ADDUCT FORMATION OF β-DIKETONATO LANTHANOIDS(III) WITH CARBOXYLIC ACIDS HAVING HYDROXYL AND METHOXYL GROUPS
作者:
Yuko HASEGAWA,
Takashi WATANABE,
Hiroyuki IKEUCHI,
Takeshi TOMINAGA,
期刊:
Solvent Extraction and Ion Exchange
(Taylor Available online 1990)
卷期:
Volume 8,
issue 6
页码: 843-854
ISSN:0736-6299
年代: 1990
DOI:10.1080/07366299008918034
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Adduct formation of 2-thenoyltrifluoroacetonato(tta) lantha-num(III), europium(III), and ytterbium(I II) with α-pheny 1 1 actic, α-methoxy phenyl acetic, salicylic, and o-methoxy benzoic acids in chloroform has been studied by solvent extraction technique. It has been found that 1anthanoid(111) chelates form more stable adducts with these carboxylic acids in the sequence: Yb(tta)3< Eu(tta)3< La(tta)3. The adduct formation constants as well as the separation factors obtained as the ratio of the constants between a pair of metals are the largest for α-phenyl lactic acid among these acids. The characteristics with α-phenyl 1actic acid would be caused by the action as bidentate unlike benzoic acid derivatives which work as monodentates owing to the internal complexa-tion through hydrogen bonding.
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