IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Nitromethane with 1,2-Ethanediol and Cyclohexane

Components:
   (1) Nitromethane; CH3NO2 ; [75-52-5]  NIST Chemistry WebBook for detail
   (2) 1,2-Ethanediol; C2H6O2 ; [107-21-1]  NIST Chemistry WebBook for detail
   (3) Cyclohexane; C6H12; [110-82-7]  NIST Chemistry WebBook for detail

Original Measurements:
   Gudkina, L. V.; dissertation, Novosibirsk Institute of Inorganic Chemistry, 1975.

Variables:
   Temperature = 292 K to 415 K

Prepared By:
   V. P. Sazonov

Experimental Remarks:

   The temperatures of phase transitions were determined in ternary mixtures with a constant mass content of (3), respectively, 2.0, 5.0, 10.0, 20.0, 40.0, and 60.0 mass %, and also in ternary mixtures with a constant mass relationship of (1) and (2), respectively 45.0:55.0, 65.0:35.0, and 75.0:25.0. L₁ nitromethane-rich phase; L₂ ethanediol-rich phase; L₃ cyclohexane-rich phase. The phase which is being dissolved is indicated in the table.

Experimental Data:   (Notes on the Nomenclature)

Table 1. Solubility temperatures of the three liquid phases
t/°C	T/K	Mass Fraction w₁	Mass Fraction w₂	Mole Fraction x₁ (compiler)	Mole Fraction x₂ (compiler)
27.3 (L1)	300.5	0.294	0.686	0.299	0.686
34.6 (L1)	307.8	0.343	0.637	0.348	0.637
27.1 (L1)	300.3	0.285	0.665	0.292	0.671
34.4 (L1)	307.6	0.333	0.617	0.341	0.622
37.7 (L1)	310.9	0.380	0.570	0.389	0.574
39.6 (L1)	312.8	0.427	0.523	0.437	0.526
41.0 (L1)	314.2	0.475	0.475	0.486	0.477
41.6 (L1)	314.8	0.523	0.427	0.534	0.429
41.8 (L2)	315.0	0.665	0.285	0.677	0.286
41.9 (L1)	315.1	0.570	0.380	0.582	0.381
41.9 (a)	315.1	0.618	0.332	0.630	0.333
24.4 (L2)	297.6	0.855	0.045	0.880	0.045
26.3 (L1)	299.5	0.270	0.630	0.281	0.644
32.9 (L2)	306.1	0.810	0.090	0.834	0.091
34.2 (L1)	307.4	0.315	0.585	0.327	0.598
37.5 (L2)	310.7	0.765	0.135	0.788	0.137
37.6 (L1)	310.8	0.360	0.540	0.374	0.551
39.5 (L1)	312.7	0.405	0.495	0.420	0.505
40.4 (L2)	313.6	0.720	0.180	0.743	0.182
40.7 (L1)	313.9	0.450	0.450	0.466	0.459
41.4 (L2)	314.6	0.675	0.225	0.697	0.228
41.4 (L1)	314.6	0.495	0.405	0.513	0.412
41.8 (L2)	315.0	0.630	0.270	0.651	0.274
