IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Nitromethane with Tetraalkylammonium iodides

Components:
   (1) Nitromethane; CH3NO2; [75-52-5]  NIST Chemistry WebBook for detail
   (2) Tetraalkylammonium iodides; ; []  NIST Chemistry WebBook for detail

Original Measurements:
   Walden, P., Z. Phys. Chem. 55, 683-720 (1906).

Variables:
   Temperature = 273 K and 298 K

Prepared By:
   V. P. Sazonov

Experimental Data:   (Notes on the Nomenclature)

Solubility of tetraalkylammonium iodides in nitromethane
t/°C	T/K	Chemical Name	10² * Mass Fraction w₂	Mole Fraction x₂ (compiler)
0.0	273.2	Tetramethylammonium iodide; C4H12IN; [75-58-1]	0.221	0.0007
25.0	298.2	Tetramethylammonium iodide; C4H12IN; [75-58-1]	0.297	0.0009
0.0	273.2	Tetraethylammonium iodide; C8H20IN; [68-05-3]	3.002	0.0073
25.0	298.2	Tetraethylammonium iodide; C8H20IN; [68-05-3]	4.887	0.0212
0.0	273.2	Tetrapropylammonium iodide; C12H28IN; [631-40-3]	12.52	0.0272
25.0	298.2	Tetrapropylammonium iodide; C12H28IN; [631-40-3]	19.21	0.0443

Method/Apparatus/Procedure:
    The analytical method was used. Method A: 10 to 20 mL of (1) and an appropriate amount of fine dry salt were placed into a glass retort in a thermostat and stirred for many hours. Aliquots of the saturated solution were taken by pipette for titration. Method B: 15-25 mL of (1) and finely divided salt were equilibrated at 40 °C with intensive stirring for 1 h. The flask was then placed into a thermostat (25 or 0 °C) and stirred for 2 h. After this, stirring was halted and the flask kept at the given temperature for 17-18 h. 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.
   Pressure: Not reported.