Relations between Physical Properties of Paraffin Hydrocarbons

Paraffin Hydrocarbons. Correlation of Physical Properties

“…The observed or experimental values in Tables III, IV, and V are those given in Table I of the earlier paper (6) except as follows: Paraffins described in the literature for the first time since that paper and listed by Doss (3) are included-namely, mental data were not very reliable; and this applies also to 72 and 143, observed, in small amounts previously by the present author. For these four isomers at least, the calculated properties are preferable.…”

“…The scope of these revisions and estimates was limited to members of corresponding series (mode 1 and parts of modes 2 and 9 in the tables of the present paper); this excludes most of the unknown isomers and many of those whose recorded properties are unreliable. The same limitation in scope applies to relations devised by other authors (1,8,6). In fact, none of them attempts to evaluate more than twelve of the thirty-five nonanes or of the seventy-five decanes.…”

“…For example, mode 3a applies to four octanes. From their observed boiling points were subtracted those of the heptanes from which they are derived by mode 3a, as follows (numbers in parentheses refer to isomers in Table III °Parentheses indicate that the ratio applies to only one isomer, 6 Mode not included in Table I.…”

Silicate Ester and Related Compounds. Method for Calculating the Boiling Points of Tetraalkoxysilanes and Hexaalkoxydisiloxanes.

“…Several attempts have been made to find a method of correlating boiling points and molecular structure (3,5,7). The correlation of Kinney ( 6) is applicable to a wide variety of organic compounds.…”

Method for calculating the properties of hydrocarbons and its application to the refractive indices, densities, and boiling points of the paraffin and monoolefin hydrocarbons

“…These include, for example, the graphical methods used by Calingaert and coworkers in connection with molecular volume [1,2],3 the structural increment method of Francis in connection with refractive index, density, and normal boiling point [3,4], and the theoretical method used by Huggins in connection with density and refractive index [5,6]. The present investigation follows more nearly the method of Huggins [5] in that, from known values for a considerable number of compounds of a given type, certain constants are evaluated who/'le appropriate summation permits evaluation of the property for a given hydrocarbon of the same type, with the number of times a given constant is added being determined entirely by the structure of the given molecule.…”