41.9 (L1)	315.1	0.540	0.360	0.559	0.366
42.0 (a)	315.2	0.585	0.315	0.605	0.320
24.0 (L2)	297.2	0.760	0.040	0.805	0.042
24.9 (L1)	298.1	0.240	0.560	0.256	0.589
33.0 (L2)	306.2	0.720	0.080	0.763	0.083
33.6 (L1)	306.8	0.280	0.520	0.299	0.546
37.2 (L1)	310.4	0.320	0.480	0.341	0.504
37.8 (L2)	311.0	0.680	0.120	0.721	0.125
39.3 (L1)	312.5	0.360	0.440	0.384	0.461
40.5 (L2)	313.7	0.640	0.160	0.679	0.167
40.5 (L1)	313.7	0.400	0.400	0.426	0.419
41.3 (L1)	314.5	0.440	0.360	0.469	0.377
41.4 (L2)	314.6	0.600	0.200	0.637	0.209
41.8 (L1)	315.0	0.480	0.320	0.511	0.335
41.9 (L2)	315.1	0.560	0.240	0.595	0.251
42.1 (a)	315.3	0.520	0.280	0.553	0.293
22.7 (L1)	295.9	0.180	0.420	0.204	0.468
23.3 (L2)	296.5	0.570	0.030	0.641	0.033
32.7 (L1)	305.9	0.210	0.390	0.238	0.434
33.2 (L2)	306.4	0.540	0.060	0.607	0.067
36.8 (L1)	310.0	0.240	0.360	0.272	0.400
38.0 (L2)	311.2	0.510	0.090	0.574	0.100
39.1 (L1)	312.3	0.270	0.330	0.305	0.367
40.4 (L1)	313.6	0.300	0.300	0.339	0.333
40.6 (L2)	313.8	0.480	0.120	0.540	0.133
41.2 (L1)	314.4	0.330	0.270	0.373	0.300
41.5 (L2)	314.7	0.450	0.150	0.507	0.166
41.8 (L1)	315.0	0.360	0.240	0.406	0.266
41.9 (L2)	315.1	0.420	0.180	0.473	0.200
42.0 (a)	315.2	0.390	0.210	0.440	0.233
19.2 (L1)	292.4	0.120	0.280	0.144	0.332
22.7 (L2)	295.9	0.380	0.020	0.455	0.024
31.9 (L1)	305.1	0.140	0.260	0.168	0.308
33.2 (L2)	306.4	0.360	0.040	0.431	0.047
36.6 (L1)	309.8	0.160	0.240	0.192	0.284
38.1 (L2)	311.3	0.340	0.060	0.407	0.071
38.9 (L1)	312.1	0.180	0.220	0.217	0.260
40.3 (L1)	313.5	0.200	0.200	0.240	0.237
40.7 (L2)	313.9	0.320	0.080	0.384	0.094
41.2 (L1)	314.4	0.220	0.180	0.264	0.213
41.6 (L2)	314.8	0.300	0.100	0.360	0.118
41.7 (L1)	314.9	0.240	0.160	0.288	0.189
41.9 (L2)	315.1	0.280	0.120	0.336	0.142
42.0 (a)	315.2	0.260	0.140	0.312	0.165
39.5 (L1)	312.7	0.437	0.534	0.445	0.534
39.5 (L1)	312.7	0.434	0.531	0.442	0.532
39.5 (L1)	312.7	0.431	0.526	0.440	0.528
39.5 (L1)	312.7	0.429	0.525	0.438	0.528
41.3 (L2)	314.5	0.708	0.236	0.722	0.237
41.3 (L2)	314.5	0.703	0.234	0.718	0.235
41.4 (L2)	314.6	0.699	0.233	0.715	0.234
41.9 (a)	315.1	0.618	0.333	0.630	0.334
42.0 (a)	315.2	0.614	0.330	0.627	0.331
42.0 (a)	315.2	0.601	0.324	0.617	0.327

