Abstract
A new acetylide−silylene complex, Cp*(CO)2W(SiPh2)(CCSiMe3) (4), was synthesized by the reaction of Cp*(CO)2W(NCMe)Me with Ph2HSiC≡CSiMe3. Complex 4 reacted with acetone to give the six-membered cyclic vinylidene complex Cp*(CO)2W═C═C(SiMe3)CMe2OSiPh2 (5) by acetone insertion into the acetylide−silylene framework. Treatment of 5 with 4-(dimethylamino)pyridine resulted in the formation of the alkenylcarbyne complex Cp*(CO)2W≡CC(═CMe2)SiMe3 (8) and cyclic diphenylsiloxanes.
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