The stabilities and thermodynamic properties of thorium(IV) and zirconium(IV) chelates of trans-1,2-diaminocyclohexane-N,N,N′,N′-tetraacetic acid (H 4DCTA)

The interaction between trans-1,2-diaminocyclohexane-N,N,N′,N′-tetraacetic acid (H 4DCTA or H 4Z) and Th(IV) and Zr(IV) ions has been investigated potentiometrically by using a mercury indicator electrode. The formation constants of the chelates ThZ and ZrZ have been evaluated at a constant ionic st...

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Published inJournal of inorganic & nuclear chemistry Vol. 27; no. 7; pp. 1655 - 1662
Main Authors Hseu, Tong-Ming, Wu, Shiou-fu, Chuang, Tung-jong
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.01.1965
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Summary:The interaction between trans-1,2-diaminocyclohexane-N,N,N′,N′-tetraacetic acid (H 4DCTA or H 4Z) and Th(IV) and Zr(IV) ions has been investigated potentiometrically by using a mercury indicator electrode. The formation constants of the chelates ThZ and ZrZ have been evaluated at a constant ionic strength of 0·10 (KNO 3) at 10, 20 and 30°C. Enthalpy and entropy changes characterizing the formation of the chelates have been calculated at 25°C. The results are collected as follows:
ISSN:0022-1902
1878-1225
DOI:10.1016/0022-1902(65)80030-6