IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Nitromethane with Unsaturated fatty acids

Components:
   (1) Nitromethane; CH3NO2; [75-52-5]  NIST Chemistry WebBook for detail
   (2) Unsaturated fatty acids; C16H26O2 - C24H46O2; []  NIST Chemistry WebBook for detail

Original Measurements:
   H.H.O. Schmid; Mangold, H.K.; Lundberg, W.O., Microchem. J. 7, 287-96 (1963).

Variables:
   Temperature = 318 K to 398 K

Prepared By:
   V. P. Sazonov

Experimental Data:   (Notes on the Nomenclature)

Upper critical solution temperatures of the systems nitromethane + unsaturated fatty acid
t/°C	T/K	Chemical Name
44.5	317.7	Docosahexaenoic acid; C22H32O2; [25167-62-8]
46.0	319.2	Hexadecatrienoic acid; C16H26O2; [29428-96-4]
46.5	319.7	Eicosapentaenoic acid; C20H30O2; [25378-27-2]
64.0	337.2	9,12,15-Octadecatrienoic acid; C18H30O2; [463-40-1]
64.5	337.7	Eicosatetraenoic acid; C20H32O2; [506-32-1]
66.0	339.2	Hexadecadienoic acid; C16H28O2; [28933-88-2]
80.0	353.2	9,12-Octadecadienoic acid; C18H32O2; [60-33-3]
84.0	357.2	9-Hexadecenoic acid; C16H30O2; [373-49-9]
96.0	369.2	6-Octadecenoic acid; C18H34O2; [593-39-5]
96.5	369.7	cis-9-Octadecenoic acid; C18H34O2; [112-80-1]
100.0	373.2	trans-9-Octadecenoic acid; C18H34O2; [112-79-8]
106.0	379.2	11-Eicosenoic acid; C20H38O2; [5561-99-9]
116.0	389.2	13-Docosenoic acid; C22H42O2; [112-86-7]
125.0	398.2	15-Tetracosenoic acid; C24H46O2; [506-37-6]

Method/Apparatus/Procedure:
   The synthetic method was used. A Reichert microscope, type RCH, with a heating stage was used. A 26 x 38 mm slide was adapted to hold capillaries on the stage. Two glass strips were glued, using water glass, to the slide, leaving a 0.5 mm channel. The slide was then placed in the adjustable device of the heating stage. (1) and (2) were put into capillary tubing (0.2-0.3 mm diameter) by dipping consecutively into both liquids. The height of the liquid was 7-10 mm. Room temperature solids were melted on a glass slide over a microburner. The capillary was sealed at both ends to a length of 30-35 mm, then inserted into the channel on the slide and heated on the stage. The UCST was determined by following the appearance and disappearance of the meniscus.

Source and Purity of Materials:
   (1) Fisher Scientific Co.; certified, No. N-98; n(20 °C,D) = 1.3820, d(20 °C) = 1134 g·L^{1^{.
   (2) Obtained from the Hormel Foundation; purified by gas-liquid partition and thin-layer adsorption chromatography.}} Estimated Errors:

   Temperature: ± 0.5 K.