Potentiometric Study of Complexes Formed between (s)-α-amino-3-hydroxy-5-methyl-4-isoxazolepropanoic Acid and some Transition Metal ions

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dc.contributor.authorOnindo, Charles Otieno
dc.date.accessioned2015-02-16T08:47:50Z
dc.date.available2015-02-16T08:47:50Z
dc.date.issued2003
dc.description.abstractPotentiometric study has been carried out on (S)--amino-3-hydroxy-5-methyl-4-isoxazolepropanoic acid [AMPA] in the presence of transition metal ions to measure the thermodynamic stabilities of its complexes; and hence give an insight into its possible role in binding metal ions. The nitrogen donor atom of AMPA is alanine-like with the addition of a hydroxy-isoxazole ring. The first complex [CuHL], which is fully formed by pH 4 is proposed to be with {N,O} bonding which results in the formation of a stable five membered chelate ring. The [CuL] species has some enhanced stability which suggest some form of tridentate co-ordination through {H2N, COO-, O-}. When this changes to [CuL2], one of these bonds must be broken if Cu(II) is to have a maximum co-ordination number of four. Zn and Cd formed very similar comlexes with AMPA, these were [ZnHL], [ZnL], [ZnL2] and [CdHL], [CdL], [CdL2], respectively. [ZnL] and [ZnL2] are significantly more stable than alanine, suggesting tri-dentate co-ordination. [CdHL] complex is again very important suggesting some bidentate chelation.en_US
dc.identifier.citationBulletin of the Chemical Society of Ethiopia: Vol 17, No 1 (2003)en_US
dc.identifier.issn1011-3924
dc.identifier.urihttp://ir-library.ku.ac.ke/handle/123456789/12233
dc.language.isoenen_US
dc.publisherChemical Society of Ethiopiaen_US
dc.titlePotentiometric Study of Complexes Formed between (s)-α-amino-3-hydroxy-5-methyl-4-isoxazolepropanoic Acid and some Transition Metal ionsen_US
dc.typeArticleen_US
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