Thermodynamic properties of tetraphenylantimony 1-adamantanecarboxylate

Abstract

In the present work for the first time, the temperature dependence of the heat capacity $$C_{\text{p}}^{\text{o}}$$ = f(T) of tetraphenylantimony (1-adamantanecarboxylate) was determined in the range 5.6–456 K by methods adiabatic vacuum calorimetry and differential scanning calorimetry. The compound fuses in the range 414–446 K without decomposition, and thermodynamic characteristics of fusion were defined and analyzed. Multifractal treatment of low-temperature heat capacity was made as a result topological structure of the compound was established. The complex of standard thermodynamic functions (enthalpy, entropy, the Gibbs energy) was given for crystal and liquid states in the range from T → 0 to 456 K. Also, standard entropy of formation of a substance in the crystalline state at T = 298.15 K was calculated. Comparison of thermodynamic properties was made for the derivatives of antimony studied in the present work and earlier.