Components:
(1) Indole,
C8H7N; [120-72-9]
NIST WebBook
(2) 5-Methylindole,
C9H9N; [614-96-0]
NIST WebBook
Original Measurements
Pucher, G.; Dehn, W. M.; J. Am. Chem. Soc. 1921, 43, 1753-1758.
Variables:
Ambient temperature: Temperature
Prepared by:
Method/Apparatus/Procedure:
Constant temperature bath and a precision thermometer.
Mixtures of known concentrations sealed in glass ampoules and placed in constant temperature to equilibrate. Samples were rotated while bath temperature slowly increased. Solubility determined by visual noting the same temperature at which the last trace of solid solute disappeared.
Source and Purity of Materials:
- 99.9%, Aldrich Chemical Company, Milwaukee, Wisconsin, USA, was used as received.
- 99.9%, Aldrich Chemical Company, Milwaukee, Wisconsin, USA, was used as received.
- 99.0%, Aldrich Chemical Company, was used as received from manufacturer.
- 99.0%, Aldrich Chemical Company, was used as received from manufacturer.
Estimated Errors:
Ambient temperature: T/K: precision ±0.02. x1: ±0.0001.
Ambient temperature: T/K: precision ±0.02. x1: ±0.0001.
Experimental Values:
| T (K) | x1 | x2 |
|---|---|---|
| 333.74 | 0.0 | 1.0 |
| 327.7 | 1.051 x 10-1 | 8.949 x 10-1 |
| 321.45 | 2.006 x 10-1 | 7.994 x 10-1 |
| 315.52 | 3.021 x 10-1 | 6.979 x 10-1 |
| 307.85 | 3.998 x 10-1 | 6.002 x 10-1 |
| 298.72 | 5.007 x 10-1 | 4.993 x 10-1 |
| 289.2 | 5.990 x 10-1 | 4.010 x 10-1 |
| 300.78 | 7.006 x 10-1 | 2.994 x 10-1 |
| 310.37 | 7.999 x 10-1 | 2.001 x 10-1 |
| 317.99 | 8.996 x 10-1 | 1.004 x 10-1 |
| 326.26 | 1.0 | 0.0 |
(None) Authors report the eutectic point occurs at x1 = 0.5915 and T/K = 289.63.
