One-step synthesis of heteroleptic rare-earth amide complexes featuring fluorenyl-tethered N-heterocyclic carbene ligands

Kieren Evans, Paul A. Morton, Calum Sangster, Stephen M. Mansell

Research output: Contribution to journalArticlepeer-review

Abstract

Reaction of the fluorenyl-tethered imidazolium bromide salt [9-(C13H9)C2H4N(CH)C2H2N(Me)][Br] (I) with [Y{N(SiMe3)2}3] generated the heteroleptic yttrium complex [Y{(η5-C13H8)C2H4N(κ-C)C2H2N(Me)}(Br){N(SiMe3)2}] (1), which contains an Y centre with a piano stool geometry and four different donors. The reaction of I with [Nd{N(SiMe3)2}3] led to single crystals of the dimeric Nd complex [Nd{(η5-C13H8)C2H4N(κ-C)C2H2N(Me)}(μ-Br){N(SiMe3)2}]2 (2), likely due to the larger ionic radius of Nd3+. Reactions of I with [La{N(SiMe3)2}3], which contains the larger La3+ ion, demonstrated the formation of multiple products from ligand redistribution, including [La{(η5-C13H8)C2H4N(κ-C)C2H2N(Me)}{N(SiMe3)2}2] (3) and [La{(η5-C13H8)C2H4N(κ-C)C2H2N(Me)}2(Br)] (4).
Original languageEnglish
Article number115021
JournalPolyhedron
Volume197
Early online date9 Jan 2021
DOIs
Publication statusPublished - 15 Mar 2021

Keywords

  • F-block organometallics
  • Fluorenyl-tethered NHCs
  • Heteroleptic rare-earth complexes
  • NHC ligands

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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