New stable complexes of Au(III) with biuret: X-ray structure of cis-[Au(Biu)Br2]PPh4 and Ab initio investigation of cis-[Au(Biu)X2]-

N. Mintcheva, M. Mitewa, V. Enchev, Y. Nishihara

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


Two anionic complexes of Au(III) with the bioligand biuret, cis-[Au(Biu)X2]- (BiuH2 = biuret, X = Cl, Br), have been synthesized and characterized. The molecular structure of cis-[Au(Biu)Br2]PPh4 has been determined by X-ray diffraction analysis. The complex anion has square-planar geometry with one deprotonated biuret dianion coordinated bidentately to the metal center via the terminal amino nitrogen atoms and two bromide ions in cis positions. There are no significant intermolecular Au-Au interactions in the solid state. Ab initio calculations of the geometric structure at different computational levels for biuret and both anionic complexes as well an IR study of the structures obtained are performed.

Original languageEnglish
Pages (from-to)299-305
Number of pages7
JournalJournal of Coordination Chemistry
Issue number4
Publication statusPublished - Mar 10 2003
Externally publishedYes


  • Ab initio calculations
  • Au(III) complexes
  • Biuret
  • IR study
  • X-ray data

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Materials Chemistry


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