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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
Phenothiazine with Phenoxanthiin
Components:
(1) Phenothiazine; C12H9NS; [92-84-2]
NIST Chemistry WebBook
for detail
(2) Phenoxanthiin; C12H8OS; [262-20-4]
NIST Chemistry WebBook
for detail
Original Measurements:
Cullinane, N.M.; Rees, W.T., Trans. Faraday Soc. 1940, 36, 506-514.
Variables:
Temperature = Temperature
Prepared By:
W.E. Acree, Jr.
Experimental Data:
(Notes on the Nomenclature)
Initial Temperature (T
In
)
Final Temperature (T
Fin
)
Mole Fraction x
1
Mole Fraction x
2
328.9
328.5
0.000
1.000
360.5
330.8
0.113
0.887
396.8
335.5
0.292
0.708
425.0
344.1
0.537
0.463
437.0
352.6
0.661
0.339
449.1
373.5
0.832
0.168
456.5
413.4
0.972
0.028
457.6
456.8
1.000
0.000
Notes:
a
Phase diagram, given in the original paper, shows formation of a complete series of solid solutions. Melting points of binary mixtures lie between those of the two pure components. T
in
refers to the temperature at which crystallization begins; T
fin
is the temperature at which crystallization of the solid solution concludes.
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:
(1) Purity and chemical source were not specified in paper, was sublimed and recrystallized from alcohol.
(2) Synthesized by the authors, was purified by sublimation and recrystallized from alcohol.
Estimated Errors:
Temperature: T/K: ± precision 0.2 (compiler). x
1
: ± 0.002 (compiler).