IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Acetonitrile with Tetraalkylammonium iodides

Components:
   (1) Acetonitrile; C2H3N; [75-05-8]  NIST Chemistry WebBook for detail
   (2) Tetraalkylammonium iodides; C8H20IN and C12H28IN; []  NIST Chemistry WebBook for detail

Original Measurements:
   Walden, P., Z. Phys. Chem. 55, 683 (1906).

Variables:
   Temperature = 273 K and 298 K

Prepared By:
   Valerii P. Sazonov

Experimental Data:   (Notes on the Nomenclature)

Solubility of tetraalkylammonium iodides (2) in acetonitrile (1)
t/°C	T/K	Chemical Name	10² * Mass Fraction w₂	Mole Fraction x₂ (compiler)
0.0	273.2	Tetraethylammonium iodide; C8H20IN; [68-05-3]	2.74	0.0045
25.0	298.2	Tetraethylammonium iodide; C8H20IN; [68-05-3]	3.834	0.0063
0.0	273.2	Tetrapropylammonium iodide; C12H28IN; [631-40-3]	15.24	0.0230
25.0	298.2	Tetrapropylammonium iodide; C12H28IN; [631-40-3]	21.77	0.0352

Method/Apparatus/Procedure:
   The analytical method was used.
Method A: 10 to 20 mL of (1) and an appropriate amount of fine dry salt (2) were placed in a glass retort in a thermostat and stirred for many hours. Aliquots of the saturated solution were taken by pipette for titration. Method B: 15 to 25 mL of (1) and finely divided salt (2) were equilibrated at 40 °C with intensive stirring for an hour. The flask was then placed in a thermostat (25 or 0 °C) and stirred for 2 hours. After this, stirring was halted and the flask kept at the given temperature for 17 to 18 hours. The saturated solutions were then sampled and titrated.

Source and Purity of Materials:
   (1) Not specified.
   (2) Not specified.

Estimated Errors:
   Solubility: Not reported.
   Temperature: Not reported.