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 language | English (US) |
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Pages (from-to) | 19-23 |
Number of pages | 5 |
Journal | Polyhedron |
Volume | 84 |
DOIs | |
State | Published - Dec 14 2014 |
Externally published | Yes |
Keywords
- C-C bond formation
- Imido
- Niobium
- X-ray crystallography
- synthesis
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Inorganic Chemistry
- Materials Chemistry