Reactions of (imidazol-2-ylidene)silver(I) chlorides with group 4 metal containing Lewis acids

D. Hollmann, A.R. Kennedy, M.D. Spicer, T. Ramnial, J.C. Clyburne, C.D. Abernethy

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Abstract

The reactivity of the monomeric N-heterocyclic carbene silver(I) complexes, 1,3-bis-(2,4,6-trimethylphenyl)imidazol-2-ylidene-silver(I) chloride ([Ag(IMes)Cl], 1) and 1,3-bis-(4-bromo-2,6-dimethylphenyl)imidazol-2-ylidene-silver(I) chloride ([Ag(IMeSBr)Cl], 2), toward the group 4 metal containing Lewis acids, TiCl4 and (eta(5)-C5H5)ZrCl3](-) in dichloromethane was investigated. Instead of the expected transfer of the A-heterocyclic carbene to the Lewis acidic metal centers with accompanying precipitation of AgCl, chloride transfer occurred leading to the formation of the salts, [Ag(IMeS)(2)](+)[(TiCl3)(2)(mu(2)-Cl)(3)](-)(_) (3) and [Ag(IMes(Br))(2)(+)[{(eta(5)-C5H5)ZrCl}(2)(mu(2)-Cl)(3)(-) (4). The structure of the [Ag(IMes(Br))(2)](+) cation in 4 is significantly distorted in the solid state by interactions between the para-Br atoms of the IMeSBr ligands and chloride ligands of the anions.
Original languageEnglish
Pages (from-to)5346-5352
Number of pages6
JournalJournal of Organometallic Chemistry
Volume690
Issue number23
DOIs
Publication statusPublished - 15 Nov 2005

Keywords

  • N-heterocyclic carbene
  • silver
  • titanium
  • zirconium
  • poly-nuclear transition metal ions

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