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4-Ethylphenylamino-N,N-diacetic acid

Synthesis, characterization, thermal behaviour and complexing capacity

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Abstract

The thermal behaviours of 4-ethylphenylamino-N,N-diacetic acid (H2EFAD) and its monosodium salt have been investigated from their TG and DSC curves. Likewise, some 4-ethylphenylamino-N, N-diacetato compounds of several di- and trivalent metal ions have been synthesized, characterized and studied by TG and DSC. Most of these compounds show a 1 ∶ 1 stoichiometry and contain crystallization or coordination water. From the DSC curves, the dehydration enthalpies have been calculated. The nature of the pyrolysis residues have been investigated by X-ray diffraction methods.

Zusammenfassung

Das thermische Verhalten von 4-Äthylphenylamino-N,N-diessigsäure (H2EFAD) und dem Mononatriumsalz dieser Säure wurde aus TG- und DSC-Diagrammen ermittelt. Ebenso wurden einige Salze dieser Säure mit zwei- und dreiwertigen Metallionen synthetisiert, charakterisiert und mittels TG und DSC untersucht. Die meisten dieser Verbindungen weisen eine 1 ∶ 1-Stöchiometrie auf und enthalten Kristalloder Koordinationswasser. Aus DSC-Diagrammen wurden die Dehydratisierungsenthalpien berechnet. Die Natur der Pyrolyserückstände wurde röntgendiffraktometrisch untersucht.

Резюме

Методами ТГ и ДСК изуч ено термическое поведение 4-этилфенил амино-N,Nдиуксусной кислоты и ее мононатр иевой соли. Синтезиро вано также несколько солей с дву хи трехвалентными мета ллами, термическое по ведение которых также изучен о методами ТГ и ДСК. Большинство их эт их солей имеют стехиометрический с остав 1∶1 и включают кри сталлизационную кристаллизационную и координационную во ду. Исходя из данных ДС К были вычислены энтальпии дегидратации. Характ ер конечных продукто в пиролиза исследован рентгене-диффракционными методами.

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Salas-Peregrin, J.M., Suárez-Varela, J., Avila-Rosón, J.C. et al. 4-Ethylphenylamino-N,N-diacetic acid. Journal of Thermal Analysis 31, 1289–1299 (1986). https://doi.org/10.1007/BF01914641

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  • DOI: https://doi.org/10.1007/BF01914641

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