Heteroatom-containing pentadienyl complexes

Compound 95 has been shown to be a useful precursor for the synthesis of a range of open and closed dienyl complexes, in particular, the preparation of open and closed ruthenocene. A series of 1,5-, 2,4- and 3-substituted pentadienyl complexes of ruthenium have been prepared and characterised. A series of heteroatom-containing diene complexes of type 96 have been synthesised. 1,2-Diketones were shown, however, not to coordinate in this fashion, rather to undergo a one-electron transfer reaction giving enediolato-containing complexes. Complexes of type 97 have been synthesised on treatment of the triple decker complex [ (CpR)Co 2(p-r r -C6F[5Me)] with acetone, cyclohexanone, and acetophenone. The mechanism of formation was said to proceed through a... 

---