IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Nitromethane with 2-Methylhexane

Components:
   (1) 2-Methylhexane; C7H16; [591-76-4]  NIST Chemistry WebBook for detail
   (2) Nitromethane; CH3NO2; [75-52-5]  NIST Chemistry WebBook for detail

Original Measurements:
   Riccardi, R.; Franzosini, P.; Rolla, M., Z. Naturforsch. 23A, 1816-8 (1968); *Ferloni, P.; Riccardi, R., Int. Data Ser., Sel. Data Mixtures, Ser. A (2), 79 (1977).

Variables:
   Temperature = 365 K to 379 K

Prepared By:
   V. P. Sazonov

Experimental Data:   (Notes on the Nomenclature)

Mutual solubility of nitromethane and 2-methylhexane
t/°C	T/K	10² * Mass Fraction w₁ (compiler)	Mole Fraction x₁	Comment(s)
92.0	365.2	-	-	Hydrocarbon-rich phase
92.0	365.2	82.0	0.882	Nitromethane-rich phase
95.5	368.7	-	-	Hydrocarbon-rich phase
95.5	368.7	78.5	0.857	Nitromethane-rich phase
96.6	369.8	-	-	Hydrocarbon-rich phase
96.6	369.8	76.6	0.843	Nitromethane-rich phase
100.0	373.2	26.9	0.376	Hydrocarbon-rich phase
100.0	373.2	-	-	Nitromethane-rich phase
100.8	374.0	-	-	Hydrocarbon-rich phase
100.8	374.0	73.9	0.823	Nitromethane-rich phase
101.6	374.8	28.7	0.398	Hydrocarbon-rich phase
101.6	374.8	-	-	Nitromethane-rich phase
102.4	375.6	31.9	0.435	Hydrocarbon-rich phase
102.4	375.6	-	-	Nitromethane-rich phase
103.3	376.5	-	-	Hydrocarbon-rich phase
103.3	376.5	69.2	0.787	Nitromethane-rich phase
104.1	377.3	-	-	Hydrocarbon-rich phase
104.1	377.3	65.6	0.758	Nitromethane-rich phase
104.3	377.5	34.3	0.462	Hydrocarbon-rich phase
104.3	377.5	-	-	Nitromethane-rich phase
104.6	377.8	38.1	0.503	Hydrocarbon-rich phase
104.6	377.8	-	-	Nitromethane-rich phase
104.7	377.9	-	-	Hydrocarbon-rich phase
104.7	377.9	63.7	0.742	Nitromethane-rich phase
105.4	378.6	-	-	Hydrocarbon-rich phase
105.4	378.6	57.6	0.690	Nitromethane-rich phase
105.5	378.7	-	-	Hydrocarbon-rich phase
105.5	378.7	54.4	0.662	Nitromethane-rich phase
105.5	378.7	50.5	0.626	Hydrocarbon-rich phase
105.5	378.7	-	-	Nitromethane-rich phase
105.6	378.8	43.7	0.560	Hydrocarbon-rich phase
105.6	378.8	-	-	Nitromethane-rich phase
105.8	379.0	45.5	0.578	Hydrocarbon-rich phase
105.8	379.0	-	-	Nitromethane-rich phase
106.2	379.4	48.7	0.609	Hydrocarbon-rich phase
106.2	379.4	-	-	Nitromethane-rich phase
106.1	379.3	51.5	0.635	Hydrocarbon-rich phase
106.1	379.3	51.5 (UCST)	0.635	Nitromethane-rich phase

Method/Apparatus/Procedure:
   The synthetic method¹ was used. Tubes were filled under vacuum with known masses of degassed and moisture-free components, sealed, and then placed in a thermostat bath filled with paraffin oil. The mixtures in the tubes were shaken by a Chemap vibromixer type E-1. Temperatures were measured with Degussa Pt resistance thermometers, which were checked against standards. Phase changes (cloud points) were observed as mixtures were cooled.

Source and Purity of Materials:
   (1) Fluka AG; purity 99 mole %; fractionally distilled, degassed and finally distilled through a P₂O₅ filled tube.
   (2) Fluka AG; purity 99 mole %; purification as above.

Estimated Errors:

   Temperature: reproduced better than 0.1 K.

References:
   ¹ P. Franzosini, Z. Naturforsch. 18A, 224 (1963).