Unexpected C−F activation during redox transmetallation with silver N,N′-bis(2,6-difluorophenyl)formamidinate

Zhifang Guo, Glen B. Deacon, Peter C. Junk

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2 Citations (Scopus)

Abstract

The trivalent lanthanoid formamidinates, [Yb2(DFForm)4F2(py)2] ⋅ CH3CN (1) (DFForm=N,N′-bis(2,6-difluorophenyl)formamidinate), and [La6(DFForm)8F8O(CH3CN)2] ⋅ 6CH3CN (2) have been prepared from redox transmetallation (RT) reactions employing lanthanoid metals and silver formamidinate (AgDFForm) in CH3CN. C−F activation was observed in both reactions. The structure of 1 is a fluorine bridged dimer with two seven-coordinate ytterbium metal ions. Surprisingly the lanthanum complex is a trivalent cage with an unexpected central oxygen atom. [La6(DFForm)8F8O(CH3CN)2] ⋅ 6CH3CN (2) formed a 15 membered ring cage of six La atoms, eight F and one O at the centre. There are three different La3+ ions in 2 with two different coordination numbers. All the La atoms are coordinated by four bridging fluorides and the central oxygen.

Original languageEnglish
Article numbere202200189
Number of pages6
JournalZeitschrift fuer Anorganische und Allgemeine Chemie
Volume648
Issue number19
DOIs
Publication statusPublished - 14 Oct 2022

Keywords

  • Crystal structures.
  • C−F activation reactions
  • Redox transmetallation (RT) reactions
  • Silver N,N′-bis(2,6-difluorophenyl)formamidinate (AgDFForm)

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