C3B2 Ring Triple-decker Sandwiches and Dimers

2 C3B2 Ring Triple-decker Sandwiches and Dimers 

Paramagnetic 31e dicobalt triple-deckers, for example, CpCo(Et2MeC3B2Et2)CoCp, have been prepared from bis(l,3-diborole) double-decker sandwiches and Cp Co(C2H2)2.37 Reaction of the latter reagent with benzo-1,3-diborafulvene derivatives such as 37 afforded triple-deckers 38 and 39 whose electronic structures have been investigated in detail.37 

---