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Summary of Research Projects (Supports in 2003
Fiscal Year)
| Subjects |
Synthesis and Application of the Smallest Cyclic Alkynes |
| Representative researcher |
RIKEN Noriyuki SUZUKI |
| Stable and isolable five-membered cyclic alkynes that contain a transition metal in the cyclic structure, metallacyclopentyne compounds, were studied. It was found that zirconacyclopentynes that have no substituents adjacent to the triple bond could be synthesized. In addition to the previously reported zirconium complexes, titanium and hafnium complexes have been prepared and structurally characterized. The zirconacyclopentyne compound reacted with another zirconocene to form bimolecular complexes, and their interconversion was examined. Zirconocene-ethylene and alkyne complexes reacted with 1,2,3-butatriene to give seven-membered cyclic alkynes. In addition, novel dimerization reactions of (Z)-1,4-bis(trimethylsilyl)butatriene was catalyzed by palladium complexes were also achieved. |
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