Studies on transition-metal-peptide complexes. Part 12. Copper(II) complexes of dipeptides containing phenylalanine and tyrosine

T. Kiss, Zoltán Szücs

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32 Citations (Scopus)

Abstract

The thermodynamic quantities relating to the copper(II) complexes of glycyl-L-phenylalanine, glycyl-L-tyrosine, L-phenylalanylglycine, and L-tyrosylglycine have been determined pH-metrically and calorimetrically at 25°C and at an ionic strength of 0.2 mol dm-3 (KCl). From these data and the u.v., visible, and e.s.r. spectra of the complexes, it has been established that, besides metal-ligand co-ordination characteristic of simple aliphatic dipeptides, there are interactions between the d-electron orbitals of the copper(II) and the 6π-electron system of the aromatic amino acid, between the hydrophobic parts of the molecule, and between the copper(II) and the phenolate group of the ligand.

Original languageEnglish
Pages (from-to)2443-2447
Number of pages5
JournalJournal of the Chemical Society, Dalton Transactions
Issue number11
DOIs
Publication statusPublished - 1986

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Dipeptides
Phenylalanine
Transition metals
Tyrosine
Copper
Peptides
glycylphenylalanine
phenylalanylglycine
Ligands
Aromatic Amino Acids
Electrons
Ionic strength
Metals
Thermodynamics
Molecules

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

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abstract = "The thermodynamic quantities relating to the copper(II) complexes of glycyl-L-phenylalanine, glycyl-L-tyrosine, L-phenylalanylglycine, and L-tyrosylglycine have been determined pH-metrically and calorimetrically at 25°C and at an ionic strength of 0.2 mol dm-3 (KCl). From these data and the u.v., visible, and e.s.r. spectra of the complexes, it has been established that, besides metal-ligand co-ordination characteristic of simple aliphatic dipeptides, there are interactions between the d-electron orbitals of the copper(II) and the 6π-electron system of the aromatic amino acid, between the hydrophobic parts of the molecule, and between the copper(II) and the phenolate group of the ligand.",
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T1 - Studies on transition-metal-peptide complexes. Part 12. Copper(II) complexes of dipeptides containing phenylalanine and tyrosine

AU - Kiss, T.

AU - Szücs, Zoltán

PY - 1986

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N2 - The thermodynamic quantities relating to the copper(II) complexes of glycyl-L-phenylalanine, glycyl-L-tyrosine, L-phenylalanylglycine, and L-tyrosylglycine have been determined pH-metrically and calorimetrically at 25°C and at an ionic strength of 0.2 mol dm-3 (KCl). From these data and the u.v., visible, and e.s.r. spectra of the complexes, it has been established that, besides metal-ligand co-ordination characteristic of simple aliphatic dipeptides, there are interactions between the d-electron orbitals of the copper(II) and the 6π-electron system of the aromatic amino acid, between the hydrophobic parts of the molecule, and between the copper(II) and the phenolate group of the ligand.

AB - The thermodynamic quantities relating to the copper(II) complexes of glycyl-L-phenylalanine, glycyl-L-tyrosine, L-phenylalanylglycine, and L-tyrosylglycine have been determined pH-metrically and calorimetrically at 25°C and at an ionic strength of 0.2 mol dm-3 (KCl). From these data and the u.v., visible, and e.s.r. spectra of the complexes, it has been established that, besides metal-ligand co-ordination characteristic of simple aliphatic dipeptides, there are interactions between the d-electron orbitals of the copper(II) and the 6π-electron system of the aromatic amino acid, between the hydrophobic parts of the molecule, and between the copper(II) and the phenolate group of the ligand.

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