Group 14 metalloles are an interesting class of Si-, Ge-, or Sn-based annulated π- conjugated molecules.[1] The silole ring system contains a σ* orbital on the silicon atom, which effectively interacts with the π* orbital of the butadiene unit, producing a low-lying LUMO. Although a variety of sophisticated silole derivatives have been prepared, the preparation of these well-designed compounds depends heavily on classical SiÀC bond- ...
