Compilation - Phenoxazine with Phenothiazine (IUPAC SDS Volume 59)
SDS Volume (2093)
Volume 59. Polycyclic Aromatic Hydrocarbons: Binary Non-aqueous Systems, Part II Solutes F-Z, p None
Original Measurements
Cullinane, N. M.; Rees, W. T.; Trans. Faraday Soc. 1940, 36, 506-514.
Variables:
Room Temp: 413.1- 457.6 $\pu{K}$
Prepared by:
Method/Apparatus/Procedure:
Mixtures were placed in small capillary tubes. Temperature was slowly varied with ample time given for equilibration. Transition temperatures determined by visual observations. Reported temperatures verified by repetitive measurements.
Source and Purity of Materials:
- Synthesized by authors, and was purified by sublimation and recrystallized from alcohol.
- Purity and chemical source were not specified in paper, was sublimed and recrystallized from alcohol.
Estimated Errors:
Ambient temperature: T/K: ±precision 0.2. (compiler). x1: ±0.002 (compiler).
Components:
- Phenoxazine, $\ce{ C12H8NO }$; [135-67-1] NIST WebBook
- Phenothiazine, $\ce{ C12H9NS }$; [92-84-2] NIST WebBook
Experimental Data
| $T$ ($\pu{K}$) | $T$ ($\pu{K}$) | $x_{1}$ | $x_{2}$ |
|---|---|---|---|
| 457.6 | 456.8 | 0.000 | 1.000 |
| 452.0 | 421.5 | 0.118 | 0.882 |
| 449.5 | 416.9 | 0.176 | 0.824 |
| 438.1 | 413.0 | 0.360 | 0.640 |
| 430.1 | 413.6 | 0.483 | 0.517 |
| 415.8 | 413.1 | 0.689 | 0.311 |
| 415.2 | 412.9 | 0.735 | 0.265 |
| 416.7 | 413.2 | 0.744 | 0.256 |
| 424.3 | 413.0 | 0.871 | 0.129 |
| 427.3 | 415.3 | 0.941 | 0.059 |
| 429.9 | 429.2 | 1.000 | 0.000 |
(a) Phase diagram, given in the original paper, shows formation of a partial series of solid solutions having compositions from circa x1 = 0.00 to x1 = 0.22 and from x1 = 0.93 to x1 = 1.00. Tin refers to the temperature at which crystallization begins; Tfin is the temperature at which crystallization of the solid solution concludes.
