Habit of long-chain molecular crystals

Abstract

The quantitative analysis of the temperature dependence of the heat capacity of molecular crystals with chains of different lengths was performed using the theory of diffuse first-order phase transitions. The same chemical structure of the “core” of molecular crystals of {CH₃(CH₂)_nCH₃} normal paraffins, {COH(CH₂)_nCOH} diols, {CH₃(CH₂)_nCOH} normal alcohols, and {CH₃(CH₂)_nCOOH} saturated carboxylic and {COOH(CH₂)_nCOOH} dicarboxylic acids enabled the comparative analysis of phase transition parameters.