EXTRACTION AND SPECTROSCOPIC STUDIES OF HYDROGEN BONDING COMPLEXES OF tris(ACETYLACETONATO)ALUMINUM(III) WITH 3,5-DICHLOROPHENOL FOR A NOVEL SYNERGISM |
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| Authors: | H Imura A Oshiro R Shiga |
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| Affiliation: | Department of Chemistry , Faculty of Science, Ibaraki University , Mito, 310, Japan |
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| Abstract: | ABSTRACT Synergistic enhancement of the extraction of aluminium(III) with acetylacetone (Hacac) in heptane and carbon tetrachloride was observed by the addition of 3,5-dichlorophenol (DCP).This phenomenon is due to the formation of association complexes of Al(acac)3 with DCP. From the extraction-equilibrium analysis, the association complexes were found to be Al(acac)3·n(DCP) (n=1-3) and the overall association constants (βass,n) were determined. The hydrogen bonding of the hydroxyl hydrogen of DCP with Al(acac)3 was evidenced by IR and 1H NMR spectroscopy. The βass,n values determined by IR were in good agreement with those’ obtained by the distribution method. The relationship between the hydrogen bond ability of tris(acetylacetonato)-metals(III) and their structure was discussed by comparison of βass,n for Al(acac)3 with those for some metal(III)-acac chelates studied so far. |
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