Hydrothermal synthesis of a novel μ-dihydroxo-bis(2,6- pyridinedicarboxylatoaquachromium(III)) complex and investigation of its catalytic activity

Burak Ay, Emel Yildiz, Stephanie Jones, Jon Zubieta

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

A new chromium(III) compound [Cr(H 2O)(OH)(C 7H 3NO 4)] 2, μ-dihydroxo-bis(2,6- pyridinedicarboxylatoaquachromium(III)), has been successfully synthesized by the hydrothermal reaction of 2,6-pyridinedicarboxylic acid (H 2pydc) and CrCl 3·6H 2O in the alkali medium. This metal complex was characterized by elemental analysis, IR spectroscopy, thermal analysis and single-crystal X-ray diffraction. The X-ray analysis showed that the structure is molecular and consists of units of two Cr(H 2O)(OH) (C 7H 3NO 4) groups linked through two OH groups. In the complex, each Cr centre is in a distorted octahedral environment, defined by two hydroxyl bridges, an aqua ligand and a tridentate pyridinedicarboxylate anion. The thermal stability and catalytic properties of the complex were also investigated. The complex affected the oxidation of thymol to thymoquinone with 100% selectivity and a conversion rate of 20.25%.

Original languageEnglish (US)
Pages (from-to)15-19
Number of pages5
JournalInorganica Chimica Acta
Volume387
DOIs
StatePublished - May 30 2012

Keywords

  • 2,6-Pydc
  • Cr(III) complex
  • Crystal structure
  • Heterogeneous catalysis
  • Hydrothermal synthesis
  • Thymoquinone

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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