Synthesis and reactivity of neodymium(III) amido-tethered N-heterocyclic carbene complexes

Polly L. Arnold, Stephen T. Liddle

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

The reaction of the heteroleptic Nd(III) iodide, [Nd(L')(N '')(mu-I)] with the potassium salts of primary aryl amides [KN(H)Ar'] or [KN(H)Ar*] affords heteroleptic, structurally characterised, low-coordinate neodymium amides [Nd(L')(N '')(N(H)Ar')] and [Nd(L')(N '')(N(H)Ar*)] cleanly(L' = t-BuNCH2CH2[C{NC(SiMe3)CHNt-Bu}], N '' = N(SiMe3)(2), Ar' = 2,6-Dipp(2)C(6)H(3), Dipp = 2,6-(Pr2C6H3)-C-i, Ar* = 2,6-(2,4,6-(Pr3C6H2)-C-i)(2)C6H3). The potassium terphenyl primary amide [KN(H)Ar*] is readily prepared and isolated, and structurally characterised. Treatment of these primary amide-containing compounds with alkali metal alkyl salts results in ligand exchange to give alkali metal primary amides and intractable heteroleptic Nd(III) alkyl compounds of the form [Nd(L')(N '')(R)] (R = CH2SiMe3, Me). Attempted deprotonation of the Nd-bound primary amide in [Nd(L')(N '')(N(H)Ar*)] with the less nucleophilic phosphazene superbase Bu'N = P{N = P(NMe2)(3)}(3) resulted in indiscriminate deprotonations of peripheral ligand CH groups.

Original languageEnglish
Pages (from-to)603-611
Number of pages9
JournalComptes Rendus Chimie
Volume11
Issue number6-7
DOIs
Publication statusPublished - 2008

Keywords / Materials (for Non-textual outputs)

  • neodymium
  • lanthanide
  • N-heterocyclic carbene
  • amido
  • N-ligand
  • alkali metal
  • phosphazene
  • C-H ACTIVATION
  • STRUCTURAL-CHARACTERIZATION
  • ORGANOMETALLIC COMPOUNDS
  • YTTRIUM COMPLEXES
  • CARBON-DIOXIDE
  • REDUCTION
  • CHEMISTRY
  • LIGANDS
  • BASES
  • DIPP

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