Low-Temperature Thermodynamic Properties of Pyrimidine Nucleosides: Thymidine and Deoxycytidine

This article provides precision heat capacity data in the 6–330 K range for crystalline synthetic samples of pyrimidine nucleosides: thymidine (C10H14N2O5; CAS Number: 50-89-5; fraction purity: 0.999) and deoxycytidine (C9H13N3O4; CAS Number: 951-77-9; fraction purity: 0.999). The heat capacity of the substances was measured by using vacuum adiabatic calorimetry. No anomalies in heat capacity behaviors indicative of phase transitions were detected within the studied temperature range. The experimental data was mathematically processed, enabling calculation of integral thermodynamic functions (entropy, enthalpy, and reduced Gibbs energy) for thymidine and deoxycytidine in the 0–330 K interval.