IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Glass Ball as Bullet Solubility System: Acetonitrile with Thiophenes
Components:
   (1) Thiophenes; C4H4S and C8H12S; []  NIST Chemistry WebBook for detail
   (2) Acetonitrile; C2H3N; [75-05-8]  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 = 203 K and 225 K

 Prepared By:
   Valerii P. Sazonov

 Experimental Data:   (Notes on the Nomenclature)
  
Upper critical solution temperatures of the binary systems acetonitrile (1) + thiophene (2)
t/°CT/KFinal Temperature (TFin)Chemical Name
-7020384Thiophene; C4H4S; [110-02-1]
-48225186.62-Butylthiophene; C8H12S; [1455-20-5]
 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: ± 0.5 K (below 243 K).