A study on the preparation and the physical constants of a number of alkanes and<i>cyclo</i>alkanes

Abstract

Abstract The following hydrocarbons have been prepared in a very high degree of purity: n ‐pentane, 2‐methylbutane, n ‐hexane, 2‐methylpentane, 3‐methylpentane, 2,2‐dimethylbutane. 2,3‐dimethylbutane, 2‐methylhexane, 2, 2‐dimethylpentane, 2,3‐dimethylpentane, 2,4‐dimethylpentane, 3,3‐dimethylpentane, 2,2,3‐trimethylbutane, n ‐octane, 3‐methylheptane, 2,3‐dimethylhexane, 3,4‐dimethylhexane, 3‐methyl‐3‐ethylpentane, 2,2,3‐trimethylpentane, n ‐nonane, n ‐hexadecane, ethyl cyclo butane, cyclo pentane, methyl cyclo pentane, cyclo hexane, methyl cyclo hexane, isopropyl cyclo hexane. The methods described are suitable for preparing the pure compounds in quantities of 1 kg or more. For each of the hydrocarbons and also for n ‐heptane and 2,2,4‐trimethylpentane we have determined accurate values for the boiling point, melting point, densities at 15° and 20° or at 20° and 25°, refractive indices and molecular refractions at the same temperatures for the wave lengths 6563, 5876, 4861, 4341 Å. We have also recorded accurate values for the surface tension at 20° and for the parachor. The critical solution temperatures with aniline have also been determined.