Synthesis and characterisation of cis-dioxomolybdenum(VI) complexes of N-substituted 3-hydroxy-2-pyridinones

E J Brown, A C Whitwood, Paul Howard Walton, A K Duhme-Klair

Research output: Contribution to journalArticlepeer-review

Abstract

The butoxy- and methoxy-derivatives (HLc, and HLb, respectively) of 1-[(ethoxycarbonyl)methyl]-3-hydroxy-2-(1H)-pyridinone, HLa, were synthesized by transesterification and the mononuclear complexes [MoO2(La-c)(2)] were obtained by the reaction of the ligands with molybdenyl acetylacetonate. The three complexes were fully characterized by H-1 and C-13 NMR spectroscopy, mass spectrometry and elemental analyses. A variable temperature NMR study showed that the N-substituents do not have a significant influence on the racemisation process of the complexes. The comparison of the crystal structure of [MoO2(L-b)(2)] with [MoO2(L-a)(2)] confirmed that an additional methylene group does not affect the immediate coordination environment of the molybdenum centre. The methoxy-derivative HLb was also found to produce a dinuclear complex of composition [{MoO2(L-b)O}(2)], the structure of which was determined by X-ray diffraction.

Original languageEnglish
Pages (from-to)2458-2462
Number of pages5
JournalDalton Transactions
Issue number16
DOIs
Publication statusPublished - 2004

Keywords

  • IRON(III)-CHELATING PROPERTIES
  • DIOXOMOLYBDENUM(VI) COMPLEXES
  • HYDROXYPYRIDINONES
  • CRYSTAL
  • MOLYBDENUM(VI)
  • SIDEROPHORE
  • IRON(III)
  • LIGANDS
  • AGENTS
  • DESIGN

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