IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Nitromethane with Cyclopentane

Components:
   (1) Nitromethane; CH3NO2; [75-52-5]  NIST Chemistry WebBook for detail
   (2) Cyclopentane; C5H10; [287-92-3]  NIST Chemistry WebBook for detail

Original Measurements:
   Riccardi, R.; Franzosini, P.; Rolla, M., Z. Naturforsch. 23A, 1816-8 (1968); *Spinolo, G., Int. Data Ser., Sel. Data Mixtures, Ser. A, (1) and (2), 25-29 (1981) and (1982).

Variables:
   Temperature = 333 K to 353 K

Prepared By:
   V. P. Sazonov

Experimental Data:   (Notes on the Nomenclature)

Mutual solubility of nitromethane and cyclopentane
t/°C	T/K	10² * Mass Fraction w₁ (compiler)	Mole Fraction x₁	Comment(s)
59.5	332.7	-	-	Hydrocarbon-rich phase
59.5	332.7	81.4	0.834	Nitromethane-rich phase
70.5	343.7	-	-	Hydrocarbon-rich phase
70.5	343.7	74.8	0.773	Nitromethane-rich phase
72.3	345.5	17.9	0.200	Hydrocarbon-rich phase
72.3	345.5	-	-	Nitromethane-rich phase
73.2	346.4	19.5	0.218	Hydrocarbon-rich phase
73.2	346.4	-	-	Nitromethane-rich phase
74.0	347.2	-	-	Hydrocarbon-rich phase
74.0	347.2	70.8	0.736	Nitromethane-rich phase
76.9	350.1	24.4	0.271	Hydrocarbon-rich phase
76.9	350.1	-	-	Nitromethane-rich phase
77.5	350.7	26.7	0.295	Hydrocarbon-rich phase
77.5	350.7	-	-	Nitromethane-rich phase
77.6	350.8	-	-	Hydrocarbon-rich phase
77.6	350.8	64.7	0.678	Nitromethane-rich phase
79.3	352.5	-	-	Hydrocarbon-rich phase
79.3	352.5	58.7	0.620	Nitromethane-rich phase
79.6	352.8	34.6	0.378	Hydrocarbon-rich phase
79.6	352.8	-	-	Nitromethane-rich phase
80.0	353.2	41.8	0.452	Hydrocarbon-rich phase
80.0	353.2	48.6	0.521	Nitromethane-rich phase
80.0	353.2	47.0	0.500	Hydrocarbon-rich phase
80.0	353.2	47.0 (UCST)	0.500	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 99.9 mole %; purification as above.

Estimated Errors:

   Temperature: reproduced better than 0.1 K.

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