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This paper computes the vibrational partition function of some diatomic molecules using an improved energy spectrum obtained recently with the q-deformed hyperbolic Scarf-like potential. Compared to the experimental energy curves, this potential proved to represent well the interaction between the atoms in the studied molecules. The related thermodynamic functions are derived for the,  ScI  andmolecules. Results demonstrated that the computed molecular entropy is in very good agreement with the experimental data for a large range of temperature values. In addition, results are given for the  ScI  molecule for which no experimental entropy values exist. Our results can serve as a reference to experimental studies in chemical physics.

Computing thermodynamic properties of some diatomic molecules using a q-deformed Scarf-like potential