Solid–Liquid Equilibrium and Thermodynamic Analysis of Transition Metal Complexes Supported by Bis(imino)pyridine in Different Solvents

Abstract

In this work, a static analysis method was used to measure the solubility data of L 1 (1) (L 1 = 2, 6-bis{1-[(2isopropylphenyl)imino]ethyl}pyridine) in five pure solvents, andBased on the results of the experiment, it was concluded that the solubility of the three complexes also increased as the temperature increased. Eight thermodynamic models were used to correlate experimental solubility data. The results yielded a good fit with an average absolute relative deviation (ARD) of less than 3.5% and an average root mean square deviation (RMSD) of less than 0.15% for these models. In addition, the range of molecular electrostatic potentials of the three compounds was obtained by molecular electrostatic potential analysis. Reasons for solubility differences were analyzed by calculating the Hansen solubility parameters of L 1 . The solubility data measured in this paper can provide a theoretical basis and reference standard for the selection of reaction and recrystallization solvents in future experiments.