Solubility determination and thermodynamic analysis of organic zinc supported by β-diimine ligands in pure solvents

Liu, Y and Li, M and Sahoo, S and Ma, X (2022) Solubility determination and thermodynamic analysis of organic zinc supported by β-diimine ligands in pure solvents. In: Journal of Molecular Liquids, 348 .

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Abstract

In this work, a static analysis method was used to determine the solubility data of β-diimine ligand (1) (L1 = HC(CMeNAr)2, Ar = 2,6-Me2C6H3), and organic zinc compounds: L1ZnEt (2), L2ZnEt (3) (L2 = HC(CMeNAr)2, Ar = 2,6-iPr2C6H3) in six pure solvents (methanol, ethanol, n-hexane, toluene, ether, dichloromethane, tetrahydrofuran) under nitrogen atmosphere. Experimental data are crucial for optimizing the purification, recrystallization process and the design of homogeneous catalysis for compounds 1, 2, and 3 in the industry. Six common thermodynamic models were utilized to correlate the experimental solubility data: Apelblat model, Polynomial empirical equation, λh model, Yaws model, NRTL model and Scatchard-Hildebrand activity coefficient model. These thermodynamic models were evaluated by average absolute relative deviation (AARD) to come to the best fitting model. Among them, the Polynomial empirical equation and the Scatchard-Hildebrand activity coefficient model had wide applicability, and the average AARD was <1. For compounds 1 and 3, Hirshfeld surface analysis was utilized to study the intermolecular interaction. The simulation results showed that H···H contact was obviously predominant in all contact interactions. In addition, apparent thermodynamic functions were derived. Results showed that the dissolution process was entropy increasing and endothermic under the experimental conditions, and the difference in solubility could be explained by spontaneous energy. © 2021

Item Type:	Journal Article
Publication:	Journal of Molecular Liquids
Publisher:	Elsevier B.V.
Additional Information:	The copyright for this article belongs to Elsevier B.V.
Keywords:	Catalysis; Hexane; Ionic liquids; Ligands; Organic solvents; Solubility; Thermoanalysis; Thermodynamic properties; Zinc compounds, Diimine ligand; Empirical equations; Hildebrand; Organic zinc; Organics; Pure solvents; Solubility determination; Thermodynamic functions; Thermodynamic modelling; �-diimine ligand, Dichloromethane
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	13 Dec 2021 11:34
Last Modified:	11 Sep 2022 05:58
URI:	https://eprints.iisc.ac.in/id/eprint/70751

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