Predicting Entropies of Aliphatic Ethers using Topological Indices

Symmetrical or simple aliphatic ethers are an important class of organic compounds.As a rule, the molecular properties are characterized by physical values, such as, enthalpy,entropy, heat capacity, heat of formation, etc. All physical values are characterized bynumerical values, which are having a quantitative characteristic. As regards the quantitativemeasure of the structure of organic molecules, there has been yet no conventional view of it[1]. But nevertheless, the numerical method, allowing defining the structure of organicmolecules does exist. This is a so-called method of topological indices [2]. This methodallows describing a wide spectrum of molecular properties, establishing the correlationdependences between the properties and values of topological indices [3-5].The criticaltemperatures Tc and the critical pressures pc of dihexyl, dioctyl, and didecyl ethers have beenmeasured.[6-7]