular properties. L.1-3 On the blue color of bis(trimethylsilyl)diimine, J. Am. Chem. Soc., 1976, 98, 109. [all data]

Houk, Chang, et al., 1975
Houk, K.N.; Chang, Y.-M.; Engel, P.S., Photoelectron spectroscopy of azo compounds, J. Am. Chem. Soc., 1975, 97, 1824. [all data]


Notes

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