Stoichiometric carbon-carbon bond formation mediated by well defined Nb(III) complexes Dedicated to Professor John E. Bercaw, for his deep and wide-ranging contributions to organometallic chemistry and catalysis.

Thomas L. Gianetti, Robert G. Bergman, John Arnold

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

The discovery of a Nb-mediated double coupling of terminal alkynes and carbon monoxide is reported. The Nb(III) complex (BDI)Nb(NtBu)(CO)2 reacts with two equivalents of t-butylacetylene to form a metal-bound yne-one-ene moiety resulting from coupling of CO to two equivalents of the terminal alkyne. Additionally, Z-alkene and α,β-unsaturated imine formation from hydrogenolysis of an internal alkyne bound complex in the presence of an isocyanide ligand is described. 1H NMR spectroscopy and synthesis of a bromide analog support the involvement of an alkenyl iminyl ligand intermediate.

Original languageEnglish (US)
Pages (from-to)19-23
Number of pages5
JournalPolyhedron
Volume84
DOIs
StatePublished - Dec 14 2014
Externally publishedYes

Keywords

  • C-C bond formation
  • Imido
  • Niobium
  • X-ray crystallography
  • synthesis

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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