Reactivities of phosphaalkynes towards diverse bis-silylenes

Bis-silylenes do not only act as strong chelating σ-donor ligands, but also exhibit cooperative behaviour in the activation of small molecules. Three different P-Si containing molecules were prepared from the reaction between t BuC&z.tbd;P and different bis-silylenes, which are bridged by ferrocenediyl, diaminobenzene, or o -carborane. The reactivity between different bis-silylenes and the phosphaalkyne t BuCP was investigated, which has expanded the synthetic possibilities of Si-P-containing heterocycles.