Abstract
The physico-chemical properties and thermal stability in air of the light lanthanide 2,3- and 3,5-dimethoxybenzoates were studied and compared in order to observe if there is influence of the position of -OCH3 substituents in benzene ring on their properties, mainly on their thermal stability. The complexes of both of two series are crystalline, hydrated or anhydrous salts with colours typical of Ln3+ ions. The carboxylate group shows the different coordination modes. It may coordinate as a bidentate, chelating or tridentate chelating-bridging ligand. The thermal stabilities of 2,3- and 3,5-dimethoxybenzoates of light lanthanides were studied in the temperature range 293-1173 K. The solubilities of 2,3- and 3,5-dimethoxybenzoates of these elements in water at room temperature are in the orders of 10-3-10-2 mol dm-3 and 10-4 mol dm-3, respectively. The various positions of -OCH3 groups in benzene ring influences some physico-chemical properties of these compounds.
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Ferenc, W., Walków-Dziewulska, A. Comparison of some properties of 2,3- and 3,5-dimethoxybenzoates of light lanthanides. Journal of Thermal Analysis and Calorimetry 74, 511–519 (2003). https://doi.org/10.1023/B:JTAN.0000005188.19320.4c
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DOI: https://doi.org/10.1023/B:JTAN.0000005188.19320.4c