An Empirical Method for Estimating Normal Boiling Point and other Physical Properties of Alkene Hydrocarbons
Mikio Tamura, Michio Kurata, Kouichiro Nakanishi, Isamu Nagata · Bulletin of the Chemical Society of Japan · 1961
Abstract A method of estimating the structural variation in the boiling point and other physical properties of alkenes is developed. By this method, all properties are expressed in terms of a structural constant called the “effective carbon number” which depends on the number and relative position of double bonds and those of side chains but not on external variables such as the temperature. An empirical equation is presented to correlate the effective carbon number with molecular structure. By combining the use with the previously presented nomogram, it is proved to be quite useful for rapid evaluation of various properties including the temperature-vapor pressure relationship and the critical constants.