Trapping unstable terminal M-O multiple bonds of monocyclopentadienyl niobium and tantalum complexes with Lewis acids

1. Sánchez-Nieves, J.
2. Frutos, L.M.
3. Royo, P.
4. Castaño, O.
5. Herdtweck, E.
6. Mosquera, M.E.G.