The Stability of Fused Rings in Metal Chelates. IX. Copper(II) and Nickel(II) Complexes of Schiff Bases Derived from Salicylaldehyde and Dipeptides Containing Glycine and/or β-Alanine
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概要
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Copper(II) and nickel(II) complexes of Schiff bases derived from salicylaldehyde(Sal) and dipeptides containing glycine and/or β-alanine have been prepared. It has been found that Schiff base ligands containing glycylglycine (Gly·Gly), glycyl-β-alanine (Gly·β-Ala) or β-alanylglycine (β-Ala·Gly) as the peptide moieties give rise to square-planar, quadridentate copper(II)- and nickel(II)-chelates, while the <I>N</I>-salicylidene-β-alanyl-β-alanine (Sal=β-Ala·β-Ala) does not form the same type of copper(II)- or nickel(II)-chelate. It is concluded on the basis of spectrophotometric, polarographic and other measurements that the stability decreases in the order 6-5-5-([Cu(Sal=Gly·Gly)])≥6-5-6-([Cu(Sal=Gly·β-Ala)])≥6-6-5-([Cu(Sal=β-Ala·Gly)])>>6-6-6-([Cu(Sal=β-Ala·β-Ala)])fused-ring system.
- 公益社団法人 日本化学会の論文
著者
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Nakahara Akitsugu
Institute of Chemistry, College of General Education, Osaka University
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Nakahara Akitsugu
Institute Of Chemistry College Of General Education Osaka University
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Nakao Yasuo
Institute of Chemistry, College of General Education, Osaka University
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