IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Acetonitrile with Sulfides

Components:
   (1) Acetonitrile; C2H3N; [75-05-8]  NIST Chemistry WebBook for detail
   (2) Sulfides; C4H8S - C13H26S; []  NIST Chemistry WebBook for detail

Original Measurements:
   Obolentsev, R.D.; Lebedeva, M.N.; Kreis, E.A.; Lyapina, N.K.; Parphenova, M.A., Neftekhimiya11, 893-901 (1971).

Variables:
   Temperature = 207 K to 450 K

Prepared By:
   Valerii P. Sazonov

Experimental Data:   (Notes on the Nomenclature)

Upper critical solution temperatures of the binary systems acetonitrile (1) + sulfide (2)
t/°C	T/K	Final Temperature (T_Fin)	Chemical Name
-66	207	120.05	2,2’-Thiobispropane; C6H14S; [625-80-9]
-65	208	118.5	1-(Ethylthio)propane; C5H12S; [4110-50-3]
-61	212	81/1.60	(Ethylthio)benzene; C8H10S; [622-38-8]
-61	212	215-218	(Propylthio)benzene: C9H12S; [874-79-3]
-48	225	142.8	1,1’-Thiobispropane; C6H14S; [111-47-7]
-480	225	162.5/2.40	1,1’-Thiobisbenzene; C12H10S; [139-66-2]
-5.0	268.2	188.9	1,1’-Thiobisbutane; C8H18S; [544-40-1]
-5.0	268.2	170.8	2,2’-Thiobisbutane; C8H18S; [626-26-6]
63..0	336.2	194.2	(Methylthio)benzene; C7H8S; [100-68-5]
82.0	355.2	-	1,1’-Thiobisheptane; C14H30S; [629-65-2]
177.0	450.2	m. p. = 61.5	1,1’-Thiobisoctadecane; C36H74S; [1844-09-3]

Method/Apparatus/Procedure:
   The synthetic method was used. Samples of (1) and (2) of weight about 0.2 g were placed in glass ampoules of length 3 to 4 cm and inner diameter of 4 mm. After cooling in a mixture of ice with salt ampoules were sealed. Three to four ampoules were attached to a thermometer and placed in a glass bath with glycerine (for heating) or with acetone and solid CO₂ (for cooling) with continuous stirring. The heating and cooling 2 K per minute. The UCST was determined by following the appearance and disappearance of the meniscus.

Source and Purity of Materials:
   (1) Source not specified; purity not specified; dried and purified; boiling point = 81.6 °C, n(20 °C, D) = 1.3458.
   (2) Synthesized in Institute of Chemistry (Upha, Russia).

Estimated Errors:

   Temperature: ± 0.1 K (243 K to 373 K); ± 0.3 (above 373 K); ± 0.5 K (below 243 K).