Sonochemical reaction of [Fe(CO)5] with 1-methylimidazole in an ionic liquid: Formation of [(1-methylimidazole)6Fe II](PF6)2

David S. Jacob, Volker Kahlenberg, Klaus Wurst, Leonid A. Solovyov, Israel Felner, Linda Shimon, Hugo E. Gottlieb, Aharon Gedanken

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25 Scopus citations

Abstract

The ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate, (BMI +)(PF6-), has been used as a solvent in the sonochemical reaction of 1-methylimidazole and [Fe(CO)5] at 40-50 °C under air. The reaction afforded [(1-methylimidazole)6Fe II] (PF6)2, the structure of which was determined at 293 K by single-crystal X-ray diffraction methods. The salt crystallizes in the trigonal space group P3 with unit-cell parameters of a = 11.4603(16) Å, c = 8.0172(11) Å, and Z = 1. The crystals showed twinning by merohedry, which was accounted for in the structure determination and refinement calculations. All the 1-methylimidazole ligands are equivalent, with a Fe-N bond length of 2.204(3) Å. Mössbauer spectroscopy confirmed the presence of Fe2+.

Original languageEnglish
Pages (from-to)522-528
Number of pages7
JournalEuropean Journal of Inorganic Chemistry
Issue number3
DOIs
StatePublished - 4 Feb 2005

Keywords

  • Ionic liquid
  • Iron imidazole complex
  • Sonochemistry

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