Photochemistry of tris(diethyldithiocarbamato)iron(III). Reduction to a stable iron(II) complex induced by ligand-to-metal charge transfer excitation

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Abstract

The photolysis of FeIII(et2dtc)3 with et2dtc- = diethyldithiocarbamate in inert solvents (e.g., CH3CN) and in the presence of 1,2-bis(diphenylphosphino)ethane (dppe) leads to the formation of FeII(et2dtc)2(dppe) and (et2dtc)2 = tetraethylthiuramdisulfide. At equimolar concentrations (2.76 × 10-5 M) of FeIII(et2dtc)3 and dppe the quantum yields are Φ = 0.007 at λirr = 333 nm and 0.003 at 436 nm. This photoreaction, which is initiated by ligand-to-metal charge transfer excitation, generates FeII(et2dtc)2 and a et2dtc radical in the primary photochemical step. Product formation occurs by the interception of FeII(et2dtc)2 with dppe.

Original languageEnglish (US)
Pages (from-to)730-732
Number of pages3
JournalInorganic Chemistry Communications
Volume5
Issue number9
DOIs
StatePublished - Sep 1 2002

Keywords

  • Charge transfer
  • Electronic Spectra
  • Iron complexes
  • Photochemistry
  • Sulfur compounds

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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