Table 2. Solubility temperatures of the two liquid phases
t/°C	T/K	Mass Fraction w₁	Mass Fraction w₂	Mole Fraction x₁ (compiler)	Mole Fraction x₂ (compiler)
23.5	296.7	0.931	0.049	0.937	0.048
32.2	305.4	0.882	0.098	0.888	0.097
36.5	309.7	0.833	0.147	0.840	0.146
36.7	309.9	0.392	0.588	0.398	0.587
38.7	311.7	0.441	0.539	0.447	0.538
38.8	312.0	0.784	0.196	0.791	0.194
39.8	313.0	0.490	0.490	0.497	0.488
39.9	313.1	0.735	0.245	0.742	0.243
40.3	313.5	0.539	0.441	0.546	0.439
40.4	313.6	0.686	0.294	0.693	0.292
40.5	313.7	0.588	0.392	0.595	0.390
40.6 (a)	313.8	0.637	0.343	0.644	0.341
24.2	297.4	0.902	0.048	0.915	0.048
32.5	305.7	0.858	0.095	0.868	0.095
37.4	310.6	0.807	0.143	0.820	0.143
39.8	313.0	0.760	0.190	0.773	0.190
41.2	314.4	0.713	0.237	0.726	0.237
42.5	315.7	0.665	0.285	0.677	0.286
47.1	320.3	0.618	0.332	0.630	0.333
53.9	327.1	0.570	0.380	0.582	0.381
60.8	334.0	0.523	0.427	0.534	0.429
67.6	340.8	0.475	0.475	0.486	0.477
75.1	348.3	0.427	0.523	0.437	0.526
82.9	356.1	0.380	0.570	0.389	0.574
92.2	365.4	0.333	0.617	0.341	0.622
102.5	375.7	0.285	0.665	0.292	0.671
59.3	332.5	0.855	0.045	0.880	0.045
63.5	336.7	0.810	0.090	0.834	0.091
67.4	340.6	0.765	0.135	0.788	0.137
70.2	343.4	0.720	0.180	0.743	0.182
74.5	347.7	0.675	0.225	0.697	0.228
79.8	353.0	0.630	0.270	0.651	0.274
86.5	359.7	0.585	0.315	0.605	0.320
94.0	367.2	0.540	0.360	0.559	0.366
101.2	374.4	0.495	0.405	0.513	0.412
111.8	385.0	0.450	0.450	0.466	0.459
121.2	394.4	0.405	0.495	0.420	0.505
132.2	405.4	0.360	0.540	0.374	0.551
141.5	414.7	0.315	0.585	0.327	0.598
81.7	354.9	0.760	0.040	0.805	0.042
88.3	361.5	0.720	0.080	0.763	0.083
94.6	367.8	0.680	0.120	0.721	0.125
100.1	373.3	0.640	0.160	0.679	0.167
105.6	378.8	0.600	0.200	0.637	0.209
114.2	387.4	0.560	0.240	0.595	0.251
122.9	396.1	0.520	0.280	0.553	0.293
136.0	409.2	0.480	0.320	0.511	0.335
99.3	372.5	0.570	0.030	0.641	0.033
104.7	377.9	0.540	0.060	0.607	0.067
112.1	385.3	0.510	0.090	0.574	0.100
120.2	393.4	0.480	0.120	0.540	0.133
129.4	402.6	0.450	0.150	0.507	0.166
141.2	414.4	0.420	0.180	0.473	0.200
38.2	311.4	0.448	0.547	0.453	0.543
38.5	311.7	0.446	0.545	0.451	0.542
39.2	312.4	0.441	0.540	0.448	0.538
39.4	312.6	0.440	0.538	0.447	0.537
39.6	312.8	0.744	0.248	0.749	0.245
39.7	312.9	0.741	0.247	0.746	0.245
39.8	313.0	0.736	0.245	0.743	0.243
40.0	313.2	0.730	0.244	0.739	0.242
40.2	313.4	0.724	0.242	0.734	0.241
40.4	313.6	0.721	0.240	0.732	0.239
40.7	313.9	0.717	0.239	0.729	0.239
41.0	314.2	0.714	0.238	0.727	0.238
40.4	313.6	0.645	0.347	0.650	0.344
40.6	313.8	0.643	0.346	0.649	0.343
40.7	313.9	0.640	0.345	0.646	0.343
40.9	314.1	0.635	0.342	0.643	0.340
41.1	314.3	0.630	0.340	0.639	0.339
41.5	314.7	0.626	0.337	0.636	0.337

Notes:
   Table 1  ^a  Critical opalescence.
   Table 2  ^a  Critical opalescence.

Method/Apparatus/Procedure:
   The synthetic method (Alekseev¹) was used. Mixtures of (1), (2) and (3) of mass 10 g were heated with vigorous stirring to a temperature higher than the homogenization temperature, and then slowly cooled until turbidity appeared. Heating and cooling cycles were repeated twice. Temperature values obtained for appearing and disappearing turbidity were averaged.

Source and Purity of Materials:
   (1) Source not specified; pure grade reagent; dried and twice distilled in a glass packed column; n(20 °C, D) = 1.3820, d(20 °C, 4 °C) = 1.1381.
   (2) Source not specified; analytical purity; dried and twice distilled under vacuum.
   (3) Source not specified; pure grade reagent; dried and fractionated through a laboratory column;n(20 °C, D) = 1.4263, d(20 °C, 4 °C) = 0.7785

Estimated Errors:

   Temperature: ± 0.1 K.

References:
   ¹V. F. Alekseev, Zh. Russ. Fiz.-Khim. Ova 8, 249(1876).