Relative stability of tris(2-thenoyltrifluoroacetonato) lanthanoid(III) adducts with carboxylic acids having naphthalene ring

Journal Article · Mon Jan 01 04:00:00 EST 1996 · Solvent Extraction and Ion Exchange

DOI:https://doi.org/10.1080/07366299608918328· OSTI ID:219647

Hasegawa, Yuko; Yamanda, Takami; Nagata, Koji ^[1]

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1. Science Univ. of Tokyo (Japan)

The formation constants of the adduts of tris(1-(2-thienly)-4,4, 4-trifluoro-1,3-butanedionato)lanthanoids(III) with 1- and 2-naphthalenecarboxylic or 1- and 2-napthaleneacetic acids have been determined by the solvent extraction method at 298K. It has been found that the adducts with napthalenecarboxylic acid are a little more stable than those with napthaleneacetic acid irrespective of lanthanoid as similar as the formation of more stable adducts with benzoic acid than with phenylacetic acid reported before. The formation constants of the adducts of several lanthanoid chelates with these four carboxylic acids decreased from lanthanum to samarium and from terbium to lutetium with increasing atomic number, while the constants did not change much in the middle of the series. Such trend has been discussed in the relation to the difference of the coordination number between the lighter and the heavier lanthanoids(III). 9 refs., 3 figs., 3 tabs.

• Sponsoring Organization: USDOE
• OSTI ID: 219647
• Journal Information: Solvent Extraction and Ion Exchange, Journal Name: Solvent Extraction and Ion Exchange Journal Issue: 1 Vol. 14; ISSN 0736-6299; ISSN SEIEDB
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
ADDUCTS
ATOMIC NUMBER
CARBOXYLIC ACIDS
COORDINATION NUMBER
DISTRIBUTION FUNCTIONS
NAPHTHALENE
ORGANOMETALLIC COMPOUNDS
RARE EARTH COMPLEXES
SOLVENT EXTRACTION
STABILITY