Thermodynamic relations of parent and mixed complexes of asparagine and glutamine with copper(II)

A. Gergely, I. Nagypál, E. Farkas

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

A study was made of the equilibrium and, in part, thermodynamic relations of the parent complexes copper(II)-asparagine and copper(II)-glutamine, and of the mixed complexes copper(II)-asparagine-glycine, copper(II)-asparagine-serine, copper(II)-glutamine-glycine and copper(II)-glutamine-serine. The higher stabilities of the parent complexes copper(II)-asparagine compared to the copper(II) complexes of α-amino-butyric acid, the larger enthalpy change accompanying the formation of the complex CuA, and the deprotonation of the complex CuA2 above pH ∼ 9·5, all indicate that the amide group in the asparagine is also coordinated to the copper(II) ion. The results for the complexes copper(II)-glutamine strongly suggest that the glutamine forms bonds to the copper(II) ion only via its amino and carboxyl groups. The results obtained with the mixed ligand complexes support the above findings.

Original languageEnglish
Pages (from-to)551-555
Number of pages5
JournalJournal of Inorganic and Nuclear Chemistry
Volume37
Issue number2
DOIs
Publication statusPublished - Feb 1975

Fingerprint Dive into the research topics of 'Thermodynamic relations of parent and mixed complexes of asparagine and glutamine with copper(II)'. Together they form a unique fingerprint.

  • Cite this