The complex Pt(IPr)(SnBut 3)(H), 1 [IPr=N-heterocylic carbene ligand N,N'-bis-(2,6-(diisopropyl)phenyl)imidazol-2-ylidene] reacts with trimethylsilylacetylene to yield the C-H activation product Pt(IPr)(SnBut 3)(κ 1-C≡CSiMe3)(H)2, 2. Complex 2 isomerizes to form the unique complex Pt(IPr)[η 2-E-(SnBut 3)(H)C=C(SiMe3)(H)], 3. This demonstrates that in addition to functioning as a bulky ligand the SnBut 3 group can also be actively involved in catalysis. Compound 1 catalyzes the reaction of trimethylsilylacetylene and tri-t-butylstannane at room temperature to afford the selective hydrostannylated product E-(SnBut 3)(H)C=C(SiMe3)(H), 4. Structures of all compounds have been determined by single crystal x-ray diffraction analyses.
- Bulky ligands
- N heterocyclic carbene, tin, unsaturation, platinum
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Organic Chemistry
- Inorganic Chemistry
- Materials Chemistry