Selective synthesis of indenylruthenium(II) vinylvinylidene complexes via unstable allenylidene intermediates:Unexpected formation of alkenyl-phosphonio complexes(E)-[Ru{C(H)=C(PPh3)R}(η5-C9H7) (PPh3)2][PF6](R=1-cyclohexenyl,1-cycloheptenyl)through nucleophilic addition

1. Cadierno, V.
2. Gamasa, M.P.
3. Gimeno, J.
4. Borge, J.
5. García-Granda, S.