Diazene, bis(4-butoxyphenyl)-, 1-oxide
- Formula: C20H26N2O3
- Molecular weight: 342.4320
- IUPAC Standard InChI: InChI=1S/C20H26N2O3/c1-3-5-15-24-19-11-7-17(8-12-19)21-22(23)18-9-13-20(14-10-18)25-16-6-4-2/h7-14H,3-6,15-16H2,1-2H3
- IUPAC Standard InChIKey: DWRXFZDFCLDVQG-UHFFFAOYSA-N
- CAS Registry Number: 17051-01-3
- Chemical structure:
This structure is also available as a 2d Mol file - Other names: Azoxy-bis-(p-n-butoxybenzene)
- Permanent link for this species. Use this link for bookmarking this species for future reference.
- Information on this page:
- Other data available:
- Options:
Data at NIST subscription sites:
NIST subscription sites provide data under the NIST Standard Reference Data Program, but require an annual fee to access. The purpose of the fee is to recover costs associated with the development of data collections included in such sites. Your institution may already be a subscriber. Follow the links above to find out more about the data in these sites and their terms of usage.
Phase change data
Go To: Top, References, Notes
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 |
|---|---|---|---|---|---|
| Ttriple | 377.2 | K | N/A | Parkhomenko, Pivovarov, et al., 1990 | Nemactic liquid crystal phase; Uncertainty assigned by TRC = 0.8 K; meas. in Calvet microcalorimter, DAK-1; TRC |
| Ttriple | 375.2 | K | N/A | Arnold, 1964 | Smectic liquid crystal phase; Uncertainty assigned by TRC = 0.1 K; TRC |
Enthalpy of phase transition
| ΔHtrs (kcal/mol) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 2.4952 | 315.5 | crystaline, IV | crystaline, III | Bamezai, Godlewska, et al., 1990 | DH |
| 0.222 | 323.4 | crystaline, III | crystaline, II | Bamezai, Godlewska, et al., 1990 | DH |
| 0.3752 | 360.5 | crystaline, II | crystaline, I | Bamezai, Godlewska, et al., 1990 | DH |
| 5.0096 | 376.7 | crystaline, I | liquid | Bamezai, Godlewska, et al., 1990 | c,I to nematic liquid.; DH |
Entropy of phase transition
| ΔStrs (cal/mol*K) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 7.909 | 315.5 | crystaline, IV | crystaline, III | Bamezai, Godlewska, et al., 1990 | DH |
| 0.688 | 323.4 | crystaline, III | crystaline, II | Bamezai, Godlewska, et al., 1990 | DH |
| 1.04 | 360.5 | crystaline, II | crystaline, I | Bamezai, Godlewska, et al., 1990 | DH |
| 13.30 | 376.7 | crystaline, I | liquid | Bamezai, Godlewska, et al., 1990 | c,I; DH |
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.
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, References
- Symbols used in this document:
Ttriple Triple point temperature ΔHtrs Enthalpy of phase transition ΔStrs Entropy of phase transition - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
- The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
- Customer support for NIST Standard Reference Data products.