Preparation of Pyrazinamide Eutectics versus Cocrystals Based on Supramolecular Synthon Variations

Rajbongshi, T and Sarmah, KK and Sarkar, A and Ganduri, R and Cherukuvada, S and Thakur, TS and Thakuria, R (2018) Preparation of Pyrazinamide Eutectics versus Cocrystals Based on Supramolecular Synthon Variations. In: Crystal Growth and Design, 18 (11). pp. 6640-6651.

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Abstract

Cocrystallization of the antituberculosis drug pyrazinamide (PZA) with several substituted aromatic carboxylic acids as coformers was studied. The combinations were analyzed by X-ray diffraction and melting behavior to assess the formation of eutectic versus cocrystal. Benzoic acid, cinnamic acid, and N-heterocycle coformers gave eutectics, whereas the majority of their hydroxyl/methoxy substitutes formed cocrystals with PZA. X-ray crystal structures were obtained for some cocrystals, and binary phase diagrams were constructed to determine eutectic compositions. Differences in functional group position and variations in supramolecular growth were found to dictate the formation of eutectics versus cocrystals. Supramolecular synthon energy calculations on selected combinations validated the formation of eutectic versus cocrystal.

Item Type:	Journal Article
Publication:	Crystal Growth and Design
Publisher:	American Chemical Society
Additional Information:	The copyright for this article belongs to the American Chemical Society.
Keywords:	Benzoic acid; Polymer blends; Solidification; Supramolecular chemistry, Binary phase diagrams; Cocrystallization; Energy calculation; Eutectic composition; Melting behavior; Substituted aromatic; Supramolecular synthons; X ray crystal structures, Eutectics
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	02 Aug 2022 11:54
Last Modified:	02 Aug 2022 11:54
URI:	https://eprints.iisc.ac.in/id/eprint/75159

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