Diazene, bis(4-butoxyphenyl)-, 1-oxide

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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:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
DH - Eugene S. Domalski and Elizabeth D. Hearing

Quantity Value Units Method Reference Comment
Ttriple377.2KN/AParkhomenko, Pivovarov, et al., 1990Nemactic liquid crystal phase; Uncertainty assigned by TRC = 0.8 K; meas. in Calvet microcalorimter, DAK-1; TRC
Ttriple375.2KN/AArnold, 1964Smectic liquid crystal phase; Uncertainty assigned by TRC = 0.1 K; TRC

Enthalpy of phase transition

ΔHtrs (kJ/mol) Temperature (K) Initial Phase Final Phase Reference Comment
10.440315.5crystaline, IVcrystaline, IIIBamezai, Godlewska, et al., 1990DH
0.930323.4crystaline, IIIcrystaline, IIBamezai, Godlewska, et al., 1990DH
1.570360.5crystaline, IIcrystaline, IBamezai, Godlewska, et al., 1990DH
20.960376.7crystaline, IliquidBamezai, Godlewska, et al., 1990c,I to nematic liquid.; DH

Entropy of phase transition

ΔStrs (J/mol*K) Temperature (K) Initial Phase Final Phase Reference Comment
33.09315.5crystaline, IVcrystaline, IIIBamezai, Godlewska, et al., 1990DH
2.88323.4crystaline, IIIcrystaline, IIBamezai, Godlewska, et al., 1990DH
4.36360.5crystaline, IIcrystaline, IBamezai, Godlewska, et al., 1990DH
55.64376.7crystaline, IliquidBamezai, Godlewska, et al., 1990c,I; DH

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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

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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-4455
NIST MS number 232965

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References

Go To: Top, Phase change data, 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.

Parkhomenko, Pivovarov, et al., 1990
Parkhomenko, V.D.; Pivovarov, A.A.; Sytnik, S.V., Thermophysical properties of oxamide, Izv. Vyssh. Uchebn. Zaved., Khim. Khim. Tekhnol., 1990, 33, 6, 53-5. [all data]

Arnold, 1964
Arnold, H., Calorimetry of crystalline-liquid materials: II results of the measurements on 12 homologous dialkoxy azeoxy benzenes, Z. Phys. Chem. (Leipzig), 1964, 226, 146. [all data]

Bamezai, Godlewska, et al., 1990
Bamezai, R.K.; Godlewska, M.; Massalska-arodz, M.; Sciesinski, J.; Witko, W., The adiabatic calorimetry study of the polymorphism of solid 4,4'-di-n-butyloxyazoxybenzene, Phase Transitions, 1990, 27(2-3), 113-119. [all data]


Notes

Go To: Top, Phase change data, Mass spectrum (electron ionization), References