Thiolate-S as anchoring donor in the binary and ternary VO(IV) complexes of mercaptopropionylglycine

Tamás Jakusch, Péter Buglyó, Ana Isabel Tomaz, Joo Costa Pessoa, Tamás Kiss

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

The speciation and solution structures of the binary VO(IV) complexes of mertcaptopropionylglycine and its ternary complexes with 2,2′-bipyridyl, tiron, maltol and oxalic acid were studied by pH-potentiometric and spectroscopic (EPR and UV-Vis) methods. The thiolate-S- donor of mercaptopropionylglycine proved to be an efficient anchoring donor which binds VO(IV) strongly enough to be able to promote deprotonation and subsequent coordination of the peptide-amide group. Ternary complex formation and the promotion of amide deprotonation were found to be favoured with the (N,N) donor 2,2′-bipyridyl, but disfavoured with the (O,O) donor ligands tiron, maltol and oxalic acid.

Original languageEnglish
Pages (from-to)119-128
Number of pages10
JournalInorganica Chimica Acta
Volume339
DOIs
Publication statusPublished - Nov 15 2002

Keywords

  • Mercaptopropionylglycine
  • Peptide-amide
  • Ternary complexes
  • Vanadium complexes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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