Reaction of (bisimido)niobium(V) complexes with organic azides: [3 + 2] cycloaddition and reversible cleavage of β-diketiminato ligands involving nitrene transfer

Andreas H. Obenhuber, Thomas L. Gianetti, Xavier Berrebi, Robert G. Bergman, John Arnold

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

Abstract

We describe the unusual reactivity of a highly labile diethyl ether adduct of an asymmetric niobium(V) bis(imide) 2.OEt2 containing the monoazabutadiene (MAD) ligand. This species undergoes clean nitrene transfer on treatment with tert-butyl- or di-isopropylphenyl azide resulting in the unprecedented reformation of nacnac ligands bound to the metal center. Corresponding reactions with trimethylsilyl- or tert-butyl azide allowed the isolation of two rare intermediates prior to N2 loss; mechanistic studies support the involvement of two different niobium species.

Original languageEnglish (US)
Pages (from-to)2994-2997
Number of pages4
JournalJournal of the American Chemical Society
Volume136
Issue number8
DOIs
StatePublished - Feb 26 2014
Externally publishedYes

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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