Mixed Ligand Copper(II) Complexes of Amino Acids and Related Compounds with Possible Ligand-Ligand Interactions
スポンサーリンク
概要
- 論文の詳細を見る
Ternary systems composed of copper(II) and two ligands, each with an oppositely charged uncoordinated group in the side chain, have been investigated by synthetic and spectral methods. The absorption and circular dichroism(CD) spectra in the d-d region were measured at various pH values for the binary and ternary systems, Cu(B)<SUB>2</SUB> and Cu(A)(B), where A refers to ethylenediamine-<I>N</I>-monoacetic acid(EDMA), glycylglycine(Gly·Gly), glycyl-β-alanine(Gly·β-Ala), ethylenediamine(en), or glycine(Gly), and B to D- and L-arginine (D- and L-Arg), L-ornithine(L-Orn), L-lysine(L-Lys), L-alanine(L-Ala), or L-valine(L-Val), and the following complexes containing ligands with polar side chains were isolated as crystals: [Cu(EDMA)(L-Arg)]C1O<SUB>4</SUB>·H<SUB>2</SUB>O; [Cu(EDMA)(L-Orn)]ClO<SUB>4</SUB>·1/2H<SUB>2</SUB>O; [Cu(EDMA)(L-Lys)]ClO<SUB>4</SUB>; [Cu(Gly·Gly) (L-Arg)]·3/2H<SUB>2</SUB>O. From comparison of the CD magnitudes expressed in terms of the relative magnitude which assumes half the value for Cu(B)<SUB>2</SUB> as unity, the magnitude enhancements observed for the systems Cu(EDMA)(D- and L-Arg), Cu(EDMA)(L-Orn), Cu(EDMA)-(L-Lys), and Cu(Gly·β-Ala)(D- and L-Arg) in water and in 50% aqueous ethanol have been inferred to be due to the intramolecular electrostatic interactions between the charged groups in the side chains of ligands A and B.
- 公益社団法人 日本化学会の論文
著者
-
Nakahara Akitsugu
Institute Of Chemistry College Of General Education Osaka University
-
Yamauchi Osamu
Institute of Chemistry, College of General Education, Osaka University
-
Nakao Yasuo
Institute of Chemistry, College of General Education, Osaka University
関連論文
- Cytochrome c' Isolated from Achromobacter xylosoxidans GIFU 1055
- Azide-, thiocyanate- or cyanate-bridged di- and trinuclear copper(II) complexes with N,N,N',N'-tetramethylethylenediamine, N,N-diethylethylenediamine, 2,2'-bipyridyl or 1,10-phenanthroline.
- Mixed Ligand Copper(II) Complexes of Amino Acids and Related Compounds with Possible Ligand-Ligand Interactions
- Crystal structures of mixed ligand copper(II) complexes containing L-amino acids. I. L-asparaginato-L-histidinatocopper(II) and its hydrate.
- The Crystal and Molecular Structure of Bis(2-hydroxyethylimino-salicylaldehydato)copper(II)
- Selective modification of the two type I copper sites in human and bovine ceruloplasmin with the action of azide and L-cysteine.
- Mixed ligand copper(II) complexes of .ALPHA.-amino acids with ligand-ligand interactions.
- A facile reduction of copper(II) leading to formation of stable copper(I) complexes. Redox properties of four- and five-coordinate copper complexes.
- 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
- Copper(II) complexes of Schiff bases derived from histamine or 2-(2-aminoethyl)pyridine and 2,3-butanedione or 4-hydroxy-4-methyl-2-pentanone.
- Hydrolysis of Adenosine 5′-Triphosphate in the Presence of Various Polyamines
- Mixed Ligand Complex Formation between Monodentate Ligands and Various Tridentate Ligand-Copper(II) Complexes
- The Crystal and Molecular Structure of N-Salicylidene-α-aminoisobutyratoaquocopper(II)
- Stereoselectivity in mixed ligand copper(II) complexes with electrostatic ligand-ligand interactions. Application to optical resolution of .ALPHA.-amino acids with a charged side chain.
- The Stability of Fused Rings in Metal Chelates. VII. Copper(II) Complexes of Schiff Bases Derived from 2-Acetylpyridine or Pyridine-2-aldehyde and Dipeptides Containing Glycine, β-Alanine and/or α-Aminoisobutyric Acid
- Nickel(II) complexes of Schiff bases derived from salicylaldehyde and glycyl-aspartate or -glutamate. Application to a selective hydrolysis reaction of dimethyl glycylaspartate and glycylglutamate.