Synthesis and characterization of mononuclear hydroxamato and hydroximato complexes of iron(III) based on the tris-(2-pyridylmethyl)amine ligand

Dalton Trans. 2008 Dec 7:(45):6415-20. doi: 10.1039/b808967a. Epub 2008 Oct 6.

Abstract

The reaction of acetohydroxamic (CH3C(O)-NHOH), benzhydroxamic acid (PhC(O)-NHOH) or 1-hydroxypyridin-2(1H)-one (pyrC(O)-NOH) in the presence of tris-(2-pyridylmethyl)amine (TPA), sodium methoxide and an iron(III) salt yields the mononuclear complexes [Fe(TPA)(CH3C(O)-NHO)]2+ (), [Fe(TPA)(PhC(O)-NHO)]2+ () and [Fe(TPA)(pyrC(O)-NO)]2+ (). The hydroxamato complexes and are easily converted to their hydroximato form [Fe(TPA)(CH3C(O)=NO)]+ () and [Fe(TPA)(PhC(O)=NO)]+ () by addition of base. The complexes described were characterized by UV-vis spectroscopy, EPR and cyclic voltammetry, as well as single-crystal X-ray crystallography for and .

MeSH terms

  • Crystallography, X-Ray
  • Electrochemistry
  • Electron Spin Resonance Spectroscopy
  • Ferric Compounds / chemical synthesis*
  • Ferric Compounds / chemistry*
  • Hydroxamic Acids / chemical synthesis*
  • Ligands
  • Molecular Conformation
  • Solvents
  • Spectrophotometry, Ultraviolet

Substances

  • Ferric Compounds
  • Hydroxamic Acids
  • Ligands
  • Solvents
  • iron (III) hydroxamate
  • tris(2-pyridylmethyl)amineFe(III)Cl